Document and Entity Information - shares	3 Months Ended
	Mar. 31, 2021	May 27, 2021
Document Information [Line Items]
Document Type	10-Q
Document Quarterly Report	true
Document Transition Report	false
Document Period End Date	Mar. 31, 2021
Entity File Number	001-39841
Entity Registrant Name	KAIROS ACQUISITION CORP.
Entity Incorporation, State or Country Code	KY
Entity Tax Identification Number	00-0000000
Entity Address, Address Line One	c/o Ellenoff Grossman & Schole LLP
Entity Address, Address Line Two	1345 Avenue of the Americas
Entity Address, City or Town	New York
Entity Address State Or Province	NY
Entity Address, Postal Zip Code	10105
City Area Code	(917)
Local Phone Number	783-4057
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
Entity Shell Company	true
Entity Central Index Key	0001824171
Current Fiscal Year End Date	--12-31
Document Fiscal Year Focus	2021
Document Fiscal Period Focus	Q1
Amendment Flag	false
Transition Report	false
Units, each consisting of one share of Class A Common Stock and one-half of one Warrant
Document Information [Line Items]
Title of 12(b) Security	Units, each consisting of one Class A ordinary share and one-half of one redeemable warrant
Trading Symbol	KAIRU
Security Exchange Name	NASDAQ
Class A Common Stock
Document Information [Line Items]
Title of 12(b) Security	Class A ordinary shares, par value $0.0001 per share
Trading Symbol	KAIR
Security Exchange Name	NASDAQ
Entity Common Stock, Shares Outstanding		27,600,000
Redeemable warrants, each whole warrant exercisable for one share of Class A Common Stock at an exercise price of $11.50
Document Information [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 ordinary share
Trading Symbol	KAIRW
Security Exchange Name	NASDAQ
Class B Common Stock
Document Information [Line Items]
Entity Common Stock, Shares Outstanding		6,900,000