Number Base Converter

Convert between decimal, binary, hexadecimal, and octal with a bit-grid visual

(255)₁₀ = (11111111)₂ = (FF)₁₆

Binary (base 2)11111111

Octal (base 8)377

Decimal (base 10)255

Hexadecimal (base 16)FF

About this calculator

The Number Base Converter converts integers between any bases from 2 to 36, including binary, octal, decimal, and hexadecimal. Enter any value and choose the source and target bases to see the conversion instantly. Useful for computer science, programming, and digital electronics.

Common examples

255 (decimal) → FF (hexadecimal, base 16)
1010 (binary, base 2) → 10 (decimal)
255 (decimal) → 11111111 (binary)
255 (decimal) → 377 (octal, base 8)
1A3F (hexadecimal) → 6719 (decimal)