Chmod Permissions Calculator

A free online Chmod Permissions Calculator. Easily calculate Unix and Linux file system permissions by checking Read, Write, and Execute boxes for Owner, Group, and Public/Others. Instantly generates the octal representation (like 755 or 644), symbolic notation (like rwxr-xr-x), and the exact chmod terminal command to copy-paste. Perfect for developers, DevOps engineers, and system administrators.

e.g., 644
e.g., rw-r--r--

Interactive Grid permissionsSelect checkboxes to calculate

Scope
Read (4)
Write (2)
Execute (1)
Owner (User)
Group
Public (Others)
Octal Sum
755
Chmod Shell Command
chmod 755 script.sh

Common Chmod Presets

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