Document And Entity Information - USD ($)	12 Months Ended
	Sep. 30, 2015	Dec. 11, 2015
Document Information [Line Items]
Entity Registrant Name	CEMTREX INC
Entity Central Index Key	0001435064
Current Fiscal Year End Date	--09-30
Entity Filer Category	Smaller Reporting Company
Trading Symbol	CETX
Entity Common Stock, Shares Outstanding		7,585,267
Document Type	10-K
Amendment Flag	false
Document Period End Date	Sep. 30, 2015
Document Fiscal Period Focus	FY
Document Fiscal Year Focus	2015
Entity Well-known Seasoned Issuer	Yes
Entity Voluntary Filers	No
Entity Current Reporting Status	Yes
Entity Public Float		$ 8,364,305