What does Chmod Calculator actually do?

The chmod calculator maps permission bits to a symbolic string and an octal mode such as 755 or 644. It does not change a file on disk. Execute, setuid, and directory semantics still depend on the operating system.

When should I use Chmod Calculator?

Use it to translate “owner read/write, group read, others read” into 644.

When should I not use Chmod Calculator?

Do not apply 777 because the calculator can represent it.

What does Chmod Calculator not do?

Nothing is chmod’d on your machine. Octal here is the permission mode, not a full ls -l listing.

Chmod Calculator

Convert Unix file permissions between octal, symbolic (rwx), and chmod commands. Free online — runs locally, no upload.

Octal

Symbolic

chmod (octal)

chmod 755 path

chmod (symbolic)

chmod u=rwx,g=rx,o=rx path

Quick guide

7 = rwx, 6 = rw-, 5 = r-x, 4 = r--. Common: 755 dirs/scripts, 644 files, 600 secrets.

Who	Read (r)	Write (w)	Execute (x)
Owner (u)
Group (g)
Other (o)

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Chmod Calculator