Chmod Calculator is the best calculator for Unix file permissions. It is also very lightweight and ad-free!

Chmod Calculator is the most robust and aesthetic calculator of its kind. It allows you to quickly lookup and display the permission setting value (ie: 0755) for files in 2 different ways. All calculations are made instantly as you input!

It works in two ways: you can check the desired checkboxes or directly enter a valid numeric expression to see its equivalence.

Features:
* Instant results
* Special bits support (setuid setgid sticky)
* Octal input/output
* Terminal command example
* Checkboxes input/output
* Very low filesize
* Ad free
* Simple aesthetic design