Is the Number Systems free to use?

Yes, the Number Systems is completely free. There is no sign-up, no account required, and no limit on how often you can use it.

Is the Number Systems suitable for classroom use?

Yes, the Number Systems is designed for both individual learners and classroom use. It works on any device with a modern browser — phones, tablets, Chromebooks, and computers.

What devices does the Number Systems work on?

The Number Systems works on any device with a modern web browser — desktop, laptop, tablet, or phone. It is mobile-friendly and works offline once the page has loaded.

📚 Education

Number System Converter

Convert numbers between binary (2), octal (8), decimal (10) and hexadecimal (16). Shows the place value breakdown for each base. Free.

The Number Systems is a free online tool that helps you convert numbers between binary (2), octal (8), decimal (10) and hexadecimal (16). shows the place value breakdown for each base. free It runs in your browser with no sign-up, downloads, or installation needed. All processing happens locally — your data stays on your device.

Input value

Input base

Quick reference

How to use

Number systems explained

Decimal (base 10) uses digits 0–9 and powers of 10. Binary (base 2) uses digits 0–1 and powers of 2 — used internally by all computers. Octal (base 8) uses digits 0–7 and powers of 8. Hexadecimal (base 16) uses digits 0–9 plus A–F and powers of 16 — used in color codes and memory addresses.

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