Code & web

Chmod calculator

Convert an octal code (755) to readable permissions (rwxr-xr-x) and back.

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<iframe src="https://calc.hod-group.com/embed/?hodtool=chmod&amp;hodlang=en" title="Chmod calculator" loading="lazy" style="width:100%;max-width:720px;height:560px;border:0;border-radius:12px" data-hodcalc></iframe>
<p style="font:13px sans-serif;margin:6px 0 0">Calculator by <a href="https://calc.hod-group.com/en/chmod-calculator/">HOD Calc</a></p>
<script async src="https://calc.hod-group.com/assets/embed.js"></script>

How it works

Each digit = owner, group, others. Read (r) = 4, write (w) = 2, execute (x) = 1. 7 = rwx, 5 = r-x, 4 = r--.

Results are for guidance only and do not replace professional advice.

Worked example

With the default values:

Octal or symbolic mode754

you get:

Permissions754 · rwxr-xr--
Ownerread, write, execute
Groupread, execute
Othersread

Frequently asked questions

How does the “Chmod calculator” tool work?

Each digit = owner, group, others. Read (r) = 4, write (w) = 2, execute (x) = 1. 7 = rwx, 5 = r-x, 4 = r--.

What do I need to enter?

Just fill in: octal or symbolic mode. The result updates as you type.

Can you give an example?

Octal or symbolic mode: 754 → Permissions: 754 · rwxr-xr--; Owner: read, write, execute.

Is this calculator free, and is my data private?

Yes. HOD Calc is completely free with no sign-up. The calculation runs in your browser: nothing you type is sent or stored.