Chmod-Calculator.app

Chmod Calculator Logo

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)

Read
Write
Execute

Group

Read
Write
Execute

Others (Public)

Read
Write
Execute

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
DecimalCalculationSymbolicDescription
00 + 0 + 0- - -none
10 + 0 + 1- - xexecute only
20 + 2 + 0- w -write only
30 + 2 + 1- w xwrite and execute
44 + 0 + 0r - -read only
54 + 0 + 1r - xread and execute
64 + 2 + 0r w -read and write
74 + 2 + 1r w xread, 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.