Convert Between Binary, Decimal, Hex, and Octal Online
Switch numbers between base-2, base-8, base-10, and base-16 instantly. Essential for programming, digital electronics, and understanding how computers represent data.
Number Base Converter
Convert numbers between decimal, binary, octal, and hexadecimal
Custom Base Converter (Base 2-36)
Quick Reference (0 - 15)
| Decimal | Binary | Octal | Hex | ASCII |
|---|---|---|---|---|
| 0 | 0000 | 0 | 0 | NUL |
| 1 | 0001 | 1 | 1 | CTRL-A |
| 2 | 0010 | 2 | 2 | CTRL-B |
| 3 | 0011 | 3 | 3 | CTRL-C |
| 4 | 0100 | 4 | 4 | CTRL-D |
| 5 | 0101 | 5 | 5 | CTRL-E |
| 6 | 0110 | 6 | 6 | CTRL-F |
| 7 | 0111 | 7 | 7 | BEL |
| 8 | 1000 | 10 | 8 | BS |
| 9 | 1001 | 11 | 9 | TAB |
| 10 | 1010 | 12 | A | LF |
| 11 | 1011 | 13 | B | CTRL-K |
| 12 | 1100 | 14 | C | CTRL-L |
| 13 | 1101 | 15 | D | CR |
| 14 | 1110 | 16 | E | CTRL-N |
| 15 | 1111 | 17 | F | CTRL-O |
Quick Start
- 1Enter a number in any supported base
- 2Select the input base (binary, decimal, hex, or octal)
- 3All other base conversions are shown automatically
- 4Copy the converted value you need
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Looking for FAQs and advanced options? Visit the full Number Base Converter page →