Document and Entity Information - shares	3 Months Ended
	Jun. 30, 2018	Aug. 06, 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 Filer Category	Large Accelerated Filer
Entity Common Stock, Shares Outstanding		13,720,043
Document Fiscal Year Focus	2019
Document Fiscal Period Focus	Q1
Document Type	10-Q
Amendment Flag	false
Document Period End Date	Jun. 30, 2018