Home / Converters / Decimal Converter

Decimal Converter

Convert decimal numbers to binary, hex and octal instantly.

How to use

  1. Enter a decimal number.
  2. Pick the target base.
  3. Copy the result - all bases are shown for reference.

Frequently asked questions

Why hex for programmers?

One hex digit is exactly 4 bits, so bytes read as neat 2-digit pairs - 255 is FF, far more compact than 11111111.

Related tools

  • Hex Converter — Convert hexadecimal to decimal, binary or octal - and back.
  • Octal Converter — Convert octal to decimal, binary or hex - and back.
  • Roman Numeral Converter — Convert numbers to Roman numerals and back - auto-detects direction.
  • Number to Words — Spell out any number in words - international or Indian system.
  • Scientific Notation Converter — Convert between plain numbers, scientific and engineering notation.
  • Temperature Converter — Celsius, Fahrenheit and Kelvin - all three at once.

See all converters