Convert numbers between Binary (base 2), Octal (8), Decimal (10), Hexadecimal (16), and any base 2–36.
| Binary (2) | — |
| Octal (8) | — |
| Decimal (10) | — |
| Hex (16) | — |
| Base 36 | — |
This free online tool converts numbers between different numeral systems. Enter a number and select its base, then see it converted to binary, octal, decimal, hexadecimal, and base-36 simultaneously. Essential for programmers working with low-level code, network protocols, or color values.
Binary to Decimal: Select Binary (2), enter your binary number. Hex to Decimal: Select Hex (16), enter hex value (e.g. FF). Decimal to Binary: Select Decimal (10), enter your number.
Need base conversion in your app?