Chmod-Calculator.app
Easily calculate and convert chmod permissions between Numeric (e.g. 777), Symbolic (e.g. +x), and RWX notations (e.g. rw-r--r--).
Chmod Calculator
Simple Chmod Calculator with intuitive checkbox on user, group and others
Check any permission box or input any Chmod options to get instant calculation results !
User (Owner) Permissions
Group Permissions
Others (Public) Permissions
Chmod Permissions Calculation Table
| r w x | |||
|---|---|---|---|
| 4 2 1 | |||
| Decimal | Calculation | Symbolic | Description |
| 0 | 0 + 0 + 0 | - - - | none |
| 1 | 0 + 0 + 1 | - - x | execute only |
| 2 | 0 + 2 + 0 | - w - | write only |
| 3 | 0 + 2 + 1 | - w x | write and execute |
| 4 | 4 + 0 + 0 | r - - | read only |
| 5 | 4 + 0 + 1 | r - x | read and execute |
| 6 | 4 + 2 + 0 | r w - | read and write |
| 7 | 4 + 2 + 1 | r w x | read, write, and execute |
Common Chmod Options
Understanding chmod +x
The chmod +x command adds execute permission to a file or directory. This allows the file to be run as a program or script, or allows a directory to be searched. It's commonly used when you download a script or compile a program and need to make it executable. For example, after creating a bash script, you might run 'chmod +x myscript.sh' to make it executable.