Chmod Calculator
Convert between octal and rwx permissions
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Convert between octal and rwx permissions
All processing happens locally in your browser. Your data is never uploaded to a server.
rw-r--r--
| Who | Read r | Write w | Execute x |
|---|---|---|---|
| Owner (u) | |||
| Group (g) | |||
| Others (o) |
| Octal | 644 |
|---|---|
| Symbolic | rw-r--r-- |
| As ls -l shows it | -rw-r--r-- |
| Command | chmod 644 file |
Each digit sums three bits: read 4, write 2, execute 1 — so 755 is rwx / r-x / r-x. In the four-digit form the leading digit holds special bits: 4000 setuid, 2000 setgid, 1000 sticky. Those have no column of their own in ls -l; they overload the matching x, showing lowercase s/t when execute is set and uppercase S/T when it is not — uppercase usually means the bit is a mistake.