<?xml version="1.0" encoding="UTF-8"?>

<!--XBRL Document Created with the Workiva Platform-->
<!--Copyright 2026 Workiva-->
<!--r:a4ece9b3-6f27-4b17-9460-c781799bbf30,g:0bd355db-8aed-49ee-85e4-e43ed6751f34-->
<link:linkbase xmlns:link="http://www.xbrl.org/2003/linkbase" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://www.xbrl.org/2003/linkbase http://www.xbrl.org/2003/xbrl-linkbase-2003-12-31.xsd">
  <link:roleRef roleURI="http://ouster.com/role/CONSOLIDATEDBALANCESHEETS" xlink:type="simple" xlink:href="oust-20251231.xsd#CONSOLIDATEDBALANCESHEETS"/>
  <link:calculationLink xlink:role="http://ouster.com/role/CONSOLIDATEDBALANCESHEETS" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_Assets_9cef1c32-e826-40a8-abe9-50fb2d2cabdb" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_Assets"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AssetsCurrent_08ef062a-26ce-43c2-bdee-8977b72b1058" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_AssetsCurrent"/>
    <link:calculationArc order="1" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_Assets_9cef1c32-e826-40a8-abe9-50fb2d2cabdb" xlink:to="loc_us-gaap_AssetsCurrent_08ef062a-26ce-43c2-bdee-8977b72b1058" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherAssetsNoncurrent_9bdadf22-c516-4a54-a287-5f12f0a39876" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_OtherAssetsNoncurrent"/>
    <link:calculationArc order="2" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_Assets_9cef1c32-e826-40a8-abe9-50fb2d2cabdb" xlink:to="loc_us-gaap_OtherAssetsNoncurrent_9bdadf22-c516-4a54-a287-5f12f0a39876" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PropertyPlantAndEquipmentNet_cba153b0-cf72-4966-9627-f33ab02a27cc" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_PropertyPlantAndEquipmentNet"/>
    <link:calculationArc order="3" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_Assets_9cef1c32-e826-40a8-abe9-50fb2d2cabdb" xlink:to="loc_us-gaap_PropertyPlantAndEquipmentNet_cba153b0-cf72-4966-9627-f33ab02a27cc" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OperatingLeaseRightOfUseAsset_bc185715-0678-44a0-a314-3c5b6e2b3486" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_OperatingLeaseRightOfUseAsset"/>
    <link:calculationArc order="4" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_Assets_9cef1c32-e826-40a8-abe9-50fb2d2cabdb" xlink:to="loc_us-gaap_OperatingLeaseRightOfUseAsset_bc185715-0678-44a0-a314-3c5b6e2b3486" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RestrictedCashNoncurrent_868ad77c-b991-412f-aae5-578ae41df393" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_RestrictedCashNoncurrent"/>
    <link:calculationArc order="5" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_Assets_9cef1c32-e826-40a8-abe9-50fb2d2cabdb" xlink:to="loc_us-gaap_RestrictedCashNoncurrent_868ad77c-b991-412f-aae5-578ae41df393" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IntangibleAssetsNetExcludingGoodwill_d4e8df4e-6298-4592-a267-35c68bb321ca" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_IntangibleAssetsNetExcludingGoodwill"/>
    <link:calculationArc order="6" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_Assets_9cef1c32-e826-40a8-abe9-50fb2d2cabdb" xlink:to="loc_us-gaap_IntangibleAssetsNetExcludingGoodwill_d4e8df4e-6298-4592-a267-35c68bb321ca" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ContractWithCustomerAssetNetNoncurrent_ed04140c-0eab-493c-9031-8b6f2f12d766" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ContractWithCustomerAssetNetNoncurrent"/>
    <link:calculationArc order="7" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_Assets_9cef1c32-e826-40a8-abe9-50fb2d2cabdb" xlink:to="loc_us-gaap_ContractWithCustomerAssetNetNoncurrent_ed04140c-0eab-493c-9031-8b6f2f12d766" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StockholdersEquity_45c13016-74f3-48fa-83f1-d5231126a477" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_StockholdersEquity"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RetainedEarningsAccumulatedDeficit_55941e72-ce45-404d-9a4d-a3abe2dfbdb2" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_RetainedEarningsAccumulatedDeficit"/>
    <link:calculationArc order="1" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_StockholdersEquity_45c13016-74f3-48fa-83f1-d5231126a477" xlink:to="loc_us-gaap_RetainedEarningsAccumulatedDeficit_55941e72-ce45-404d-9a4d-a3abe2dfbdb2" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AccumulatedOtherComprehensiveIncomeLossNetOfTax_22bf8c6f-b2e1-46b7-b640-dbf5de893bab" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_AccumulatedOtherComprehensiveIncomeLossNetOfTax"/>
    <link:calculationArc order="2" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_StockholdersEquity_45c13016-74f3-48fa-83f1-d5231126a477" xlink:to="loc_us-gaap_AccumulatedOtherComprehensiveIncomeLossNetOfTax_22bf8c6f-b2e1-46b7-b640-dbf5de893bab" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AdditionalPaidInCapital_96d163cd-5e45-493f-ac5d-9eea371e7788" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_AdditionalPaidInCapital"/>
    <link:calculationArc order="3" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_StockholdersEquity_45c13016-74f3-48fa-83f1-d5231126a477" xlink:to="loc_us-gaap_AdditionalPaidInCapital_96d163cd-5e45-493f-ac5d-9eea371e7788" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CommonStockValue_9c40ca38-42a8-414a-b32c-c08022b30746" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_CommonStockValue"/>
    <link:calculationArc order="4" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_StockholdersEquity_45c13016-74f3-48fa-83f1-d5231126a477" xlink:to="loc_us-gaap_CommonStockValue_9c40ca38-42a8-414a-b32c-c08022b30746" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LiabilitiesAndStockholdersEquity_650fcd7e-da68-478b-90af-d783b26e9c13" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_LiabilitiesAndStockholdersEquity"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StockholdersEquity_771a0eca-e13b-485f-a443-c8ade5e64c1b" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_StockholdersEquity"/>
    <link:calculationArc order="1" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_LiabilitiesAndStockholdersEquity_650fcd7e-da68-478b-90af-d783b26e9c13" xlink:to="loc_us-gaap_StockholdersEquity_771a0eca-e13b-485f-a443-c8ade5e64c1b" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CommitmentsAndContingencies_d34e6e8d-a1d5-43d3-9d8e-26df77021a33" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_CommitmentsAndContingencies"/>
    <link:calculationArc order="2" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_LiabilitiesAndStockholdersEquity_650fcd7e-da68-478b-90af-d783b26e9c13" xlink:to="loc_us-gaap_CommitmentsAndContingencies_d34e6e8d-a1d5-43d3-9d8e-26df77021a33" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_Liabilities_608c0dd1-6f06-4fa1-8e2b-30b50c6ac48e" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_Liabilities"/>
    <link:calculationArc order="3" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_LiabilitiesAndStockholdersEquity_650fcd7e-da68-478b-90af-d783b26e9c13" xlink:to="loc_us-gaap_Liabilities_608c0dd1-6f06-4fa1-8e2b-30b50c6ac48e" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LiabilitiesCurrent_93516688-b402-45b8-b9f8-b7b4cbd06679" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_LiabilitiesCurrent"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AccruedLiabilitiesCurrent_75f987b5-c23a-4ec7-8902-ff0a0705518f" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_AccruedLiabilitiesCurrent"/>
    <link:calculationArc order="1" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_LiabilitiesCurrent_93516688-b402-45b8-b9f8-b7b4cbd06679" xlink:to="loc_us-gaap_AccruedLiabilitiesCurrent_75f987b5-c23a-4ec7-8902-ff0a0705518f" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OperatingLeaseLiabilityCurrent_06053770-ac75-4dcc-9401-528b66d84a33" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_OperatingLeaseLiabilityCurrent"/>
    <link:calculationArc order="2" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_LiabilitiesCurrent_93516688-b402-45b8-b9f8-b7b4cbd06679" xlink:to="loc_us-gaap_OperatingLeaseLiabilityCurrent_06053770-ac75-4dcc-9401-528b66d84a33" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AccountsPayableCurrent_de03998c-14df-4ff2-81c9-79f56287c252" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_AccountsPayableCurrent"/>
    <link:calculationArc order="3" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_LiabilitiesCurrent_93516688-b402-45b8-b9f8-b7b4cbd06679" xlink:to="loc_us-gaap_AccountsPayableCurrent_de03998c-14df-4ff2-81c9-79f56287c252" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ContractWithCustomerLiabilityCurrent_d3c457be-da1e-4645-a9d9-6e009b5d71ff" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ContractWithCustomerLiabilityCurrent"/>
    <link:calculationArc order="4" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_LiabilitiesCurrent_93516688-b402-45b8-b9f8-b7b4cbd06679" xlink:to="loc_us-gaap_ContractWithCustomerLiabilityCurrent_d3c457be-da1e-4645-a9d9-6e009b5d71ff" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_Liabilities_69299f3c-aafd-47e6-81aa-7b966fdb3303" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_Liabilities"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LiabilitiesCurrent_056c4f02-119c-40d5-8ebe-1d1e9f52275d" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_LiabilitiesCurrent"/>
    <link:calculationArc order="1" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_Liabilities_69299f3c-aafd-47e6-81aa-7b966fdb3303" xlink:to="loc_us-gaap_LiabilitiesCurrent_056c4f02-119c-40d5-8ebe-1d1e9f52275d" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OperatingLeaseLiabilityNoncurrent_48e6a5f4-93d5-4d75-9167-0d1bce01a98b" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_OperatingLeaseLiabilityNoncurrent"/>
    <link:calculationArc order="2" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_Liabilities_69299f3c-aafd-47e6-81aa-7b966fdb3303" xlink:to="loc_us-gaap_OperatingLeaseLiabilityNoncurrent_48e6a5f4-93d5-4d75-9167-0d1bce01a98b" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherLiabilitiesNoncurrent_7ee27c78-5e4d-4a4d-b05d-93e5e2bf1370" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_OtherLiabilitiesNoncurrent"/>
    <link:calculationArc order="3" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_Liabilities_69299f3c-aafd-47e6-81aa-7b966fdb3303" xlink:to="loc_us-gaap_OtherLiabilitiesNoncurrent_7ee27c78-5e4d-4a4d-b05d-93e5e2bf1370" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ContractWithCustomerLiabilityNoncurrent_1e39a7df-6f55-434f-8848-42f75075a311" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ContractWithCustomerLiabilityNoncurrent"/>
    <link:calculationArc order="4" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_Liabilities_69299f3c-aafd-47e6-81aa-7b966fdb3303" xlink:to="loc_us-gaap_ContractWithCustomerLiabilityNoncurrent_1e39a7df-6f55-434f-8848-42f75075a311" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AssetsCurrent_00240001-6351-4b30-85e6-6f63487aa388" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_AssetsCurrent"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CashAndCashEquivalentsAtCarryingValue_79a3811c-814f-4970-a344-33081c87accd" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_CashAndCashEquivalentsAtCarryingValue"/>
    <link:calculationArc order="1" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_AssetsCurrent_00240001-6351-4b30-85e6-6f63487aa388" xlink:to="loc_us-gaap_CashAndCashEquivalentsAtCarryingValue_79a3811c-814f-4970-a344-33081c87accd" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PrepaidExpenseAndOtherAssetsCurrent_7df493e3-42ca-42e5-9727-fa8719fb47db" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_PrepaidExpenseAndOtherAssetsCurrent"/>
    <link:calculationArc order="2" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_AssetsCurrent_00240001-6351-4b30-85e6-6f63487aa388" xlink:to="loc_us-gaap_PrepaidExpenseAndOtherAssetsCurrent_7df493e3-42ca-42e5-9727-fa8719fb47db" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AccountsReceivableNetCurrent_b769cee8-d88d-4f18-9169-3ded7a0b13ac" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_AccountsReceivableNetCurrent"/>
    <link:calculationArc order="3" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_AssetsCurrent_00240001-6351-4b30-85e6-6f63487aa388" xlink:to="loc_us-gaap_AccountsReceivableNetCurrent_b769cee8-d88d-4f18-9169-3ded7a0b13ac" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RestrictedCashCurrent_c9279274-badd-4484-86c3-bf15d2d2e916" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_RestrictedCashCurrent"/>
    <link:calculationArc order="4" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_AssetsCurrent_00240001-6351-4b30-85e6-6f63487aa388" xlink:to="loc_us-gaap_RestrictedCashCurrent_c9279274-badd-4484-86c3-bf15d2d2e916" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_InventoryNet_19f4dd33-0d13-412d-a94e-d42e102fe91c" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_InventoryNet"/>
    <link:calculationArc order="5" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_AssetsCurrent_00240001-6351-4b30-85e6-6f63487aa388" xlink:to="loc_us-gaap_InventoryNet_19f4dd33-0d13-412d-a94e-d42e102fe91c" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShortTermInvestments_ea180426-7573-4cdc-9910-2345dc05a4c9" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ShortTermInvestments"/>
    <link:calculationArc order="6" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_AssetsCurrent_00240001-6351-4b30-85e6-6f63487aa388" xlink:to="loc_us-gaap_ShortTermInvestments_ea180426-7573-4cdc-9910-2345dc05a4c9" xlink:type="arc"/>
  </link:calculationLink>
  <link:roleRef roleURI="http://ouster.com/role/CONSOLIDATEDSTATEMENTSOFOPERATIONSANDCOMPREHENSIVELOSS" xlink:type="simple" xlink:href="oust-20251231.xsd#CONSOLIDATEDSTATEMENTSOFOPERATIONSANDCOMPREHENSIVELOSS"/>
  <link:calculationLink xlink:role="http://ouster.com/role/CONSOLIDATEDSTATEMENTSOFOPERATIONSANDCOMPREHENSIVELOSS" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OperatingExpenses_138bd80d-dd6b-4b7f-a3cd-2269b1c2b4d5" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_OperatingExpenses"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SellingAndMarketingExpense_87aaea81-c066-41ac-ad39-e2cb73d387db" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_SellingAndMarketingExpense"/>
    <link:calculationArc order="1" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_OperatingExpenses_138bd80d-dd6b-4b7f-a3cd-2269b1c2b4d5" xlink:to="loc_us-gaap_SellingAndMarketingExpense_87aaea81-c066-41ac-ad39-e2cb73d387db" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_GeneralAndAdministrativeExpense_0083c897-eaac-4bd2-83ef-fdabbe6cac4e" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_GeneralAndAdministrativeExpense"/>
    <link:calculationArc order="2" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_OperatingExpenses_138bd80d-dd6b-4b7f-a3cd-2269b1c2b4d5" xlink:to="loc_us-gaap_GeneralAndAdministrativeExpense_0083c897-eaac-4bd2-83ef-fdabbe6cac4e" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ResearchAndDevelopmentExpense_cf6cbaf1-c118-43d8-8e7d-5b66d63fb0fe" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ResearchAndDevelopmentExpense"/>
    <link:calculationArc order="3" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_OperatingExpenses_138bd80d-dd6b-4b7f-a3cd-2269b1c2b4d5" xlink:to="loc_us-gaap_ResearchAndDevelopmentExpense_cf6cbaf1-c118-43d8-8e7d-5b66d63fb0fe" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_GrossProfit_2be461de-28de-4cf5-823d-c4bc8f6371fb" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_GrossProfit"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RevenueFromContractWithCustomerExcludingAssessedTax_0c7f9fbd-f25c-44ee-911f-206f6b3b4e29" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_RevenueFromContractWithCustomerExcludingAssessedTax"/>
    <link:calculationArc order="1" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_GrossProfit_2be461de-28de-4cf5-823d-c4bc8f6371fb" xlink:to="loc_us-gaap_RevenueFromContractWithCustomerExcludingAssessedTax_0c7f9fbd-f25c-44ee-911f-206f6b3b4e29" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CostOfRevenue_7088f4f8-e8f0-47bb-95c7-30faac27649a" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_CostOfRevenue"/>
    <link:calculationArc order="2" weight="-1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_GrossProfit_2be461de-28de-4cf5-823d-c4bc8f6371fb" xlink:to="loc_us-gaap_CostOfRevenue_7088f4f8-e8f0-47bb-95c7-30faac27649a" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest_e9b5d137-3a4f-47c0-956b-7e07cbaffa34" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OperatingIncomeLoss_ffd60657-dbec-4bf1-a01b-2a3badec0b4a" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_OperatingIncomeLoss"/>
    <link:calculationArc order="1" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest_e9b5d137-3a4f-47c0-956b-7e07cbaffa34" xlink:to="loc_us-gaap_OperatingIncomeLoss_ffd60657-dbec-4bf1-a01b-2a3badec0b4a" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_NonoperatingIncomeExpense_b4d16d90-f00e-4516-b3c3-cef2d508e31d" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_NonoperatingIncomeExpense"/>
    <link:calculationArc order="2" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest_e9b5d137-3a4f-47c0-956b-7e07cbaffa34" xlink:to="loc_us-gaap_NonoperatingIncomeExpense_b4d16d90-f00e-4516-b3c3-cef2d508e31d" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_NonoperatingIncomeExpense_4a6b9d1c-480b-4b7c-9636-c7b82a380a02" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_NonoperatingIncomeExpense"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_InvestmentIncomeInterest_8907c180-1c03-45f9-9c85-87dd7f4445e6" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_InvestmentIncomeInterest"/>
    <link:calculationArc order="1" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NonoperatingIncomeExpense_4a6b9d1c-480b-4b7c-9636-c7b82a380a02" xlink:to="loc_us-gaap_InvestmentIncomeInterest_8907c180-1c03-45f9-9c85-87dd7f4445e6" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_InterestExpenseNonoperating_670c4c34-1a82-4e42-b0fa-3e0568a0cc90" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_InterestExpenseNonoperating"/>
    <link:calculationArc order="2" weight="-1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NonoperatingIncomeExpense_4a6b9d1c-480b-4b7c-9636-c7b82a380a02" xlink:to="loc_us-gaap_InterestExpenseNonoperating_670c4c34-1a82-4e42-b0fa-3e0568a0cc90" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherNonoperatingIncomeExpense_3c2fda01-0cb9-4817-9e40-ecca79d87371" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_OtherNonoperatingIncomeExpense"/>
    <link:calculationArc order="3" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NonoperatingIncomeExpense_4a6b9d1c-480b-4b7c-9636-c7b82a380a02" xlink:to="loc_us-gaap_OtherNonoperatingIncomeExpense_3c2fda01-0cb9-4817-9e40-ecca79d87371" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OperatingIncomeLoss_87733839-cf35-4747-9f66-a33e7c700d2e" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_OperatingIncomeLoss"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OperatingExpenses_6256aa90-5ca1-46ca-9617-b6f7ff0bd61e" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_OperatingExpenses"/>
    <link:calculationArc order="1" weight="-1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_OperatingIncomeLoss_87733839-cf35-4747-9f66-a33e7c700d2e" xlink:to="loc_us-gaap_OperatingExpenses_6256aa90-5ca1-46ca-9617-b6f7ff0bd61e" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_GrossProfit_fcc8120c-b8ec-4cdd-86a6-caf162ccb71d" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_GrossProfit"/>
    <link:calculationArc order="2" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_OperatingIncomeLoss_87733839-cf35-4747-9f66-a33e7c700d2e" xlink:to="loc_us-gaap_GrossProfit_fcc8120c-b8ec-4cdd-86a6-caf162ccb71d" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ComprehensiveIncomeNetOfTax_8afb223d-083c-4af0-aee3-77b502cddd2d" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ComprehensiveIncomeNetOfTax"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_NetIncomeLoss_d26c32ed-b49e-413f-a8b3-2c7586a3e471" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_NetIncomeLoss"/>
    <link:calculationArc order="1" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_ComprehensiveIncomeNetOfTax_8afb223d-083c-4af0-aee3-77b502cddd2d" xlink:to="loc_us-gaap_NetIncomeLoss_d26c32ed-b49e-413f-a8b3-2c7586a3e471" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherComprehensiveIncomeLossForeignCurrencyTransactionAndTranslationAdjustmentNetOfTax_499dfe11-7e76-442f-90ad-13a64f982241" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_OtherComprehensiveIncomeLossForeignCurrencyTransactionAndTranslationAdjustmentNetOfTax"/>
    <link:calculationArc order="2" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_ComprehensiveIncomeNetOfTax_8afb223d-083c-4af0-aee3-77b502cddd2d" xlink:to="loc_us-gaap_OtherComprehensiveIncomeLossForeignCurrencyTransactionAndTranslationAdjustmentNetOfTax_499dfe11-7e76-442f-90ad-13a64f982241" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherComprehensiveIncomeLossAvailableForSaleSecuritiesAdjustmentNetOfTax_70ae7a2d-3e7c-479d-b904-5c998f233d8d" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_OtherComprehensiveIncomeLossAvailableForSaleSecuritiesAdjustmentNetOfTax"/>
    <link:calculationArc order="3" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_ComprehensiveIncomeNetOfTax_8afb223d-083c-4af0-aee3-77b502cddd2d" xlink:to="loc_us-gaap_OtherComprehensiveIncomeLossAvailableForSaleSecuritiesAdjustmentNetOfTax_70ae7a2d-3e7c-479d-b904-5c998f233d8d" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_NetIncomeLoss_0f07b19b-9ec1-420e-bba3-90c3132da84b" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_NetIncomeLoss"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest_96ccc194-4937-4264-b9b8-9b5434c4f76b" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest"/>
    <link:calculationArc order="1" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetIncomeLoss_0f07b19b-9ec1-420e-bba3-90c3132da84b" xlink:to="loc_us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest_96ccc194-4937-4264-b9b8-9b5434c4f76b" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncomeTaxExpenseBenefit_7d172086-6baa-427c-83fd-93fa9526e59f" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_IncomeTaxExpenseBenefit"/>
    <link:calculationArc order="2" weight="-1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetIncomeLoss_0f07b19b-9ec1-420e-bba3-90c3132da84b" xlink:to="loc_us-gaap_IncomeTaxExpenseBenefit_7d172086-6baa-427c-83fd-93fa9526e59f" xlink:type="arc"/>
  </link:calculationLink>
  <link:roleRef roleURI="http://ouster.com/role/CONSOLIDATEDSTATEMENTSOFCASHFLOWS" xlink:type="simple" xlink:href="oust-20251231.xsd#CONSOLIDATEDSTATEMENTSOFCASHFLOWS"/>
  <link:calculationLink xlink:role="http://ouster.com/role/CONSOLIDATEDSTATEMENTSOFCASHFLOWS" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect_285ba5cb-4143-47dd-92a1-ca70ac006ad4" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_NetCashProvidedByUsedInInvestingActivities_9d369b6e-037b-4050-b014-15a0fb94ff0e" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_NetCashProvidedByUsedInInvestingActivities"/>
    <link:calculationArc order="1" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect_285ba5cb-4143-47dd-92a1-ca70ac006ad4" xlink:to="loc_us-gaap_NetCashProvidedByUsedInInvestingActivities_9d369b6e-037b-4050-b014-15a0fb94ff0e" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_NetCashProvidedByUsedInOperatingActivities_a6c6683f-7da4-4efb-ae6b-1675b33f387e" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_NetCashProvidedByUsedInOperatingActivities"/>
    <link:calculationArc order="2" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect_285ba5cb-4143-47dd-92a1-ca70ac006ad4" xlink:to="loc_us-gaap_NetCashProvidedByUsedInOperatingActivities_a6c6683f-7da4-4efb-ae6b-1675b33f387e" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_NetCashProvidedByUsedInFinancingActivities_53f1b156-0c37-450f-a8ee-d705cd7f770d" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_NetCashProvidedByUsedInFinancingActivities"/>
    <link:calculationArc order="3" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect_285ba5cb-4143-47dd-92a1-ca70ac006ad4" xlink:to="loc_us-gaap_NetCashProvidedByUsedInFinancingActivities_53f1b156-0c37-450f-a8ee-d705cd7f770d" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EffectOfExchangeRateOnCashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents_01cc5f5d-e09d-4062-84b7-02d43bccd4eb" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_EffectOfExchangeRateOnCashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents"/>
    <link:calculationArc order="4" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect_285ba5cb-4143-47dd-92a1-ca70ac006ad4" xlink:to="loc_us-gaap_EffectOfExchangeRateOnCashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents_01cc5f5d-e09d-4062-84b7-02d43bccd4eb" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_NetCashProvidedByUsedInOperatingActivities_30378590-3d6e-4d4c-a4b8-3726464ce453" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_NetCashProvidedByUsedInOperatingActivities"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncreaseDecreaseInAccountsReceivable_2b778d47-e270-4020-be78-ffdc6d9ee6a8" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_IncreaseDecreaseInAccountsReceivable"/>
    <link:calculationArc order="1" weight="-1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInOperatingActivities_30378590-3d6e-4d4c-a4b8-3726464ce453" xlink:to="loc_us-gaap_IncreaseDecreaseInAccountsReceivable_2b778d47-e270-4020-be78-ffdc6d9ee6a8" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncreaseDecreaseInInventories_bcf3cb06-ca51-4717-9461-2f43ae4c1d77" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_IncreaseDecreaseInInventories"/>
    <link:calculationArc order="2" weight="-1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInOperatingActivities_30378590-3d6e-4d4c-a4b8-3726464ce453" xlink:to="loc_us-gaap_IncreaseDecreaseInInventories_bcf3cb06-ca51-4717-9461-2f43ae4c1d77" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_NetIncomeLoss_08e32986-1f4b-402d-81f6-f60405e771dd" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_NetIncomeLoss"/>
    <link:calculationArc order="3" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInOperatingActivities_30378590-3d6e-4d4c-a4b8-3726464ce453" xlink:to="loc_us-gaap_NetIncomeLoss_08e32986-1f4b-402d-81f6-f60405e771dd" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncreaseDecreaseInAccruedLiabilitiesAndOtherOperatingLiabilities_84bc446e-bcb3-4f4e-ac6f-3975fc0e9f46" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_IncreaseDecreaseInAccruedLiabilitiesAndOtherOperatingLiabilities"/>
    <link:calculationArc order="4" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInOperatingActivities_30378590-3d6e-4d4c-a4b8-3726464ce453" xlink:to="loc_us-gaap_IncreaseDecreaseInAccruedLiabilitiesAndOtherOperatingLiabilities_84bc446e-bcb3-4f4e-ac6f-3975fc0e9f46" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OperatingLeaseRightOfUseAssetAmortizationExpense_82638d9c-a153-4539-a4f4-4d793eb74c2c" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_OperatingLeaseRightOfUseAssetAmortizationExpense"/>
    <link:calculationArc order="5" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInOperatingActivities_30378590-3d6e-4d4c-a4b8-3726464ce453" xlink:to="loc_us-gaap_OperatingLeaseRightOfUseAssetAmortizationExpense_82638d9c-a153-4539-a4f4-4d793eb74c2c" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DepreciationDepletionAndAmortization_7b475143-7b1c-4a55-a10a-d1fb59032d08" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DepreciationDepletionAndAmortization"/>
    <link:calculationArc order="6" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInOperatingActivities_30378590-3d6e-4d4c-a4b8-3726464ce453" xlink:to="loc_us-gaap_DepreciationDepletionAndAmortization_7b475143-7b1c-4a55-a10a-d1fb59032d08" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_InventoryWriteDown_84ebf012-771c-455a-8fdf-b8ca9d3ba16a" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_InventoryWriteDown"/>
    <link:calculationArc order="7" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInOperatingActivities_30378590-3d6e-4d4c-a4b8-3726464ce453" xlink:to="loc_us-gaap_InventoryWriteDown_84ebf012-771c-455a-8fdf-b8ca9d3ba16a" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncreaseDecreaseInPrepaidDeferredExpenseAndOtherAssets_84a51199-af1b-4862-a9fc-1038a8083887" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_IncreaseDecreaseInPrepaidDeferredExpenseAndOtherAssets"/>
    <link:calculationArc order="8" weight="-1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInOperatingActivities_30378590-3d6e-4d4c-a4b8-3726464ce453" xlink:to="loc_us-gaap_IncreaseDecreaseInPrepaidDeferredExpenseAndOtherAssets_84a51199-af1b-4862-a9fc-1038a8083887" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncreaseDecreaseInOperatingLeaseLiability_28d1e5cc-b907-4f71-937c-f4465962cdcd" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_IncreaseDecreaseInOperatingLeaseLiability"/>
    <link:calculationArc order="9" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInOperatingActivities_30378590-3d6e-4d4c-a4b8-3726464ce453" xlink:to="loc_us-gaap_IncreaseDecreaseInOperatingLeaseLiability_28d1e5cc-b907-4f71-937c-f4465962cdcd" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncreaseDecreaseInAccountsPayable_2707c0d8-80cd-4efe-9965-07d7d136a725" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_IncreaseDecreaseInAccountsPayable"/>
    <link:calculationArc order="10" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInOperatingActivities_30378590-3d6e-4d4c-a4b8-3726464ce453" xlink:to="loc_us-gaap_IncreaseDecreaseInAccountsPayable_2707c0d8-80cd-4efe-9965-07d7d136a725" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensation_b9a82094-23f2-4876-94c7-a94b0cbb848d" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ShareBasedCompensation"/>
    <link:calculationArc order="11" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInOperatingActivities_30378590-3d6e-4d4c-a4b8-3726464ce453" xlink:to="loc_us-gaap_ShareBasedCompensation_b9a82094-23f2-4876-94c7-a94b0cbb848d" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FairValueAdjustmentOfWarrants_7a2ef809-f7e4-44c8-8042-50f25a7ca7ae" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_FairValueAdjustmentOfWarrants"/>
    <link:calculationArc order="12" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInOperatingActivities_30378590-3d6e-4d4c-a4b8-3726464ce453" xlink:to="loc_us-gaap_FairValueAdjustmentOfWarrants_7a2ef809-f7e4-44c8-8042-50f25a7ca7ae" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ProvisionForDoubtfulAccounts_9072b2c2-6fd2-4a0e-9bfe-edb4cbe4bb1d" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ProvisionForDoubtfulAccounts"/>
    <link:calculationArc order="13" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInOperatingActivities_30378590-3d6e-4d4c-a4b8-3726464ce453" xlink:to="loc_us-gaap_ProvisionForDoubtfulAccounts_9072b2c2-6fd2-4a0e-9bfe-edb4cbe4bb1d" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_oust_LossOnWriteoffOfAndDisposalOfPropertyAndEquipment_9a67a5db-cdd3-4ebe-b133-ba2862409e9e" xlink:href="oust-20251231.xsd#oust_LossOnWriteoffOfAndDisposalOfPropertyAndEquipment"/>
    <link:calculationArc order="14" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInOperatingActivities_30378590-3d6e-4d4c-a4b8-3726464ce453" xlink:to="loc_oust_LossOnWriteoffOfAndDisposalOfPropertyAndEquipment_9a67a5db-cdd3-4ebe-b133-ba2862409e9e" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AdjustmentOfWarrantsGrantedForServices_b285de62-2e9c-4496-8bed-f1ce1ccf976a" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_AdjustmentOfWarrantsGrantedForServices"/>
    <link:calculationArc order="15" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInOperatingActivities_30378590-3d6e-4d4c-a4b8-3726464ce453" xlink:to="loc_us-gaap_AdjustmentOfWarrantsGrantedForServices_b285de62-2e9c-4496-8bed-f1ce1ccf976a" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncreaseDecreaseInContractWithCustomerLiability_d3fa3157-96fe-4b06-83f1-1540d9790416" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_IncreaseDecreaseInContractWithCustomerLiability"/>
    <link:calculationArc order="16" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInOperatingActivities_30378590-3d6e-4d4c-a4b8-3726464ce453" xlink:to="loc_us-gaap_IncreaseDecreaseInContractWithCustomerLiability_d3fa3157-96fe-4b06-83f1-1540d9790416" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AccretionAmortizationOfDiscountsAndPremiumsInvestments_bae1ca92-271a-4872-a166-f6fa629129ed" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_AccretionAmortizationOfDiscountsAndPremiumsInvestments"/>
    <link:calculationArc order="17" weight="-1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInOperatingActivities_30378590-3d6e-4d4c-a4b8-3726464ce453" xlink:to="loc_us-gaap_AccretionAmortizationOfDiscountsAndPremiumsInvestments_bae1ca92-271a-4872-a166-f6fa629129ed" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_GainLossOnSaleOfInvestments_a36695f5-4116-4b99-9c84-68124fa92c70" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_GainLossOnSaleOfInvestments"/>
    <link:calculationArc order="18" weight="-1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInOperatingActivities_30378590-3d6e-4d4c-a4b8-3726464ce453" xlink:to="loc_us-gaap_GainLossOnSaleOfInvestments_a36695f5-4116-4b99-9c84-68124fa92c70" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_oust_NoncashInterestIncome_8576fa8b-166b-44f8-ba62-7d965479f575" xlink:href="oust-20251231.xsd#oust_NoncashInterestIncome"/>
    <link:calculationArc order="19" weight="-1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInOperatingActivities_30378590-3d6e-4d4c-a4b8-3726464ce453" xlink:to="loc_oust_NoncashInterestIncome_8576fa8b-166b-44f8-ba62-7d965479f575" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_NetCashProvidedByUsedInInvestingActivities_dabc4a73-c69d-4d3d-a651-e96dc10abbf0" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_NetCashProvidedByUsedInInvestingActivities"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ProceedsFromSaleOfPropertyPlantAndEquipment_35e585e7-9620-42ea-a277-dedc0614a3c8" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ProceedsFromSaleOfPropertyPlantAndEquipment"/>
    <link:calculationArc order="1" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInInvestingActivities_dabc4a73-c69d-4d3d-a651-e96dc10abbf0" xlink:to="loc_us-gaap_ProceedsFromSaleOfPropertyPlantAndEquipment_35e585e7-9620-42ea-a277-dedc0614a3c8" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PaymentsToAcquirePropertyPlantAndEquipment_e81308fc-5ef2-4ea4-98f2-b5d564aeb077" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_PaymentsToAcquirePropertyPlantAndEquipment"/>
    <link:calculationArc order="2" weight="-1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInInvestingActivities_dabc4a73-c69d-4d3d-a651-e96dc10abbf0" xlink:to="loc_us-gaap_PaymentsToAcquirePropertyPlantAndEquipment_e81308fc-5ef2-4ea4-98f2-b5d564aeb077" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PaymentsToAcquireShortTermInvestments_04f2bc0f-860a-4a68-bb5e-28bc508ea35a" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_PaymentsToAcquireShortTermInvestments"/>
    <link:calculationArc order="3" weight="-1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInInvestingActivities_dabc4a73-c69d-4d3d-a651-e96dc10abbf0" xlink:to="loc_us-gaap_PaymentsToAcquireShortTermInvestments_04f2bc0f-860a-4a68-bb5e-28bc508ea35a" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ProceedsFromSaleOfShortTermInvestments_eadb0533-95c2-4c4d-b8d5-7bb83f784314" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ProceedsFromSaleOfShortTermInvestments"/>
    <link:calculationArc order="4" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInInvestingActivities_dabc4a73-c69d-4d3d-a651-e96dc10abbf0" xlink:to="loc_us-gaap_ProceedsFromSaleOfShortTermInvestments_eadb0533-95c2-4c4d-b8d5-7bb83f784314" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_NetCashProvidedByUsedInFinancingActivities_ffac4b13-1dd5-46e2-ade5-cbbd68818a0c" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_NetCashProvidedByUsedInFinancingActivities"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ProceedsFromStockOptionsExercised_c63264b7-bff5-4b86-b8c4-26ec251601bc" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ProceedsFromStockOptionsExercised"/>
    <link:calculationArc order="1" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInFinancingActivities_ffac4b13-1dd5-46e2-ade5-cbbd68818a0c" xlink:to="loc_us-gaap_ProceedsFromStockOptionsExercised_c63264b7-bff5-4b86-b8c4-26ec251601bc" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ProceedsFromStockPlans_b466807f-99e3-40cc-b3ac-17d4d4aa7c63" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ProceedsFromStockPlans"/>
    <link:calculationArc order="2" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInFinancingActivities_ffac4b13-1dd5-46e2-ade5-cbbd68818a0c" xlink:to="loc_us-gaap_ProceedsFromStockPlans_b466807f-99e3-40cc-b3ac-17d4d4aa7c63" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_oust_ProceedsFromPaymentsForTaxWithholdingShareBasedPaymentArrangement_af6b5e3e-d1d0-465f-8ada-6087b3e67390" xlink:href="oust-20251231.xsd#oust_ProceedsFromPaymentsForTaxWithholdingShareBasedPaymentArrangement"/>
    <link:calculationArc order="3" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInFinancingActivities_ffac4b13-1dd5-46e2-ade5-cbbd68818a0c" xlink:to="loc_oust_ProceedsFromPaymentsForTaxWithholdingShareBasedPaymentArrangement_af6b5e3e-d1d0-465f-8ada-6087b3e67390" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RepaymentsOfLongTermLinesOfCredit_acb54f82-79c6-43e7-b30b-baa42fb2c420" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_RepaymentsOfLongTermLinesOfCredit"/>
    <link:calculationArc order="4" weight="-1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInFinancingActivities_ffac4b13-1dd5-46e2-ade5-cbbd68818a0c" xlink:to="loc_us-gaap_RepaymentsOfLongTermLinesOfCredit_acb54f82-79c6-43e7-b30b-baa42fb2c420" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_oust_ProceedsFromIssuanceOfCommonStockNetOfIssuanceCosts_3be8a5fa-e837-449f-825f-849699b0cf93" xlink:href="oust-20251231.xsd#oust_ProceedsFromIssuanceOfCommonStockNetOfIssuanceCosts"/>
    <link:calculationArc order="5" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInFinancingActivities_ffac4b13-1dd5-46e2-ade5-cbbd68818a0c" xlink:to="loc_oust_ProceedsFromIssuanceOfCommonStockNetOfIssuanceCosts_3be8a5fa-e837-449f-825f-849699b0cf93" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PaymentsOfStockIssuanceCosts_019c42ad-4d62-79fe-adcd-804015a96ec2" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_PaymentsOfStockIssuanceCosts"/>
    <link:calculationArc order="6" weight="-1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInFinancingActivities_ffac4b13-1dd5-46e2-ade5-cbbd68818a0c" xlink:to="loc_us-gaap_PaymentsOfStockIssuanceCosts_019c42ad-4d62-79fe-adcd-804015a96ec2" xlink:type="arc"/>
  </link:calculationLink>
  <link:roleRef roleURI="http://ouster.com/role/FairValueofFinancialInstrumentsDetails" xlink:type="simple" xlink:href="oust-20251231.xsd#FairValueofFinancialInstrumentsDetails"/>
  <link:calculationLink xlink:role="http://ouster.com/role/FairValueofFinancialInstrumentsDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FinancialLiabilitiesFairValueDisclosure_0eb25529-47c3-41a7-a017-64a6373c3d59" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_FinancialLiabilitiesFairValueDisclosure"/>
    <link:loc xlink:type="locator" xlink:label="loc_oust_ClassOfWarrantOrRightFairValueDisclosure_b1053b58-f743-4358-8ee9-cd59147252a6" xlink:href="oust-20251231.xsd#oust_ClassOfWarrantOrRightFairValueDisclosure"/>
    <link:calculationArc order="1" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_FinancialLiabilitiesFairValueDisclosure_0eb25529-47c3-41a7-a017-64a6373c3d59" xlink:to="loc_oust_ClassOfWarrantOrRightFairValueDisclosure_b1053b58-f743-4358-8ee9-cd59147252a6" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AssetsFairValueDisclosure_105800e0-b543-4308-bfae-70bc924fed9a" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_AssetsFairValueDisclosure"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CashAndCashEquivalentsFairValueDisclosure_fe11ac5b-791c-44ce-b661-5015f896fc4f" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_CashAndCashEquivalentsFairValueDisclosure"/>
    <link:calculationArc order="1" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_AssetsFairValueDisclosure_105800e0-b543-4308-bfae-70bc924fed9a" xlink:to="loc_us-gaap_CashAndCashEquivalentsFairValueDisclosure_fe11ac5b-791c-44ce-b661-5015f896fc4f" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DebtSecuritiesAvailableForSaleExcludingAccruedInterest_4a0ea8e4-f1b1-40f8-82f1-154e8178140d" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DebtSecuritiesAvailableForSaleExcludingAccruedInterest"/>
    <link:calculationArc order="2" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_AssetsFairValueDisclosure_105800e0-b543-4308-bfae-70bc924fed9a" xlink:to="loc_us-gaap_DebtSecuritiesAvailableForSaleExcludingAccruedInterest_4a0ea8e4-f1b1-40f8-82f1-154e8178140d" xlink:type="arc"/>
  </link:calculationLink>
  <link:roleRef roleURI="http://ouster.com/role/BalanceSheetComponentsScheduleofCashandCashEquivalentsDetails" xlink:type="simple" xlink:href="oust-20251231.xsd#BalanceSheetComponentsScheduleofCashandCashEquivalentsDetails"/>
  <link:calculationLink xlink:role="http://ouster.com/role/BalanceSheetComponentsScheduleofCashandCashEquivalentsDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CashAndCashEquivalentsAtCarryingValue_7e9afdaf-5999-4dbe-9f5d-dc764fba594c" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_CashAndCashEquivalentsAtCarryingValue"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_Cash_ebabcd35-f0bb-4776-9f73-5487bec05bf6" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_Cash"/>
    <link:calculationArc order="1" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_CashAndCashEquivalentsAtCarryingValue_7e9afdaf-5999-4dbe-9f5d-dc764fba594c" xlink:to="loc_us-gaap_Cash_ebabcd35-f0bb-4776-9f73-5487bec05bf6" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CashAndCashEquivalentsFairValueDisclosure_4026591d-4a2d-4ae3-b788-9b0d4f6b77f2" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_CashAndCashEquivalentsFairValueDisclosure"/>
    <link:calculationArc order="2" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_CashAndCashEquivalentsAtCarryingValue_7e9afdaf-5999-4dbe-9f5d-dc764fba594c" xlink:to="loc_us-gaap_CashAndCashEquivalentsFairValueDisclosure_4026591d-4a2d-4ae3-b788-9b0d4f6b77f2" xlink:type="arc"/>
  </link:calculationLink>
  <link:roleRef roleURI="http://ouster.com/role/BalanceSheetComponentsScheduleofRestrictedCashDetails" xlink:type="simple" xlink:href="oust-20251231.xsd#BalanceSheetComponentsScheduleofRestrictedCashDetails"/>
  <link:calculationLink xlink:role="http://ouster.com/role/BalanceSheetComponentsScheduleofRestrictedCashDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents_9e694732-87d6-4b56-807d-6880991afc19" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CashAndCashEquivalentsAtCarryingValue_ff697842-fe6d-47ab-82d6-032eff12a8bb" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_CashAndCashEquivalentsAtCarryingValue"/>
    <link:calculationArc order="1" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents_9e694732-87d6-4b56-807d-6880991afc19" xlink:to="loc_us-gaap_CashAndCashEquivalentsAtCarryingValue_ff697842-fe6d-47ab-82d6-032eff12a8bb" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RestrictedCashCurrent_2ba79935-7f4f-41fd-ac1b-53dd76d3639c" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_RestrictedCashCurrent"/>
    <link:calculationArc order="2" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents_9e694732-87d6-4b56-807d-6880991afc19" xlink:to="loc_us-gaap_RestrictedCashCurrent_2ba79935-7f4f-41fd-ac1b-53dd76d3639c" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RestrictedCashNoncurrent_f68fd1d2-fe28-4b50-b581-8f0e8e17dce9" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_RestrictedCashNoncurrent"/>
    <link:calculationArc order="3" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents_9e694732-87d6-4b56-807d-6880991afc19" xlink:to="loc_us-gaap_RestrictedCashNoncurrent_f68fd1d2-fe28-4b50-b581-8f0e8e17dce9" xlink:type="arc"/>
  </link:calculationLink>
  <link:roleRef roleURI="http://ouster.com/role/BalanceSheetComponentsScheduleofInventoryDetails" xlink:type="simple" xlink:href="oust-20251231.xsd#BalanceSheetComponentsScheduleofInventoryDetails"/>
  <link:calculationLink xlink:role="http://ouster.com/role/BalanceSheetComponentsScheduleofInventoryDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_InventoryNet_4a058152-aa16-4ed7-9b07-aab46557f286" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_InventoryNet"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_InventoryWorkInProcessNetOfReserves_8a8a99e2-c6f9-43ed-ad34-2178a1c9e2a4" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_InventoryWorkInProcessNetOfReserves"/>
    <link:calculationArc order="1" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_InventoryNet_4a058152-aa16-4ed7-9b07-aab46557f286" xlink:to="loc_us-gaap_InventoryWorkInProcessNetOfReserves_8a8a99e2-c6f9-43ed-ad34-2178a1c9e2a4" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_InventoryRawMaterialsNetOfReserves_ade9771d-15e0-447c-b918-a5639482d832" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_InventoryRawMaterialsNetOfReserves"/>
    <link:calculationArc order="2" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_InventoryNet_4a058152-aa16-4ed7-9b07-aab46557f286" xlink:to="loc_us-gaap_InventoryRawMaterialsNetOfReserves_ade9771d-15e0-447c-b918-a5639482d832" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_InventoryFinishedGoodsNetOfReserves_1003b33a-ff9b-4fb4-bacf-b3e0a7286261" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_InventoryFinishedGoodsNetOfReserves"/>
    <link:calculationArc order="3" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_InventoryNet_4a058152-aa16-4ed7-9b07-aab46557f286" xlink:to="loc_us-gaap_InventoryFinishedGoodsNetOfReserves_1003b33a-ff9b-4fb4-bacf-b3e0a7286261" xlink:type="arc"/>
  </link:calculationLink>
  <link:roleRef roleURI="http://ouster.com/role/BalanceSheetComponentsScheduleofPrepaidExpensesandOtherCurrentAssetsDetails" xlink:type="simple" xlink:href="oust-20251231.xsd#BalanceSheetComponentsScheduleofPrepaidExpensesandOtherCurrentAssetsDetails"/>
  <link:calculationLink xlink:role="http://ouster.com/role/BalanceSheetComponentsScheduleofPrepaidExpensesandOtherCurrentAssetsDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PrepaidExpenseAndOtherAssetsCurrent_f66b4ab2-30bf-422f-9da1-f2231427874e" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_PrepaidExpenseAndOtherAssetsCurrent"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PrepaidExpenseCurrent_a719d4e3-bbd7-48b6-8f43-d3b2c79ea5de" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_PrepaidExpenseCurrent"/>
    <link:calculationArc order="1" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_PrepaidExpenseAndOtherAssetsCurrent_f66b4ab2-30bf-422f-9da1-f2231427874e" xlink:to="loc_us-gaap_PrepaidExpenseCurrent_a719d4e3-bbd7-48b6-8f43-d3b2c79ea5de" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PrepaidInsurance_f1dbb732-f21f-4622-8ca3-eebddc9c1fd6" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_PrepaidInsurance"/>
    <link:calculationArc order="2" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_PrepaidExpenseAndOtherAssetsCurrent_f66b4ab2-30bf-422f-9da1-f2231427874e" xlink:to="loc_us-gaap_PrepaidInsurance_f1dbb732-f21f-4622-8ca3-eebddc9c1fd6" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_oust_ReceivableFromContractManufacturerCurrent_2d662070-c168-4a35-92be-bbf6035ae39d" xlink:href="oust-20251231.xsd#oust_ReceivableFromContractManufacturerCurrent"/>
    <link:calculationArc order="3" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_PrepaidExpenseAndOtherAssetsCurrent_f66b4ab2-30bf-422f-9da1-f2231427874e" xlink:to="loc_oust_ReceivableFromContractManufacturerCurrent_2d662070-c168-4a35-92be-bbf6035ae39d" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncomeTaxesReceivable_17e8287f-1b81-4c2e-8ddb-813e736613f1" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_IncomeTaxesReceivable"/>
    <link:calculationArc order="4" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_PrepaidExpenseAndOtherAssetsCurrent_f66b4ab2-30bf-422f-9da1-f2231427874e" xlink:to="loc_us-gaap_IncomeTaxesReceivable_17e8287f-1b81-4c2e-8ddb-813e736613f1" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_InsuranceSettlementsReceivableCurrent_05ccb9bf-ee65-468d-afef-357e30df8eaa" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_InsuranceSettlementsReceivableCurrent"/>
    <link:calculationArc order="5" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_PrepaidExpenseAndOtherAssetsCurrent_f66b4ab2-30bf-422f-9da1-f2231427874e" xlink:to="loc_us-gaap_InsuranceSettlementsReceivableCurrent_05ccb9bf-ee65-468d-afef-357e30df8eaa" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherAssetsCurrent_019c418d-420b-7b4e-bda1-de8c35095e0f" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_OtherAssetsCurrent"/>
    <link:calculationArc order="6" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_PrepaidExpenseAndOtherAssetsCurrent_f66b4ab2-30bf-422f-9da1-f2231427874e" xlink:to="loc_us-gaap_OtherAssetsCurrent_019c418d-420b-7b4e-bda1-de8c35095e0f" xlink:type="arc"/>
  </link:calculationLink>
  <link:roleRef roleURI="http://ouster.com/role/BalanceSheetComponentsScheduleofPropertyandEquipmentDetails" xlink:type="simple" xlink:href="oust-20251231.xsd#BalanceSheetComponentsScheduleofPropertyandEquipmentDetails"/>
  <link:calculationLink xlink:role="http://ouster.com/role/BalanceSheetComponentsScheduleofPropertyandEquipmentDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PropertyPlantAndEquipmentNet_96095f04-51ea-4a5b-880e-3894044911c4" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_PropertyPlantAndEquipmentNet"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PropertyPlantAndEquipmentGross_0001bfe3-afa5-4191-82e8-5361abc1a8f0" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_PropertyPlantAndEquipmentGross"/>
    <link:calculationArc order="1" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_PropertyPlantAndEquipmentNet_96095f04-51ea-4a5b-880e-3894044911c4" xlink:to="loc_us-gaap_PropertyPlantAndEquipmentGross_0001bfe3-afa5-4191-82e8-5361abc1a8f0" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment_fc632558-b159-4c7c-8ee9-e90f99fcb386" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment"/>
    <link:calculationArc order="2" weight="-1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_PropertyPlantAndEquipmentNet_96095f04-51ea-4a5b-880e-3894044911c4" xlink:to="loc_us-gaap_AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment_fc632558-b159-4c7c-8ee9-e90f99fcb386" xlink:type="arc"/>
  </link:calculationLink>
  <link:roleRef roleURI="http://ouster.com/role/BalanceSheetComponentsScheduleofAcquiredIntangibleAssetsDetails" xlink:type="simple" xlink:href="oust-20251231.xsd#BalanceSheetComponentsScheduleofAcquiredIntangibleAssetsDetails"/>
  <link:calculationLink xlink:role="http://ouster.com/role/BalanceSheetComponentsScheduleofAcquiredIntangibleAssetsDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FiniteLivedIntangibleAssetsNet_fd473c15-93eb-473d-9956-c1fdbc4ddc16" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_FiniteLivedIntangibleAssetsNet"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FiniteLivedIntangibleAssetsGross_8b41aff2-a0eb-4146-ad23-71e20ff19a0b" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_FiniteLivedIntangibleAssetsGross"/>
    <link:calculationArc order="1" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsNet_fd473c15-93eb-473d-9956-c1fdbc4ddc16" xlink:to="loc_us-gaap_FiniteLivedIntangibleAssetsGross_8b41aff2-a0eb-4146-ad23-71e20ff19a0b" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FiniteLivedIntangibleAssetsAccumulatedAmortization_4d0bee08-a8d3-4d76-bd1c-662b321b148d" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_FiniteLivedIntangibleAssetsAccumulatedAmortization"/>
    <link:calculationArc order="2" weight="-1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsNet_fd473c15-93eb-473d-9956-c1fdbc4ddc16" xlink:to="loc_us-gaap_FiniteLivedIntangibleAssetsAccumulatedAmortization_4d0bee08-a8d3-4d76-bd1c-662b321b148d" xlink:type="arc"/>
  </link:calculationLink>
  <link:roleRef roleURI="http://ouster.com/role/BalanceSheetComponentsScheduleofFiniteLivedIntangibleAssetsFutureAmortizationExpenseDetails" xlink:type="simple" xlink:href="oust-20251231.xsd#BalanceSheetComponentsScheduleofFiniteLivedIntangibleAssetsFutureAmortizationExpenseDetails"/>
  <link:calculationLink xlink:role="http://ouster.com/role/BalanceSheetComponentsScheduleofFiniteLivedIntangibleAssetsFutureAmortizationExpenseDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FiniteLivedIntangibleAssetsNet_e10ce9fd-00eb-426a-b097-4e786dfbd1a6" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_FiniteLivedIntangibleAssetsNet"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseNextTwelveMonths_98f4bf7e-bba5-483f-8b1b-d38b7fc7557c" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseNextTwelveMonths"/>
    <link:calculationArc order="1" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsNet_e10ce9fd-00eb-426a-b097-4e786dfbd1a6" xlink:to="loc_us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseNextTwelveMonths_98f4bf7e-bba5-483f-8b1b-d38b7fc7557c" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearTwo_407be038-fc67-4839-a2c4-082fb2f4b3b8" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearTwo"/>
    <link:calculationArc order="2" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsNet_e10ce9fd-00eb-426a-b097-4e786dfbd1a6" xlink:to="loc_us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearTwo_407be038-fc67-4839-a2c4-082fb2f4b3b8" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearThree_d4e6a7c1-7f88-4e09-9610-b6de2af6a7ac" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearThree"/>
    <link:calculationArc order="3" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsNet_e10ce9fd-00eb-426a-b097-4e786dfbd1a6" xlink:to="loc_us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearThree_d4e6a7c1-7f88-4e09-9610-b6de2af6a7ac" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearFour_7c6c7d92-eadd-4f39-af3a-5fd667a40f1d" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearFour"/>
    <link:calculationArc order="4" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsNet_e10ce9fd-00eb-426a-b097-4e786dfbd1a6" xlink:to="loc_us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearFour_7c6c7d92-eadd-4f39-af3a-5fd667a40f1d" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearFive_ce3784d4-b5ac-4913-a245-31678858f874" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearFive"/>
    <link:calculationArc order="5" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsNet_e10ce9fd-00eb-426a-b097-4e786dfbd1a6" xlink:to="loc_us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearFive_ce3784d4-b5ac-4913-a245-31678858f874" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseAfterYearFive_019b06bc-9c5d-7cce-9581-e9d2ac332416" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseAfterYearFive"/>
    <link:calculationArc order="6" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsNet_e10ce9fd-00eb-426a-b097-4e786dfbd1a6" xlink:to="loc_us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseAfterYearFive_019b06bc-9c5d-7cce-9581-e9d2ac332416" xlink:type="arc"/>
  </link:calculationLink>
  <link:roleRef roleURI="http://ouster.com/role/BalanceSheetComponentsScheduleofAccruedandOtherCurrentLiabilitiesDetails" xlink:type="simple" xlink:href="oust-20251231.xsd#BalanceSheetComponentsScheduleofAccruedandOtherCurrentLiabilitiesDetails"/>
  <link:calculationLink xlink:role="http://ouster.com/role/BalanceSheetComponentsScheduleofAccruedandOtherCurrentLiabilitiesDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_oust_AccruedAndOtherLiabilitiesCurrent_f03f27d8-cfef-4115-bf54-e697e4215968" xlink:href="oust-20251231.xsd#oust_AccruedAndOtherLiabilitiesCurrent"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EmployeeRelatedLiabilitiesCurrent_c6319176-1fd7-46f2-a45f-df24ac783f32" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_EmployeeRelatedLiabilitiesCurrent"/>
    <link:calculationArc order="1" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_oust_AccruedAndOtherLiabilitiesCurrent_f03f27d8-cfef-4115-bf54-e697e4215968" xlink:to="loc_us-gaap_EmployeeRelatedLiabilitiesCurrent_c6319176-1fd7-46f2-a45f-df24ac783f32" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_oust_UninvoicedReceiptsOtherCurrentLiabilities_e595ff10-e2eb-4707-b20a-74310a34078d" xlink:href="oust-20251231.xsd#oust_UninvoicedReceiptsOtherCurrentLiabilities"/>
    <link:calculationArc order="2" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_oust_AccruedAndOtherLiabilitiesCurrent_f03f27d8-cfef-4115-bf54-e697e4215968" xlink:to="loc_oust_UninvoicedReceiptsOtherCurrentLiabilities_e595ff10-e2eb-4707-b20a-74310a34078d" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherAccruedLiabilitiesCurrent_ecbf4b8e-4815-40ad-9e55-e80564181f6d" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_OtherAccruedLiabilitiesCurrent"/>
    <link:calculationArc order="3" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_oust_AccruedAndOtherLiabilitiesCurrent_f03f27d8-cfef-4115-bf54-e697e4215968" xlink:to="loc_us-gaap_OtherAccruedLiabilitiesCurrent_ecbf4b8e-4815-40ad-9e55-e80564181f6d" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LossContingencyAccrualCarryingValueCurrent_b1273586-af2d-489b-a0f0-e9d722142715" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_LossContingencyAccrualCarryingValueCurrent"/>
    <link:calculationArc order="4" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_oust_AccruedAndOtherLiabilitiesCurrent_f03f27d8-cfef-4115-bf54-e697e4215968" xlink:to="loc_us-gaap_LossContingencyAccrualCarryingValueCurrent_b1273586-af2d-489b-a0f0-e9d722142715" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SalesAndExciseTaxPayableCurrent_dd8eaa5a-b368-47d2-b1b8-ae57ecbbce04" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_SalesAndExciseTaxPayableCurrent"/>
    <link:calculationArc order="5" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_oust_AccruedAndOtherLiabilitiesCurrent_f03f27d8-cfef-4115-bf54-e697e4215968" xlink:to="loc_us-gaap_SalesAndExciseTaxPayableCurrent_dd8eaa5a-b368-47d2-b1b8-ae57ecbbce04" xlink:type="arc"/>
  </link:calculationLink>
  <link:roleRef roleURI="http://ouster.com/role/LeasesScheduleofMaturitiesofLeaseLiabilitiesDetails" xlink:type="simple" xlink:href="oust-20251231.xsd#LeasesScheduleofMaturitiesofLeaseLiabilitiesDetails"/>
  <link:calculationLink xlink:role="http://ouster.com/role/LeasesScheduleofMaturitiesofLeaseLiabilitiesDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LesseeOperatingLeaseLiabilityPaymentsDue_df163e83-446c-436b-931c-af24c723d3db" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_LesseeOperatingLeaseLiabilityPaymentsDue"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OperatingLeaseLiability_fa41514e-5653-489e-8c78-9430da9cd763" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_OperatingLeaseLiability"/>
    <link:calculationArc order="1" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_LesseeOperatingLeaseLiabilityPaymentsDue_df163e83-446c-436b-931c-af24c723d3db" xlink:to="loc_us-gaap_OperatingLeaseLiability_fa41514e-5653-489e-8c78-9430da9cd763" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LesseeOperatingLeaseLiabilityUndiscountedExcessAmount_5594966b-5290-47c3-9a51-96e3649c7f9f" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_LesseeOperatingLeaseLiabilityUndiscountedExcessAmount"/>
    <link:calculationArc order="2" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_LesseeOperatingLeaseLiabilityPaymentsDue_df163e83-446c-436b-931c-af24c723d3db" xlink:to="loc_us-gaap_LesseeOperatingLeaseLiabilityUndiscountedExcessAmount_5594966b-5290-47c3-9a51-96e3649c7f9f" xlink:type="arc"/>
  </link:calculationLink>
  <link:roleRef roleURI="http://ouster.com/role/LeasesScheduleofMaturitiesofLeaseLiabilitiesDetails_1" xlink:type="simple" xlink:href="oust-20251231.xsd#LeasesScheduleofMaturitiesofLeaseLiabilitiesDetails_1"/>
  <link:calculationLink xlink:role="http://ouster.com/role/LeasesScheduleofMaturitiesofLeaseLiabilitiesDetails_1" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LesseeOperatingLeaseLiabilityPaymentsDue_d7896db7-78a5-4408-beca-5d3bebe07fad" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_LesseeOperatingLeaseLiabilityPaymentsDue"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LesseeOperatingLeaseLiabilityPaymentsDueYearFive_68d2dc5f-c5b5-4111-bc9a-2653439b9dcf" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_LesseeOperatingLeaseLiabilityPaymentsDueYearFive"/>
    <link:calculationArc order="1" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_LesseeOperatingLeaseLiabilityPaymentsDue_d7896db7-78a5-4408-beca-5d3bebe07fad" xlink:to="loc_us-gaap_LesseeOperatingLeaseLiabilityPaymentsDueYearFive_68d2dc5f-c5b5-4111-bc9a-2653439b9dcf" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LesseeOperatingLeaseLiabilityPaymentsDueNextTwelveMonths_6d52617e-e725-4bad-916e-f2d86282a2ba" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_LesseeOperatingLeaseLiabilityPaymentsDueNextTwelveMonths"/>
    <link:calculationArc order="2" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_LesseeOperatingLeaseLiabilityPaymentsDue_d7896db7-78a5-4408-beca-5d3bebe07fad" xlink:to="loc_us-gaap_LesseeOperatingLeaseLiabilityPaymentsDueNextTwelveMonths_6d52617e-e725-4bad-916e-f2d86282a2ba" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LesseeOperatingLeaseLiabilityPaymentsDueYearTwo_6422d640-cf78-48b1-8857-7d70369135aa" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_LesseeOperatingLeaseLiabilityPaymentsDueYearTwo"/>
    <link:calculationArc order="3" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_LesseeOperatingLeaseLiabilityPaymentsDue_d7896db7-78a5-4408-beca-5d3bebe07fad" xlink:to="loc_us-gaap_LesseeOperatingLeaseLiabilityPaymentsDueYearTwo_6422d640-cf78-48b1-8857-7d70369135aa" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LesseeOperatingLeaseLiabilityPaymentsDueYearThree_8ae27b3d-189a-4c04-934b-24c187053816" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_LesseeOperatingLeaseLiabilityPaymentsDueYearThree"/>
    <link:calculationArc order="4" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_LesseeOperatingLeaseLiabilityPaymentsDue_d7896db7-78a5-4408-beca-5d3bebe07fad" xlink:to="loc_us-gaap_LesseeOperatingLeaseLiabilityPaymentsDueYearThree_8ae27b3d-189a-4c04-934b-24c187053816" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LesseeOperatingLeaseLiabilityPaymentsDueYearFour_a0bfd4c9-a146-4184-9985-c2a4e8d55b36" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_LesseeOperatingLeaseLiabilityPaymentsDueYearFour"/>
    <link:calculationArc order="5" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_LesseeOperatingLeaseLiabilityPaymentsDue_d7896db7-78a5-4408-beca-5d3bebe07fad" xlink:to="loc_us-gaap_LesseeOperatingLeaseLiabilityPaymentsDueYearFour_a0bfd4c9-a146-4184-9985-c2a4e8d55b36" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LesseeOperatingLeaseLiabilityPaymentsDueAfterYearFive_019c41a4-7bb7-746a-a01e-2a52bc963912" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_LesseeOperatingLeaseLiabilityPaymentsDueAfterYearFive"/>
    <link:calculationArc order="6" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_LesseeOperatingLeaseLiabilityPaymentsDue_d7896db7-78a5-4408-beca-5d3bebe07fad" xlink:to="loc_us-gaap_LesseeOperatingLeaseLiabilityPaymentsDueAfterYearFive_019c41a4-7bb7-746a-a01e-2a52bc963912" xlink:type="arc"/>
  </link:calculationLink>
  <link:roleRef roleURI="http://ouster.com/role/IncomeTaxesScheduleofIncomeLossBeforeIncomeTaxDomesticandForeignDetails" xlink:type="simple" xlink:href="oust-20251231.xsd#IncomeTaxesScheduleofIncomeLossBeforeIncomeTaxDomesticandForeignDetails"/>
  <link:calculationLink xlink:role="http://ouster.com/role/IncomeTaxesScheduleofIncomeLossBeforeIncomeTaxDomesticandForeignDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest_9150c16c-d311-4b6f-9d2a-9b4ffff308ec" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesForeign_36cd21b7-b5f6-4794-84d4-de467e1da2d5" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesForeign"/>
    <link:calculationArc order="1" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest_9150c16c-d311-4b6f-9d2a-9b4ffff308ec" xlink:to="loc_us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesForeign_36cd21b7-b5f6-4794-84d4-de467e1da2d5" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesDomestic_20a1e723-b63b-4111-9ceb-a1aa52b340f5" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesDomestic"/>
    <link:calculationArc order="2" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest_9150c16c-d311-4b6f-9d2a-9b4ffff308ec" xlink:to="loc_us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesDomestic_20a1e723-b63b-4111-9ceb-a1aa52b340f5" xlink:type="arc"/>
  </link:calculationLink>
  <link:roleRef roleURI="http://ouster.com/role/IncomeTaxesScheduleofComponentsofIncomeTaxExpenseDetails" xlink:type="simple" xlink:href="oust-20251231.xsd#IncomeTaxesScheduleofComponentsofIncomeTaxExpenseDetails"/>
  <link:calculationLink xlink:role="http://ouster.com/role/IncomeTaxesScheduleofComponentsofIncomeTaxExpenseDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CurrentIncomeTaxExpenseBenefit_6fe7ec2d-80b6-4fed-a2ba-5288c81c108d" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_CurrentIncomeTaxExpenseBenefit"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CurrentFederalTaxExpenseBenefit_5dac1f65-b0d5-42b0-b828-a6d6cf840bf8" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_CurrentFederalTaxExpenseBenefit"/>
    <link:calculationArc order="1" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_CurrentIncomeTaxExpenseBenefit_6fe7ec2d-80b6-4fed-a2ba-5288c81c108d" xlink:to="loc_us-gaap_CurrentFederalTaxExpenseBenefit_5dac1f65-b0d5-42b0-b828-a6d6cf840bf8" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CurrentStateAndLocalTaxExpenseBenefit_f22da010-06bb-44f1-93a9-19cea942fc52" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_CurrentStateAndLocalTaxExpenseBenefit"/>
    <link:calculationArc order="2" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_CurrentIncomeTaxExpenseBenefit_6fe7ec2d-80b6-4fed-a2ba-5288c81c108d" xlink:to="loc_us-gaap_CurrentStateAndLocalTaxExpenseBenefit_f22da010-06bb-44f1-93a9-19cea942fc52" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CurrentForeignTaxExpenseBenefit_54d3551c-ad7f-4480-8072-c2f7ec11d2bb" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_CurrentForeignTaxExpenseBenefit"/>
    <link:calculationArc order="3" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_CurrentIncomeTaxExpenseBenefit_6fe7ec2d-80b6-4fed-a2ba-5288c81c108d" xlink:to="loc_us-gaap_CurrentForeignTaxExpenseBenefit_54d3551c-ad7f-4480-8072-c2f7ec11d2bb" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DeferredIncomeTaxExpenseBenefit_85da84b4-3be3-4eb5-a260-74abecae8ce5" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DeferredIncomeTaxExpenseBenefit"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DeferredFederalIncomeTaxExpenseBenefit_17c9368f-5423-4806-adc6-d17981f27693" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DeferredFederalIncomeTaxExpenseBenefit"/>
    <link:calculationArc order="1" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_DeferredIncomeTaxExpenseBenefit_85da84b4-3be3-4eb5-a260-74abecae8ce5" xlink:to="loc_us-gaap_DeferredFederalIncomeTaxExpenseBenefit_17c9368f-5423-4806-adc6-d17981f27693" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DeferredStateAndLocalIncomeTaxExpenseBenefit_5787868c-6405-4acd-a536-5b500e3c56e5" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DeferredStateAndLocalIncomeTaxExpenseBenefit"/>
    <link:calculationArc order="2" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_DeferredIncomeTaxExpenseBenefit_85da84b4-3be3-4eb5-a260-74abecae8ce5" xlink:to="loc_us-gaap_DeferredStateAndLocalIncomeTaxExpenseBenefit_5787868c-6405-4acd-a536-5b500e3c56e5" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DeferredForeignIncomeTaxExpenseBenefit_019b096e-e895-7f16-802f-01ebbf7b5996" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DeferredForeignIncomeTaxExpenseBenefit"/>
    <link:calculationArc order="3" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_DeferredIncomeTaxExpenseBenefit_85da84b4-3be3-4eb5-a260-74abecae8ce5" xlink:to="loc_us-gaap_DeferredForeignIncomeTaxExpenseBenefit_019b096e-e895-7f16-802f-01ebbf7b5996" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncomeTaxExpenseBenefit_2d7f8dd1-ef66-47c4-9289-a4853bd36bce" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_IncomeTaxExpenseBenefit"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DeferredIncomeTaxExpenseBenefit_d17483d0-b228-45e6-b79d-58c694e33c3e" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DeferredIncomeTaxExpenseBenefit"/>
    <link:calculationArc order="1" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_IncomeTaxExpenseBenefit_2d7f8dd1-ef66-47c4-9289-a4853bd36bce" xlink:to="loc_us-gaap_DeferredIncomeTaxExpenseBenefit_d17483d0-b228-45e6-b79d-58c694e33c3e" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CurrentIncomeTaxExpenseBenefit_c4819c4d-1b54-44d1-999e-251b30368b65" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_CurrentIncomeTaxExpenseBenefit"/>
    <link:calculationArc order="2" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_IncomeTaxExpenseBenefit_2d7f8dd1-ef66-47c4-9289-a4853bd36bce" xlink:to="loc_us-gaap_CurrentIncomeTaxExpenseBenefit_c4819c4d-1b54-44d1-999e-251b30368b65" xlink:type="arc"/>
  </link:calculationLink>
  <link:roleRef roleURI="http://ouster.com/role/IncomeTaxesScheduleofEffectiveIncomeTaxRateReconciliationDetails" xlink:type="simple" xlink:href="oust-20251231.xsd#IncomeTaxesScheduleofEffectiveIncomeTaxRateReconciliationDetails"/>
  <link:calculationLink xlink:role="http://ouster.com/role/IncomeTaxesScheduleofEffectiveIncomeTaxRateReconciliationDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncomeTaxExpenseBenefit_019b0975-7054-7ab3-80ba-fa8242b6fea3" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_IncomeTaxExpenseBenefit"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncomeTaxReconciliationIncomeTaxExpenseBenefitAtFederalStatutoryIncomeTaxRate_019b0975-7054-75ad-9202-61c38e3e0914" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_IncomeTaxReconciliationIncomeTaxExpenseBenefitAtFederalStatutoryIncomeTaxRate"/>
    <link:calculationArc order="1" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_IncomeTaxExpenseBenefit_019b0975-7054-7ab3-80ba-fa8242b6fea3" xlink:to="loc_us-gaap_IncomeTaxReconciliationIncomeTaxExpenseBenefitAtFederalStatutoryIncomeTaxRate_019b0975-7054-75ad-9202-61c38e3e0914" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncomeTaxReconciliationStateAndLocalIncomeTaxes_019b0975-7054-77bb-b0fa-905ebcf36a8e" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_IncomeTaxReconciliationStateAndLocalIncomeTaxes"/>
    <link:calculationArc order="2" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_IncomeTaxExpenseBenefit_019b0975-7054-7ab3-80ba-fa8242b6fea3" xlink:to="loc_us-gaap_IncomeTaxReconciliationStateAndLocalIncomeTaxes_019b0975-7054-77bb-b0fa-905ebcf36a8e" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncomeTaxReconciliationForeignIncomeTaxRateDifferential_019b0975-7054-702c-b809-734b32b301dd" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_IncomeTaxReconciliationForeignIncomeTaxRateDifferential"/>
    <link:calculationArc order="3" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_IncomeTaxExpenseBenefit_019b0975-7054-7ab3-80ba-fa8242b6fea3" xlink:to="loc_us-gaap_IncomeTaxReconciliationForeignIncomeTaxRateDifferential_019b0975-7054-702c-b809-734b32b301dd" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EffectiveIncomeTaxRateReconciliationGiltiAmount_019b0975-7054-7694-92d0-ea763bcdd1a7" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_EffectiveIncomeTaxRateReconciliationGiltiAmount"/>
    <link:calculationArc order="4" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_IncomeTaxExpenseBenefit_019b0975-7054-7ab3-80ba-fa8242b6fea3" xlink:to="loc_us-gaap_EffectiveIncomeTaxRateReconciliationGiltiAmount_019b0975-7054-7694-92d0-ea763bcdd1a7" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EffectiveIncomeTaxRateReconciliationCrossBorderOtherAmount_019b0975-7054-7a04-ab93-790dfc8c7199" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_EffectiveIncomeTaxRateReconciliationCrossBorderOtherAmount"/>
    <link:calculationArc order="5" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_IncomeTaxExpenseBenefit_019b0975-7054-7ab3-80ba-fa8242b6fea3" xlink:to="loc_us-gaap_EffectiveIncomeTaxRateReconciliationCrossBorderOtherAmount_019b0975-7054-7a04-ab93-790dfc8c7199" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncomeTaxReconciliationTaxCreditsResearch_019b0975-7054-73af-b386-7d590b023c1a" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_IncomeTaxReconciliationTaxCreditsResearch"/>
    <link:calculationArc order="6" weight="-1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_IncomeTaxExpenseBenefit_019b0975-7054-7ab3-80ba-fa8242b6fea3" xlink:to="loc_us-gaap_IncomeTaxReconciliationTaxCreditsResearch_019b0975-7054-73af-b386-7d590b023c1a" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncomeTaxReconciliationChangeInDeferredTaxAssetsValuationAllowance_019b0975-7054-7cee-8a97-e3a1636d1526" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_IncomeTaxReconciliationChangeInDeferredTaxAssetsValuationAllowance"/>
    <link:calculationArc order="7" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_IncomeTaxExpenseBenefit_019b0975-7054-7ab3-80ba-fa8242b6fea3" xlink:to="loc_us-gaap_IncomeTaxReconciliationChangeInDeferredTaxAssetsValuationAllowance_019b0975-7054-7cee-8a97-e3a1636d1526" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncomeTaxReconciliationNondeductibleExpenseShareBasedCompensationCost_019b0975-7054-7150-b3c6-b9a8f59534f1" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_IncomeTaxReconciliationNondeductibleExpenseShareBasedCompensationCost"/>
    <link:calculationArc order="8" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_IncomeTaxExpenseBenefit_019b0975-7054-7ab3-80ba-fa8242b6fea3" xlink:to="loc_us-gaap_IncomeTaxReconciliationNondeductibleExpenseShareBasedCompensationCost_019b0975-7054-7150-b3c6-b9a8f59534f1" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncomeTaxReconciliationNondeductibleExpenseOther_019b0975-7054-794a-953e-6d49087c1172" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_IncomeTaxReconciliationNondeductibleExpenseOther"/>
    <link:calculationArc order="9" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_IncomeTaxExpenseBenefit_019b0975-7054-7ab3-80ba-fa8242b6fea3" xlink:to="loc_us-gaap_IncomeTaxReconciliationNondeductibleExpenseOther_019b0975-7054-794a-953e-6d49087c1172" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncomeTaxReconciliationTaxContingencies_019c41d2-c594-7809-8ab7-d0b395a34a10" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_IncomeTaxReconciliationTaxContingencies"/>
    <link:calculationArc order="10" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_IncomeTaxExpenseBenefit_019b0975-7054-7ab3-80ba-fa8242b6fea3" xlink:to="loc_us-gaap_IncomeTaxReconciliationTaxContingencies_019c41d2-c594-7809-8ab7-d0b395a34a10" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncomeTaxReconciliationTaxSettlementsDomestic_019c41d2-c594-7ffd-830c-e330d3a3929e" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_IncomeTaxReconciliationTaxSettlementsDomestic"/>
    <link:calculationArc order="11" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_IncomeTaxExpenseBenefit_019b0975-7054-7ab3-80ba-fa8242b6fea3" xlink:to="loc_us-gaap_IncomeTaxReconciliationTaxSettlementsDomestic_019c41d2-c594-7ffd-830c-e330d3a3929e" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncomeTaxReconciliationPriorYearIncomeTaxes_019c6bf5-c8aa-7f2c-980c-d88f497a7aaf" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_IncomeTaxReconciliationPriorYearIncomeTaxes"/>
    <link:calculationArc order="12" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_IncomeTaxExpenseBenefit_019b0975-7054-7ab3-80ba-fa8242b6fea3" xlink:to="loc_us-gaap_IncomeTaxReconciliationPriorYearIncomeTaxes_019c6bf5-c8aa-7f2c-980c-d88f497a7aaf" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncomeTaxReconciliationOtherAdjustments_019c6bf5-c8aa-7713-afcc-f841c89ee3d8" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_IncomeTaxReconciliationOtherAdjustments"/>
    <link:calculationArc order="13" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_IncomeTaxExpenseBenefit_019b0975-7054-7ab3-80ba-fa8242b6fea3" xlink:to="loc_us-gaap_IncomeTaxReconciliationOtherAdjustments_019c6bf5-c8aa-7713-afcc-f841c89ee3d8" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EffectiveIncomeTaxRateReconciliationShareBasedCompensationExcessTaxBenefitAmount_019c6bf5-c8aa-7358-a277-f6957ce61861" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_EffectiveIncomeTaxRateReconciliationShareBasedCompensationExcessTaxBenefitAmount"/>
    <link:calculationArc order="14" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_IncomeTaxExpenseBenefit_019b0975-7054-7ab3-80ba-fa8242b6fea3" xlink:to="loc_us-gaap_EffectiveIncomeTaxRateReconciliationShareBasedCompensationExcessTaxBenefitAmount_019c6bf5-c8aa-7358-a277-f6957ce61861" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_oust_EffectiveIncomeTaxRateReconciliationChangesInWarrantFairValueAmount_019c6bf5-c8aa-7a3f-96e2-a35c0905ad4a" xlink:href="oust-20251231.xsd#oust_EffectiveIncomeTaxRateReconciliationChangesInWarrantFairValueAmount"/>
    <link:calculationArc order="15" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_IncomeTaxExpenseBenefit_019b0975-7054-7ab3-80ba-fa8242b6fea3" xlink:to="loc_oust_EffectiveIncomeTaxRateReconciliationChangesInWarrantFairValueAmount_019c6bf5-c8aa-7a3f-96e2-a35c0905ad4a" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncomeTaxReconciliationNondeductibleExpense_019c6bf5-c8aa-74f4-8187-b87f62eed08c" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_IncomeTaxReconciliationNondeductibleExpense"/>
    <link:calculationArc order="16" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_IncomeTaxExpenseBenefit_019b0975-7054-7ab3-80ba-fa8242b6fea3" xlink:to="loc_us-gaap_IncomeTaxReconciliationNondeductibleExpense_019c6bf5-c8aa-74f4-8187-b87f62eed08c" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EffectiveIncomeTaxRateContinuingOperations_019b0975-cd98-73cc-a064-d5c5bc73fa92" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_EffectiveIncomeTaxRateContinuingOperations"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EffectiveIncomeTaxRateReconciliationAtFederalStatutoryIncomeTaxRate_019b0975-cd98-7dd2-aa6b-8a191035b054" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_EffectiveIncomeTaxRateReconciliationAtFederalStatutoryIncomeTaxRate"/>
    <link:calculationArc order="1" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_EffectiveIncomeTaxRateContinuingOperations_019b0975-cd98-73cc-a064-d5c5bc73fa92" xlink:to="loc_us-gaap_EffectiveIncomeTaxRateReconciliationAtFederalStatutoryIncomeTaxRate_019b0975-cd98-7dd2-aa6b-8a191035b054" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EffectiveIncomeTaxRateReconciliationStateAndLocalIncomeTaxes_019b0975-cd98-797a-9f0c-02883ac98b10" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_EffectiveIncomeTaxRateReconciliationStateAndLocalIncomeTaxes"/>
    <link:calculationArc order="2" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_EffectiveIncomeTaxRateContinuingOperations_019b0975-cd98-73cc-a064-d5c5bc73fa92" xlink:to="loc_us-gaap_EffectiveIncomeTaxRateReconciliationStateAndLocalIncomeTaxes_019b0975-cd98-797a-9f0c-02883ac98b10" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EffectiveIncomeTaxRateReconciliationForeignIncomeTaxRateDifferential_019c971a-ef03-705a-95f7-17a4203bc570" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_EffectiveIncomeTaxRateReconciliationForeignIncomeTaxRateDifferential"/>
    <link:calculationArc order="3" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_EffectiveIncomeTaxRateContinuingOperations_019b0975-cd98-73cc-a064-d5c5bc73fa92" xlink:to="loc_us-gaap_EffectiveIncomeTaxRateReconciliationForeignIncomeTaxRateDifferential_019c971a-ef03-705a-95f7-17a4203bc570" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EffectiveIncomeTaxRateReconciliationGiltiPercent_019b0975-cd98-7e1d-892c-fdf2eecb37e4" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_EffectiveIncomeTaxRateReconciliationGiltiPercent"/>
    <link:calculationArc order="4" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_EffectiveIncomeTaxRateContinuingOperations_019b0975-cd98-73cc-a064-d5c5bc73fa92" xlink:to="loc_us-gaap_EffectiveIncomeTaxRateReconciliationGiltiPercent_019b0975-cd98-7e1d-892c-fdf2eecb37e4" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EffectiveIncomeTaxRateReconciliationCrossBorderOtherPercent_019b0975-cd98-7446-a424-c798180377cc" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_EffectiveIncomeTaxRateReconciliationCrossBorderOtherPercent"/>
    <link:calculationArc order="5" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_EffectiveIncomeTaxRateContinuingOperations_019b0975-cd98-73cc-a064-d5c5bc73fa92" xlink:to="loc_us-gaap_EffectiveIncomeTaxRateReconciliationCrossBorderOtherPercent_019b0975-cd98-7446-a424-c798180377cc" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EffectiveIncomeTaxRateReconciliationTaxCreditsResearch_019b0975-cd98-7888-86b6-a784849b7a1a" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_EffectiveIncomeTaxRateReconciliationTaxCreditsResearch"/>
    <link:calculationArc order="6" weight="-1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_EffectiveIncomeTaxRateContinuingOperations_019b0975-cd98-73cc-a064-d5c5bc73fa92" xlink:to="loc_us-gaap_EffectiveIncomeTaxRateReconciliationTaxCreditsResearch_019b0975-cd98-7888-86b6-a784849b7a1a" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EffectiveIncomeTaxRateReconciliationChangeInDeferredTaxAssetsValuationAllowance_019b0975-cd98-7e33-8437-4598f2e7eff1" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_EffectiveIncomeTaxRateReconciliationChangeInDeferredTaxAssetsValuationAllowance"/>
    <link:calculationArc order="7" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_EffectiveIncomeTaxRateContinuingOperations_019b0975-cd98-73cc-a064-d5c5bc73fa92" xlink:to="loc_us-gaap_EffectiveIncomeTaxRateReconciliationChangeInDeferredTaxAssetsValuationAllowance_019b0975-cd98-7e33-8437-4598f2e7eff1" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EffectiveIncomeTaxRateReconciliationNondeductibleExpenseShareBasedCompensationCost_019b0975-cd98-72ad-bc3f-660c83ee38e1" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_EffectiveIncomeTaxRateReconciliationNondeductibleExpenseShareBasedCompensationCost"/>
    <link:calculationArc order="8" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_EffectiveIncomeTaxRateContinuingOperations_019b0975-cd98-73cc-a064-d5c5bc73fa92" xlink:to="loc_us-gaap_EffectiveIncomeTaxRateReconciliationNondeductibleExpenseShareBasedCompensationCost_019b0975-cd98-72ad-bc3f-660c83ee38e1" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EffectiveIncomeTaxRateReconciliationNondeductibleExpenseOther_019b0975-cd98-73af-a8a9-e8477c022e98" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_EffectiveIncomeTaxRateReconciliationNondeductibleExpenseOther"/>
    <link:calculationArc order="9" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_EffectiveIncomeTaxRateContinuingOperations_019b0975-cd98-73cc-a064-d5c5bc73fa92" xlink:to="loc_us-gaap_EffectiveIncomeTaxRateReconciliationNondeductibleExpenseOther_019b0975-cd98-73af-a8a9-e8477c022e98" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EffectiveIncomeTaxRateReconciliationTaxContingencies_019b0975-cd98-73af-8f67-67ba6f9a2cea" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_EffectiveIncomeTaxRateReconciliationTaxContingencies"/>
    <link:calculationArc order="10" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_EffectiveIncomeTaxRateContinuingOperations_019b0975-cd98-73cc-a064-d5c5bc73fa92" xlink:to="loc_us-gaap_EffectiveIncomeTaxRateReconciliationTaxContingencies_019b0975-cd98-73af-8f67-67ba6f9a2cea" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EffectiveIncomeTaxRateReconciliationTaxSettlementsDomestic_019c9a9d-df54-74bf-bb7f-4903f58f0d4b" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_EffectiveIncomeTaxRateReconciliationTaxSettlementsDomestic"/>
    <link:calculationArc order="11" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_EffectiveIncomeTaxRateContinuingOperations_019b0975-cd98-73cc-a064-d5c5bc73fa92" xlink:to="loc_us-gaap_EffectiveIncomeTaxRateReconciliationTaxSettlementsDomestic_019c9a9d-df54-74bf-bb7f-4903f58f0d4b" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EffectiveIncomeTaxRateReconciliationPriorYearIncomeTaxes_019c6be5-05db-7b5f-bec2-b1ea8beb6d6c" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_EffectiveIncomeTaxRateReconciliationPriorYearIncomeTaxes"/>
    <link:calculationArc order="12" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_EffectiveIncomeTaxRateContinuingOperations_019b0975-cd98-73cc-a064-d5c5bc73fa92" xlink:to="loc_us-gaap_EffectiveIncomeTaxRateReconciliationPriorYearIncomeTaxes_019c6be5-05db-7b5f-bec2-b1ea8beb6d6c" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EffectiveIncomeTaxRateReconciliationOtherAdjustments_019c6be5-05db-7445-af26-0794ecc6530c" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_EffectiveIncomeTaxRateReconciliationOtherAdjustments"/>
    <link:calculationArc order="13" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_EffectiveIncomeTaxRateContinuingOperations_019b0975-cd98-73cc-a064-d5c5bc73fa92" xlink:to="loc_us-gaap_EffectiveIncomeTaxRateReconciliationOtherAdjustments_019c6be5-05db-7445-af26-0794ecc6530c" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EffectiveIncomeTaxRateReconciliationShareBasedCompensationExcessTaxBenefitPercent_019c6be5-05db-74a1-a54b-17c4c8ced865" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_EffectiveIncomeTaxRateReconciliationShareBasedCompensationExcessTaxBenefitPercent"/>
    <link:calculationArc order="14" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_EffectiveIncomeTaxRateContinuingOperations_019b0975-cd98-73cc-a064-d5c5bc73fa92" xlink:to="loc_us-gaap_EffectiveIncomeTaxRateReconciliationShareBasedCompensationExcessTaxBenefitPercent_019c6be5-05db-74a1-a54b-17c4c8ced865" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_oust_EffectiveIncomeTaxRateReconciliationChangesInWarrantFairValuePercent_019c6be5-05db-756a-91e4-309f18c5c858" xlink:href="oust-20251231.xsd#oust_EffectiveIncomeTaxRateReconciliationChangesInWarrantFairValuePercent"/>
    <link:calculationArc order="15" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_EffectiveIncomeTaxRateContinuingOperations_019b0975-cd98-73cc-a064-d5c5bc73fa92" xlink:to="loc_oust_EffectiveIncomeTaxRateReconciliationChangesInWarrantFairValuePercent_019c6be5-05db-756a-91e4-309f18c5c858" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EffectiveIncomeTaxRateReconciliationNondeductibleExpense_019c6beb-586e-7d9d-af8f-c6e1181c687b" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_EffectiveIncomeTaxRateReconciliationNondeductibleExpense"/>
    <link:calculationArc order="16" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_EffectiveIncomeTaxRateContinuingOperations_019b0975-cd98-73cc-a064-d5c5bc73fa92" xlink:to="loc_us-gaap_EffectiveIncomeTaxRateReconciliationNondeductibleExpense_019c6beb-586e-7d9d-af8f-c6e1181c687b" xlink:type="arc"/>
  </link:calculationLink>
  <link:roleRef roleURI="http://ouster.com/role/IncomeTaxesScheduleofDeferredTaxAssetsandLiabilitiesDetails" xlink:type="simple" xlink:href="oust-20251231.xsd#IncomeTaxesScheduleofDeferredTaxAssetsandLiabilitiesDetails"/>
  <link:calculationLink xlink:role="http://ouster.com/role/IncomeTaxesScheduleofDeferredTaxAssetsandLiabilitiesDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DeferredTaxAssetsLiabilitiesNet_13816935-a86d-42a3-b72c-607a0c52af5a" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DeferredTaxAssetsLiabilitiesNet"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DeferredIncomeTaxLiabilities_3c606342-94a0-49ae-90bd-d6ccc23a9ace" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DeferredIncomeTaxLiabilities"/>
    <link:calculationArc order="1" weight="-1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_DeferredTaxAssetsLiabilitiesNet_13816935-a86d-42a3-b72c-607a0c52af5a" xlink:to="loc_us-gaap_DeferredIncomeTaxLiabilities_3c606342-94a0-49ae-90bd-d6ccc23a9ace" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DeferredTaxAssetsNet_379e050e-38f9-426d-977f-a235354b72f2" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DeferredTaxAssetsNet"/>
    <link:calculationArc order="2" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_DeferredTaxAssetsLiabilitiesNet_13816935-a86d-42a3-b72c-607a0c52af5a" xlink:to="loc_us-gaap_DeferredTaxAssetsNet_379e050e-38f9-426d-977f-a235354b72f2" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DeferredTaxAssetsGross_e6c08dfa-4997-468a-a7c5-1cd581fdfc56" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DeferredTaxAssetsGross"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DeferredTaxAssetsOperatingLossCarryforwards_89912c77-bca3-465b-80ee-1f132510dda8" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DeferredTaxAssetsOperatingLossCarryforwards"/>
    <link:calculationArc order="1" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_DeferredTaxAssetsGross_e6c08dfa-4997-468a-a7c5-1cd581fdfc56" xlink:to="loc_us-gaap_DeferredTaxAssetsOperatingLossCarryforwards_89912c77-bca3-465b-80ee-1f132510dda8" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DeferredTaxAssetsTaxCreditCarryforwards_6fc8aa15-2524-426f-a705-83c35494a1ea" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DeferredTaxAssetsTaxCreditCarryforwards"/>
    <link:calculationArc order="2" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_DeferredTaxAssetsGross_e6c08dfa-4997-468a-a7c5-1cd581fdfc56" xlink:to="loc_us-gaap_DeferredTaxAssetsTaxCreditCarryforwards_6fc8aa15-2524-426f-a705-83c35494a1ea" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DeferredTaxAssetsTaxDeferredExpenseReservesAndAccruals_2ad1c951-4b48-4150-987c-aeddf1fcd47c" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DeferredTaxAssetsTaxDeferredExpenseReservesAndAccruals"/>
    <link:calculationArc order="3" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_DeferredTaxAssetsGross_e6c08dfa-4997-468a-a7c5-1cd581fdfc56" xlink:to="loc_us-gaap_DeferredTaxAssetsTaxDeferredExpenseReservesAndAccruals_2ad1c951-4b48-4150-987c-aeddf1fcd47c" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DeferredTaxAssetsTaxDeferredExpenseCompensationAndBenefitsShareBasedCompensationCost_7f7e5e4f-4148-48e4-b76a-cf2d66323ede" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DeferredTaxAssetsTaxDeferredExpenseCompensationAndBenefitsShareBasedCompensationCost"/>
    <link:calculationArc order="4" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_DeferredTaxAssetsGross_e6c08dfa-4997-468a-a7c5-1cd581fdfc56" xlink:to="loc_us-gaap_DeferredTaxAssetsTaxDeferredExpenseCompensationAndBenefitsShareBasedCompensationCost_7f7e5e4f-4148-48e4-b76a-cf2d66323ede" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DeferredTaxAssetsPropertyPlantAndEquipment_3deb56f4-6c90-4dd5-9217-0eae6865519d" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DeferredTaxAssetsPropertyPlantAndEquipment"/>
    <link:calculationArc order="5" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_DeferredTaxAssetsGross_e6c08dfa-4997-468a-a7c5-1cd581fdfc56" xlink:to="loc_us-gaap_DeferredTaxAssetsPropertyPlantAndEquipment_3deb56f4-6c90-4dd5-9217-0eae6865519d" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_oust_DeferredTaxAssetsOperatingLeaseLiability_4be6633f-2ef7-43fa-a690-a71763a6da7f" xlink:href="oust-20251231.xsd#oust_DeferredTaxAssetsOperatingLeaseLiability"/>
    <link:calculationArc order="6" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_DeferredTaxAssetsGross_e6c08dfa-4997-468a-a7c5-1cd581fdfc56" xlink:to="loc_oust_DeferredTaxAssetsOperatingLeaseLiability_4be6633f-2ef7-43fa-a690-a71763a6da7f" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_oust_DeferredTaxAssetsCapitalizedResearchAndDevelopmentCost_47612754-7184-4b94-b7db-be78724f3a21" xlink:href="oust-20251231.xsd#oust_DeferredTaxAssetsCapitalizedResearchAndDevelopmentCost"/>
    <link:calculationArc order="7" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_DeferredTaxAssetsGross_e6c08dfa-4997-468a-a7c5-1cd581fdfc56" xlink:to="loc_oust_DeferredTaxAssetsCapitalizedResearchAndDevelopmentCost_47612754-7184-4b94-b7db-be78724f3a21" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DeferredTaxAssetsDeferredIncome_8cf2ed3d-6904-4977-b63f-275cc0b342be" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DeferredTaxAssetsDeferredIncome"/>
    <link:calculationArc order="8" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_DeferredTaxAssetsGross_e6c08dfa-4997-468a-a7c5-1cd581fdfc56" xlink:to="loc_us-gaap_DeferredTaxAssetsDeferredIncome_8cf2ed3d-6904-4977-b63f-275cc0b342be" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DeferredTaxAssetsNet_0fa3bb84-ca59-4744-b1b6-ae6307847e3b" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DeferredTaxAssetsNet"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DeferredTaxAssetsValuationAllowance_1c46bdc8-0dc4-48b1-b73f-5eaa761149a4" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DeferredTaxAssetsValuationAllowance"/>
    <link:calculationArc order="1" weight="-1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_DeferredTaxAssetsNet_0fa3bb84-ca59-4744-b1b6-ae6307847e3b" xlink:to="loc_us-gaap_DeferredTaxAssetsValuationAllowance_1c46bdc8-0dc4-48b1-b73f-5eaa761149a4" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DeferredTaxAssetsGross_f776d0d6-3a63-456f-9f82-ae3ffd023a5c" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DeferredTaxAssetsGross"/>
    <link:calculationArc order="2" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_DeferredTaxAssetsNet_0fa3bb84-ca59-4744-b1b6-ae6307847e3b" xlink:to="loc_us-gaap_DeferredTaxAssetsGross_f776d0d6-3a63-456f-9f82-ae3ffd023a5c" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DeferredIncomeTaxLiabilities_a3bfb4e2-0216-4432-a1f5-0758ed2fe82a" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DeferredIncomeTaxLiabilities"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DeferredTaxLiabilitiesPropertyPlantAndEquipment_ad35d9e4-e3c8-4c80-a620-9dccc84f1ddd" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DeferredTaxLiabilitiesPropertyPlantAndEquipment"/>
    <link:calculationArc order="1" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_DeferredIncomeTaxLiabilities_a3bfb4e2-0216-4432-a1f5-0758ed2fe82a" xlink:to="loc_us-gaap_DeferredTaxLiabilitiesPropertyPlantAndEquipment_ad35d9e4-e3c8-4c80-a620-9dccc84f1ddd" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DeferredTaxLiabilitiesGoodwillAndIntangibleAssetsIntangibleAssets_1dd81945-f712-45fb-aaa3-325f3a81208e" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DeferredTaxLiabilitiesGoodwillAndIntangibleAssetsIntangibleAssets"/>
    <link:calculationArc order="2" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_DeferredIncomeTaxLiabilities_a3bfb4e2-0216-4432-a1f5-0758ed2fe82a" xlink:to="loc_us-gaap_DeferredTaxLiabilitiesGoodwillAndIntangibleAssetsIntangibleAssets_1dd81945-f712-45fb-aaa3-325f3a81208e" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_oust_DeferredTaxLiabilitiesOperatingLeaseRightOfUseAssets_019c6bbe-a9d9-7b96-bbe4-65a92338d370" xlink:href="oust-20251231.xsd#oust_DeferredTaxLiabilitiesOperatingLeaseRightOfUseAssets"/>
    <link:calculationArc order="3" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_DeferredIncomeTaxLiabilities_a3bfb4e2-0216-4432-a1f5-0758ed2fe82a" xlink:to="loc_oust_DeferredTaxLiabilitiesOperatingLeaseRightOfUseAssets_019c6bbe-a9d9-7b96-bbe4-65a92338d370" xlink:type="arc"/>
  </link:calculationLink>
  <link:roleRef roleURI="http://ouster.com/role/IncomeTaxesScheduleofNetCashPaidRefundsReceivedforIncomeTaxesDetails" xlink:type="simple" xlink:href="oust-20251231.xsd#IncomeTaxesScheduleofNetCashPaidRefundsReceivedforIncomeTaxesDetails"/>
  <link:calculationLink xlink:role="http://ouster.com/role/IncomeTaxesScheduleofNetCashPaidRefundsReceivedforIncomeTaxesDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncomeTaxesPaidNet_019b098d-7f58-72db-b5ab-759db83f9044" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_IncomeTaxesPaidNet"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncomeTaxPaidFederalAfterRefundReceived_019b098d-7f58-752a-bbac-a247aec98b72" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_IncomeTaxPaidFederalAfterRefundReceived"/>
    <link:calculationArc order="1" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_IncomeTaxesPaidNet_019b098d-7f58-72db-b5ab-759db83f9044" xlink:to="loc_us-gaap_IncomeTaxPaidFederalAfterRefundReceived_019b098d-7f58-752a-bbac-a247aec98b72" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncomeTaxPaidStateAndLocalAfterRefundReceived_019b098d-7f58-7515-abba-4b4f177e2c29" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_IncomeTaxPaidStateAndLocalAfterRefundReceived"/>
    <link:calculationArc order="2" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_IncomeTaxesPaidNet_019b098d-7f58-72db-b5ab-759db83f9044" xlink:to="loc_us-gaap_IncomeTaxPaidStateAndLocalAfterRefundReceived_019b098d-7f58-7515-abba-4b4f177e2c29" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncomeTaxPaidForeignAfterRefundReceived_019b098d-7f58-7f6b-96a9-f0d8f63d425c" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_IncomeTaxPaidForeignAfterRefundReceived"/>
    <link:calculationArc order="3" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_IncomeTaxesPaidNet_019b098d-7f58-72db-b5ab-759db83f9044" xlink:to="loc_us-gaap_IncomeTaxPaidForeignAfterRefundReceived_019b098d-7f58-7f6b-96a9-f0d8f63d425c" xlink:type="arc"/>
  </link:calculationLink>
  <link:roleRef roleURI="http://ouster.com/role/RevenueScheduleofContractLiabilitiesDetails" xlink:type="simple" xlink:href="oust-20251231.xsd#RevenueScheduleofContractLiabilitiesDetails"/>
  <link:calculationLink xlink:role="http://ouster.com/role/RevenueScheduleofContractLiabilitiesDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ContractWithCustomerLiability_2863d5c2-4bbd-4ef4-94b5-d20b46f24060" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ContractWithCustomerLiability"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ContractWithCustomerLiabilityCurrent_7b6dfdc9-1f61-4004-b4fb-8de3158e21b2" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ContractWithCustomerLiabilityCurrent"/>
    <link:calculationArc order="1" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_ContractWithCustomerLiability_2863d5c2-4bbd-4ef4-94b5-d20b46f24060" xlink:to="loc_us-gaap_ContractWithCustomerLiabilityCurrent_7b6dfdc9-1f61-4004-b4fb-8de3158e21b2" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ContractWithCustomerLiabilityNoncurrent_08f55c1b-89a9-4850-bdb2-0475e17a5e5d" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ContractWithCustomerLiabilityNoncurrent"/>
    <link:calculationArc order="2" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_ContractWithCustomerLiability_2863d5c2-4bbd-4ef4-94b5-d20b46f24060" xlink:to="loc_us-gaap_ContractWithCustomerLiabilityNoncurrent_08f55c1b-89a9-4850-bdb2-0475e17a5e5d" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ContractWithCustomerAssetNet_019c6c03-19db-755a-a38b-857e8dc22008" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ContractWithCustomerAssetNet"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ContractWithCustomerAssetNetCurrent_019c6c03-19db-72b1-93bf-ce7a02d7cbb8" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ContractWithCustomerAssetNetCurrent"/>
    <link:calculationArc order="1" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_ContractWithCustomerAssetNet_019c6c03-19db-755a-a38b-857e8dc22008" xlink:to="loc_us-gaap_ContractWithCustomerAssetNetCurrent_019c6c03-19db-72b1-93bf-ce7a02d7cbb8" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ContractWithCustomerAssetNetNoncurrent_019c6c03-19db-7453-84b4-2f4555f91304" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ContractWithCustomerAssetNetNoncurrent"/>
    <link:calculationArc order="2" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_ContractWithCustomerAssetNet_019c6c03-19db-755a-a38b-857e8dc22008" xlink:to="loc_us-gaap_ContractWithCustomerAssetNetNoncurrent_019c6c03-19db-7453-84b4-2f4555f91304" xlink:type="arc"/>
  </link:calculationLink>
  <link:roleRef roleURI="http://ouster.com/role/SegmentsDetails" xlink:type="simple" xlink:href="oust-20251231.xsd#SegmentsDetails"/>
  <link:calculationLink xlink:role="http://ouster.com/role/SegmentsDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_NetIncomeLoss_b41fad19-daff-485a-9ab8-755aebfc0f25" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_NetIncomeLoss"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_NonoperatingIncomeExpense_2c87df85-9d0b-40f5-8310-e6e27c8d9121" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_NonoperatingIncomeExpense"/>
    <link:calculationArc order="1" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetIncomeLoss_b41fad19-daff-485a-9ab8-755aebfc0f25" xlink:to="loc_us-gaap_NonoperatingIncomeExpense_2c87df85-9d0b-40f5-8310-e6e27c8d9121" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncomeTaxExpenseBenefit_df61363c-62c3-4512-bc62-bd014d75c7cf" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_IncomeTaxExpenseBenefit"/>
    <link:calculationArc order="2" weight="-1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetIncomeLoss_b41fad19-daff-485a-9ab8-755aebfc0f25" xlink:to="loc_us-gaap_IncomeTaxExpenseBenefit_df61363c-62c3-4512-bc62-bd014d75c7cf" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ManufacturingCosts_cf0d6be0-3f6a-492f-955e-9d05b60afb59" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ManufacturingCosts"/>
    <link:calculationArc order="3" weight="-1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetIncomeLoss_b41fad19-daff-485a-9ab8-755aebfc0f25" xlink:to="loc_us-gaap_ManufacturingCosts_cf0d6be0-3f6a-492f-955e-9d05b60afb59" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensation_2a3429f1-08a8-46a0-b44b-66e080626cf4" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ShareBasedCompensation"/>
    <link:calculationArc order="4" weight="-1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetIncomeLoss_b41fad19-daff-485a-9ab8-755aebfc0f25" xlink:to="loc_us-gaap_ShareBasedCompensation_2a3429f1-08a8-46a0-b44b-66e080626cf4" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherCostOfOperatingRevenue_7e27c55c-2de8-4990-a618-e90774f4cee4" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_OtherCostOfOperatingRevenue"/>
    <link:calculationArc order="5" weight="-1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetIncomeLoss_b41fad19-daff-485a-9ab8-755aebfc0f25" xlink:to="loc_us-gaap_OtherCostOfOperatingRevenue_7e27c55c-2de8-4990-a618-e90774f4cee4" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ResearchAndDevelopmentExpense_4eee9458-b44f-4df6-bc43-058c9d534040" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ResearchAndDevelopmentExpense"/>
    <link:calculationArc order="6" weight="-1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetIncomeLoss_b41fad19-daff-485a-9ab8-755aebfc0f25" xlink:to="loc_us-gaap_ResearchAndDevelopmentExpense_4eee9458-b44f-4df6-bc43-058c9d534040" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SellingAndMarketingExpense_1215f990-6113-42c3-a82f-bcaa1dd2f315" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_SellingAndMarketingExpense"/>
    <link:calculationArc order="7" weight="-1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetIncomeLoss_b41fad19-daff-485a-9ab8-755aebfc0f25" xlink:to="loc_us-gaap_SellingAndMarketingExpense_1215f990-6113-42c3-a82f-bcaa1dd2f315" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_GeneralAndAdministrativeExpense_b3e4c581-7946-483d-83c3-0fa17741bf27" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_GeneralAndAdministrativeExpense"/>
    <link:calculationArc order="8" weight="-1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetIncomeLoss_b41fad19-daff-485a-9ab8-755aebfc0f25" xlink:to="loc_us-gaap_GeneralAndAdministrativeExpense_b3e4c581-7946-483d-83c3-0fa17741bf27" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RevenueFromContractWithCustomerExcludingAssessedTax_be8b1dd1-1c89-4d6c-905a-8326cc76f889" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_RevenueFromContractWithCustomerExcludingAssessedTax"/>
    <link:calculationArc order="9" weight="1.0" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetIncomeLoss_b41fad19-daff-485a-9ab8-755aebfc0f25" xlink:to="loc_us-gaap_RevenueFromContractWithCustomerExcludingAssessedTax_be8b1dd1-1c89-4d6c-905a-8326cc76f889" xlink:type="arc"/>
  </link:calculationLink>
</link:linkbase>
