DownloadKaro · Free online tool

Binary / Decimal Converter

Convert between decimal, binary, octal and hexadecimal — for computer science students and programmers.

Use Binary / Decimal Converter now — free ↗

How to use it

1. Type a decimal number to see binary, octal and hex, or
2. Type a binary number (only 0 and 1) to see its decimal value.
3. Both convert live as you type.

Why use this tool

• All four number systems computer students need
• Instant validation — wrong digits are called out
• Great for Matric/FSc and university computing exams

Common questions

Why do programmers use hex?

Hex (base 16) is a compact way to write binary: one hex digit equals exactly four binary digits, so FF is much easier to read than 11111111.

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