Document and Entity Information - USD ($)	12 Months Ended
	Mar. 31, 2019	May 20, 2019	Sep. 30, 2018
Document and Entity Information [Abstract]
Entity Registrant Name	EPLUS INC
Entity Central Index Key	0001022408
Current Fiscal Year End Date	--03-31
Entity Well-known Seasoned Issuer	Yes
Entity Voluntary Filers	No
Entity Current Reporting Status	Yes
Entity Shell Company	false
Entity Filer Category	Large Accelerated Filer
Entity Small Business	false
Entity Emerging Growth Company	false
Entity Ex Transition Period	false
Entity Public Float			$ 1,240,900,462
Entity Common Stock, Shares Outstanding		13,610,299
Document Type	10-K
Amendment Flag	false
Document Period End Date	Mar. 31, 2019
Document Fiscal Year Focus	2019
Document Fiscal Period Focus	FY