Document and Entity Information - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2021	Mar. 30, 2022	Dec. 23, 2021
Entity Listings [Line Items]
Document Type	10-K
Amendment Flag	false
Document Annual Report	true
Document Period End Date	Dec. 31, 2021
Current Fiscal Year End Date	--12-31
Document Fiscal Year Focus	2021
Document Fiscal Period Focus	FY
Document Transition Report	false
Entity Registrant Name	FOCUS IMPACT ACQUISITION CORP.
Entity Central Index Key	0001854480
Entity Incorporation, State or Country Code	DE
Entity File Number	001-40977
Entity Tax Identification Number	86-2433757
Entity Address, Address Line One	250 Park Avenue Ste 911
Entity Address, City or Town	New York
Entity Address, State or Province	NY
Entity Address, Postal Zip Code	10177
City Area Code	212
Local Phone Number	213-0243
Entity Well-known Seasoned Issuer	No
Entity Voluntary Filers	No
Entity Current Reporting Status	Yes
Entity Interactive Data Current	Yes
Entity Filer Category	Non-accelerated Filer
Entity Small Business	true
Entity Emerging Growth Company	true
Entity Ex Transition Period	false
ICFR Auditor Attestation Flag	false
Entity Shell Company	true
Entity Public Float			$ 227.7
Auditor Firm ID	688
Auditor Name	Marcum LLP
Auditor Location	New York, NY
Units [Member]
Entity Listings [Line Items]
Title of 12(b) Security	Units, each consisting of one share of Class A common stock, 0.0001 par value, and one-half of one warrant
Trading Symbol	FIACU
Security Exchange Name	NASDAQ
Class A Common Stock [Member]
Entity Listings [Line Items]
Title of 12(b) Security	Class A common stock included as part of the units
Trading Symbol	FIAC
Security Exchange Name	NASDAQ
Entity Common Stock, Shares Outstanding		23,000,000
Redeemable Warrants [Member]
Entity Listings [Line Items]
Title of 12(b) Security	Redeemable warrants included as part of the units, each whole warrant exercisable for one share of Class A common stock at an exercise price of 11.50
Trading Symbol	FIACW
Security Exchange Name	NASDAQ
Class B Common Stock [Member]
Entity Listings [Line Items]
Entity Common Stock, Shares Outstanding		5,750,000