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CONVERTER
Number Base Converter
Convert numbers between binary, octal, decimal and hexadecimal instantly. Click any result to use it as the new input.
Common Values
| Decimal | Binary | Octal | Hex |
|---|---|---|---|
| 0 | 0 | 0 | 0 |
| 1 | 1 | 1 | 1 |
| 8 | 1000 | 10 | 8 |
| 10 | 1010 | 12 | A |
| 15 | 1111 | 17 | F |
| 16 | 10000 | 20 | 10 |
| 32 | 100000 | 40 | 20 |
| 64 | 1000000 | 100 | 40 |
| 127 | 1111111 | 177 | 7F |
| 128 | 10000000 | 200 | 80 |
| 255 | 11111111 | 377 | FF |
Number bases explained
Base 2 (Binary)
Digits: 0, 1
Used for: CPU registers, bitmasking, bitwise ops
Base 8 (Octal)
Digits: 0–7
Used for: Unix file permissions (chmod 755)
Base 10 (Decimal)
Digits: 0–9
Used for: Everyday arithmetic and most user-facing numbers
Base 16 (Hex)
Digits: 0–9, A–F
Used for: Color codes, memory addresses, byte representation