Number Base Converter
Convert numbers between decimal, binary, octal, and hexadecimal bases instantly.
Conversion Results
Decimal (Base 10)
42
Binary (Base 2)
101010
Octal (Base 8)
52
Hexadecimal (Base 16)
2A
Quick Examples
Number Base Reference
Binary (Base 2)
Digits: 0, 1
Octal (Base 8)
Digits: 0-7
Decimal (Base 10)
Digits: 0-9
Hexadecimal (Base 16)
Digits: 0-9, A-F
1. Select the input number base (Binary, Octal, Decimal, or Hexadecimal)
2. Enter the number you want to convert
3. All other base representations will be calculated automatically
4. Click the copy button next to any result to copy it to your clipboard
5. Use the example buttons to see how different numbers convert
Note: All processing happens in your browser. Your data never leaves your device.
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