Number Base Converter

Free Online Number Base Converter – Binary, Octal, Decimal & Hexadecimal

How to Use
Quick guide and common use-cases

Steps:

  1. Type your number into the input field.
  2. Choose the base it is currently in (Binary, Octal, Decimal, Hex).
  3. Click “Convert” to see the value in all other bases.
  4. Use the copy buttons to grab any result instantly.

Common Use-Cases:

  • Software debugging: translate memory addresses (hex) to decimal.
  • Networking: convert subnet masks between dotted-decimal and hex.
  • Low-level programming: check binary representations of flags or registers.
  • Computer-science homework: verify manual base conversions.
  • Embedded systems: interpret sensor data sent in octal or hex.

Supported Bases:

Binary (2), Octal (8), Decimal (10), Hexadecimal (16). Input is validated for the chosen base; invalid characters are rejected.

Input
Enter a number to convert
Results
Converted values in different bases
binary
octal
decimal
hexadecimal