Number Base Converter
Convert number systems
The converter transforms a number between the four common number systems: binary (base 2), octal (8), decimal (10) and hexadecimal (16). Thanks to BigInt, even very large numbers are exact.
- Choose base: Specify which system your input is in – the rest is calculated automatically.
- Hex: Output in uppercase (0–9, A–F).
- Arbitrarily large: No rounding errors like with normal JavaScript numbers.