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
Check any permission box or input any Chmod options to get instant calculation results !
User (Owner)
Group
Others (Public)
Input any chmod Symbolic options to get human-readable interpretation.
A result rwx permission will be calculated if applicable (any Numeric or rwx value is input prior).
Meaning of Symbolic option:
Calculation result in RWX:
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 removes execute permission for all users (owner, group, and others). This is useful when you want to prevent a file from being executed or a directory from being searched. It's often used for security purposes, such as disabling scripts or preventing access to certain directories. For example, 'chmod -x myscript.sh' would make the script non-executable.