Number Base Converter (Binary, Hex, Octal)
Number base converter: convert between decimal, binary, octal and hexadecimal, including very large numbers.
25510 = FF16 = 111111112
How to use this calculator
- Type your input in the box.
- The result updates as you type.
- Use “Copy result” or “Copy link” to share it.
Each position is a power of the base: 11111111₂ = 255₁₀ = FF₁₆.
Prefixes 0b, 0o and 0x are accepted.
Frequently asked questions
What is 255 in hexadecimal?
FF.