Document and Entity Information - shares	3 Months Ended
	Jun. 30, 2019	Aug. 05, 2019
Cover [Abstract]
Entity Registrant Name	EPLUS INC
Entity Central Index Key	0001022408
Current Fiscal Year End Date	--03-31
Entity Current Reporting Status	Yes
Entity Interactive Data Current	Yes
Entity Shell Company	false
Entity Filer Category	Large Accelerated Filer
Entity Small Business	false
Entity Emerging Growth Company	false
Entity Common Stock, Shares Outstanding		13,506,047
Document Type	10-Q
Amendment Flag	false
Document Period End Date	Jun. 30, 2019
Document Fiscal Year Focus	2020
Document Fiscal Period Focus	Q1
Document Quarterly Report	true
Document Transition Report	false
Entity File Number	001-34167
Entity Tax Identification Number	54-1817218
Entity Incorporation, State or Country Code	DE
Entity Address, Address Line One	15395 Dulles Technology Drive
Entity Address, City or Town	Herndon
Entity Address, State or Province	VA
Entity Address, Postal Zip Code	20171-3413
City Area Code	703
Local Phone Number	984-8400
Title of 12(b) Security	Common Stock, $.01 par value
Trading Symbol	PLUS
Security Exchange Name	NASDAQ