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Number Base Converter
Quick reference
| Decimal | Binary | Octal | Hex |
|---|---|---|---|
| 0 | 0 | 0 | 0 |
| 1 | 1 | 1 | 1 |
| 2 | 10 | 2 | 2 |
| 3 | 11 | 3 | 3 |
| 4 | 100 | 4 | 4 |
| 5 | 101 | 5 | 5 |
| 6 | 110 | 6 | 6 |
| 7 | 111 | 7 | 7 |
| 8 | 1000 | 10 | 8 |
| 9 | 1001 | 11 | 9 |
| 10 | 1010 | 12 | A |
| 11 | 1011 | 13 | B |
| 12 | 1100 | 14 | C |
| 13 | 1101 | 15 | D |
| 14 | 1110 | 16 | E |
| 15 | 1111 | 17 | F |
▸About this tool
Convert numbers between binary, octal, decimal, and hexadecimal. Enter a value in any base and see all four representations instantly.
▸Privacy and details
Your files never leave your device.
Fast browser processing with no account required.
Optimized for desktop and mobile with accessible controls.
▸How to use
- Select the base of the number you want to convert (binary, octal, decimal, or hex).
- Type your number in the input field.
- All four representations update instantly: binary, octal, decimal, and hexadecimal.
- Click the copy button next to any base to copy that value.
▸Why use this tool
Programmers frequently need to convert between number bases when working with bit flags, memory addresses, colour codes, or binary protocols. This tool provides instant conversions across all common bases.