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    <periodOfReport>2018-07-09</periodOfReport>

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    <issuer>
        <issuerCik>0001418135</issuerCik>
        <issuerName>Keurig Dr Pepper Inc.</issuerName>
        <issuerTradingSymbol>KDP</issuerTradingSymbol>
    </issuer>

    <reportingOwner>
        <reportingOwnerId>
            <rptOwnerCik>0001579754</rptOwnerCik>
            <rptOwnerName>NEWMAN MARGARET</rptOwnerName>
        </reportingOwnerId>
        <reportingOwnerAddress>
            <rptOwnerStreet1>53 SOUTH AVE.</rptOwnerStreet1>
            <rptOwnerStreet2></rptOwnerStreet2>
            <rptOwnerCity>BURLINGTON</rptOwnerCity>
            <rptOwnerState>MA</rptOwnerState>
            <rptOwnerZipCode>01803</rptOwnerZipCode>
            <rptOwnerStateDescription></rptOwnerStateDescription>
        </reportingOwnerAddress>
        <reportingOwnerRelationship>
            <isDirector>0</isDirector>
            <isOfficer>1</isOfficer>
            <isTenPercentOwner>0</isTenPercentOwner>
            <isOther>0</isOther>
            <officerTitle>Chief Human Resources Officer</officerTitle>
        </reportingOwnerRelationship>
    </reportingOwner>

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                <value></value>
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                <value></value>
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                <transactionShares>
                    <value>43284</value>
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                    <value>0.00</value>
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    <footnotes>
        <footnote id="F1">Pursuant to the Agreement and Plan of Merger dated as of January 29, 2018 (the &quot;Merger Agreement&quot;), by and among Maple Parent Holdings Corp., a Delaware corporation (&quot;Maple&quot;), Dr Pepper Snapple Group, Inc., a Delaware corporation (&quot;DPS&quot;) and Salt Merger Sub, Inc., a Delaware corporation and wholly-owned subsidiary of DPS (&quot;Merger Sub&quot;), Merger Sub merged on July 9, 2018 with and into Maple (the &quot;Merger&quot;), with Maple surviving the Merger as a wholly-owned subsidiary of DPS. As of the effective time of the Merger, DPS was renamed Keurig Dr Pepper Inc. (&quot;KDP&quot;), and each share of common stock of Maple issued and outstanding immediately prior to the effective time was converted into the right to receive 96.4 fully paid and nonassessable shares of KDP common stock.</footnote>
        <footnote id="F2">Upon vesting, each Restricted Stock Unit settles for one share of common stock.</footnote>
        <footnote id="F3">Pursuant to the Merger Agreement, as of the effective time of the Merger, each Maple Restricted Stock Unit (&quot;RSU&quot;) that was outstanding immediately prior to the effective time was converted to 96.4 KDP RSUs, with the same terms and conditions as were applicable under such Maple RSU immediately prior to the effective time.</footnote>
        <footnote id="F4">These Restricted Stock Units vest on September 13, 2021.</footnote>
    </footnotes>

    <remarks></remarks>

    <ownerSignature>
        <signatureName>Kristin E. Blazewicz, attorney in fact</signatureName>
        <signatureDate>2018-07-11</signatureDate>
    </ownerSignature>
</ownershipDocument>
