Document and Entity Information - shares	1 Months Ended
	Mar. 31, 2021	Sep. 13, 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	001-40686
Entity Registrant Name	XPAC ACQUISITION CORP.
Entity Incorporation, State or Country Code	KY
Entity Tax Identification Number	00-0000000
Entity Address, Address Line One	55 West 46th Street, 30th floor
Entity Address, City or Town	New York
Entity Address State Or Province	NY
Entity Address, Postal Zip Code	10036
City Area Code	646
Local Phone Number	664-0501
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	0001853397
Current Fiscal Year End Date	--12-31
Document Fiscal Year Focus	2021
Document Fiscal Period Focus	Q1
Amendment Flag	false
Transition Report	true
Class A Common Stock
Document Information [Line Items]
Title of 12(b) Security	Class A ordinary share, par value $0.0001 per share
Trading Symbol	XPAX
Security Exchange Name	NASDAQ
Entity Common Stock, Shares Outstanding		21,961,131
Warrants, each whole warrant exercisable for one share of common stock at an exercise price of $11.50 per whole share
Document Information [Line Items]
Title of 12(b) Security	Warrants, each whole warrant exercisable for one share of common stock at an exercise price of $11.50 per whole share
Trading Symbol	XPAXW
Security Exchange Name	NASDAQ
Class B Common Stock
Document Information [Line Items]
Entity Common Stock, Shares Outstanding		5,490,283