Base Converter
Use this tool to convert numbers between different numerical bases, including binary, octal, decimal, hexadecimal, and more. Perfect for programming, math, and digital systems work.
Please enter a valid number for the selected base
About Number Bases
Binary (Base 2) - Uses only 0 and 1. It's the fundamental language of computers and digital systems.
Octal (Base 8) - Uses digits 0-7. Historically used in computing to represent binary in a more compact form.
Decimal (Base 10) - Our standard number system using digits 0-9. The most familiar system for everyday use.
Hexadecimal (Base 16) - Uses digits 0-9 and letters A-F (where A=10, B=11, ..., F=15). Commonly used in programming for memory addresses, color values, and to represent binary more compactly.
Custom Bases - This converter supports any base from 2 to 36, using digits 0-9 and letters A-Z to represent higher digit values.
Fractional Values - Use a period (.) to separate the integer part from the fractional part. For example: "10.5" in decimal or "1010.1" in binary.
Negative Values - Use a minus sign (-) before the number to represent negative values.
Common Base Conversion Table
| Decimal (Base 10) | Binary (Base 2) | Octal (Base 8) | Hexadecimal (Base 16) |
|---|---|---|---|
| 0 | 0 | 0 | 0 |
| 1 | 1 | 1 | 1 |
| 2 | 10 | 2 | 2 |
| 8 | 1000 | 10 | 8 |
| 10 | 1010 | 12 | A |
| 15 | 1111 | 17 | F |
| 16 | 10000 | 20 | 10 |
| 64 | 1000000 | 100 | 40 |
| 100 | 1100100 | 144 | 64 |
| 255 | 11111111 | 377 | FF |
| 256 | 100000000 | 400 | 100 |