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Number Base Converter

Convert between binary, octal, decimal, and hex

Binary (Base 2)
11111111
Octal (Base 8)
377
Decimal (Base 10)
255
Hexadecimal (Base 16)
FF
Custom Base
73

Common number bases

  • Binary (2) — used in computing at the hardware level
  • Octal (8) — file permissions in Unix/Linux
  • Decimal (10) — everyday numbers
  • Hexadecimal (16) — colors, memory addresses, byte values

Want to learn more?

Read the complete guide with examples and tips

Read guide