Number base converter
Type a number in any base and instantly get its value in the others.
Everything runs in your browser. Nothing you type or paste is sent to a server.
How to number base converter
- 1
Type the number.
- 2
Tell us which base it's in (decimal, binary, hex…).
- 3
Copy the result in the base you need.
About this tool
It handles whole numbers of any size using arbitrary-precision arithmetic, so 64-bit values and beyond convert without losing digits.
Besides the usual bases, you can use any base from 2 to 36 (base 36 is handy for short IDs).
Frequently asked questions
Does it support decimals?
For now it converts whole numbers, positive or negative.
Can I type prefixes like 0x or 0b?
Yes, they're ignored when reading hexadecimal and binary numbers.