| Cover | Oct. 23, 2024 |
| Cover [Abstract] | |
| Document Type | 8-K |
| Amendment Flag | false |
| Document Period End Date | Oct. 23, 2024 |
| Entity File Number | 001-37464 |
| Entity Registrant Name | Cemtrex Inc. |
| Entity Central Index Key | 0001435064 |
| Entity Tax Identification Number | 30-0399914 |
| Entity Incorporation, State or Country Code | DE |
| Entity Address, Address Line One | 135 Fell Ct. |
| Entity Address, City or Town | Hauppauge |
| Entity Address, State or Province | NY |
| Entity Address, Postal Zip Code | 11788 |
| City Area Code | (631) |
| Local Phone Number | 756-9116 |
| Written Communications | false |
| Soliciting Material | false |
| Pre-commencement Tender Offer | false |
| Pre-commencement Issuer Tender Offer | false |
| Title of 12(b) Security | Common Stock |
| Trading Symbol | CETX |
| Security Exchange Name | NASDAQ |
| Entity Emerging Growth Company | false |
