Code & web

Binary, decimal, hex converter

Convert a number between binary, octal, decimal and hexadecimal.

Embed this calculator on your website

Copy this code and paste it into your page (WordPress, Wix, Webflow, HTML…). It's free: please keep the link to HOD Calc.

<iframe src="https://calc.hod-group.com/embed/?hodtool=base&amp;hodlang=en" title="Binary, decimal, hex converter" 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/binary-hex-converter/">HOD Calc</a></p>
<script async src="https://calc.hod-group.com/assets/embed.js"></script>

How it works

Each base has its own digits: 0–1 in binary, 0–7 in octal, 0–9 and A–F in hex (A = 10 … F = 15).

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

Worked example

With the default values:

Number255
Written inDecimal (base 10)

you get:

Binary1111 1111
Decimal255
Hexadecimal0xFF
Octal377

Frequently asked questions

How does the “Binary, decimal, hex converter” tool work?

Each base has its own digits: 0–1 in binary, 0–7 in octal, 0–9 and A–F in hex (A = 10 … F = 15).

What do I need to enter?

Just fill in: number, written in. The result updates as you type.

Can you give an example?

Number: 255; Written in: Decimal (base 10) → Binary: 1111 1111; Decimal: 255.

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.