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Base Converter
Convert numbers between binary, octal, decimal, hexadecimal, and custom bases (2-36)
What this tool does
Base Converter helps you convert numbers between binary, octal, decimal, hexadecimal, and custom bases (2-36).
What you get
Base Converter produces a direct output in this page and keeps all processing on your device, with nothing uploaded to our servers.
Decimal: Use digits 0-9
Common Conversions
| Decimal | Binary | Octal | Hexadecimal |
|---|---|---|---|
| 0 | 0 | 0 | 0 |
| 10 | 1010 | 12 | A |
| 15 | 1111 | 17 | F |
| 255 | 11111111 | 377 | FF |
| 1024 | 10000000000 | 2000 | 400 |
Number Systems
Common Bases
- Binary (Base 2): Uses 0, 1. Used in computers.
- Octal (Base 8): Uses 0-7. Common in Unix permissions.
- Decimal (Base 10): Uses 0-9. Standard counting system.
- Hexadecimal (Base 16): Uses 0-9, A-F. Used in colors, memory addresses.
How It Works
Each digit position in a number represents a power of the base. For example, in decimal 123:
1×10² + 2×10¹ + 3×10⁰ = 123
In binary 1010:
1×2³ + 0×2² + 1×2¹ + 0×2⁰ = 10
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