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Number Base Converter

Convert numbers between binary, octal, decimal, hexadecimal, and custom bases (2-36).

Conversions
Enter a number above to see conversions

What is Number Base Conversion?

Number base conversion is the process of converting a number from one numeral system (base) to another. Different bases use different numbers of digits - for example, binary uses only 0 and 1, while hexadecimal uses 0-9 and A-F.

Supported Bases

  • Binary (Base 2): Digits 0-1. Used in computing.
  • Octal (Base 8): Digits 0-7. Shorter binary representation.
  • Decimal (Base 10): Digits 0-9. Standard system.
  • Hexadecimal (Base 16): Digits 0-9 and A-F.
  • Custom (Base 2-36): Any base from 2 to 36.

Common Use Cases

  • Programming: Memory addresses, bit manipulation, debugging
  • Color Codes: RGB to hexadecimal for web design
  • Networking: IP addresses and MAC addresses
  • Computer Science: Understanding number storage

Tips

  • Hex digits A-F can be uppercase or lowercase
  • Negative numbers are supported
  • For bases above 10, use letters A-Z for digits 10-35

100% Private

All conversions are performed locally in your browser using JavaScript. Your numbers never leave your device, ensuring complete privacy.