Cover Page - shares	3 Months Ended
	Jun. 30, 2024	Aug. 02, 2024
Document Information [Line Items]
Document Type	10-Q
Document Quarterly Report	true
Document Period End Date	Jun. 30, 2024
Document Transition Report	false
Entity File Number	001-38021
Entity Registrant Name	HAMILTON LANE INC
Entity Incorporation, State or Country Code	DE
Entity Tax Identification Number	26-2482738
Entity Address, Address Line One	110 Washington Street,
Entity Address, Address Line Two	Suite 1300
Entity Address, City or Town	Conshohocken,
Entity Address, State or Province	PA
Entity Address, Postal Zip Code	19428
City Area Code	610
Local Phone Number	934-2222
Title of 12(b) Security	Class A Common Stock, $0.001 par value per share
Trading Symbol	HLNE
Security Exchange Name	NASDAQ
Entity Current Reporting Status	Yes
Entity Interactive Data Current	Yes
Entity Filer Category	Large Accelerated Filer
Entity Small Business	false
Entity Emerging Growth Company	false
Entity Shell Company	false
Amendment Flag	false
Document Fiscal Year Focus	2025
Document Fiscal Period Focus	Q1
Entity Central Index Key	0001433642
Current Fiscal Year End Date	--03-31
Class A Common Stock
Document Information [Line Items]
Entity Common Stock, Shares Outstanding (in shares)		40,532,856
Class B Common Stock
Document Information [Line Items]
Entity Common Stock, Shares Outstanding (in shares)		13,664,635