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Chmod Permission Calculator

Calculate Unix file permissions. Toggle checkboxes to build chmod commands, or enter an octal value.

Permission Grid
EntityRead (4)Write (2)Execute (1)Octal
Owner (u)6
Group (g)4
Others (o)4
Octal
644
Symbolic
rw-r--r--
Command
chmod 644 filename
Enter Octal Value
Common Presets

About Chmod Calculator

Chmod Calculator converts between Unix file permission notation (rwxrwxrwx), octal values, and symbolic notation. Select permissions for owner, group, and others using checkboxes to see the resulting octal chmod value. Essential for Linux and Unix system administrators.

  • Checkbox-based permission selection
  • Shows octal and symbolic notation
  • Owner, group, and others support
  • Instant chmod command output

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