Hex to Decimal Converter
Type a hexadecimal number to see it in decimal, and in the other number bases.
Result
| Base | Value |
|---|---|
| Binary (base 2) | 1111 1111 |
| Octal (base 8) | 377 |
| Decimal (base 10) | 255 |
| Hexadecimal (base 16) | FF |
How to use it
- Type the number (spaces and prefixes such as 0x are fine).
- Check the From and To bases, or change them.
- Read the result, and the same number in every base in the table.
About this tool
Hexadecimal uses 16 digits: 0 to 9 and then A to F for 10 to 15. Each position is worth a power of 16. So FF is 15×16 + 15 = 255, and 1A3 is 1×256 + 10×16 + 3 = 419.
Hex is common in web colors (such as #FF8800), memory addresses and character codes.
Formula
- Decimal = sum of (digit × 16^position), counting positions from 0 on the right.
- A=10, B=11, C=12, D=13, E=14, F=15.
Examples
- Hexadecimal A = 10 (decimal)
- Hexadecimal FF = 255 (decimal)
- Hexadecimal 1A3 = 419 (decimal)
- Hexadecimal FFFF = 65535 (decimal)
Tips
- You can type lowercase or uppercase letters, and an optional 0x prefix is accepted.
- Very long numbers are handled exactly, up to 200 digits.
- Negative numbers are accepted with a minus sign.
Questions and answers
How do I convert hexadecimal to decimal?
Decimal = sum of (digit × 16^position), counting positions from 0 on the right.
What is FF in decimal?
FF in hexadecimal is 255 in decimal.
Can I use lowercase letters or a prefix?
Yes. Lowercase letters work, and prefixes such as 0b, 0o and 0x are accepted.
Are my numbers saved or sent anywhere?
No. The conversion runs in your browser on your own device. Nothing you type is sent to Paul Digital or any other server.
More tools
- Decimal to Hex Converter
- Hex to Binary Converter
- Binary to Hex Converter
- Binary to Decimal Converter
- All math and number tools
Privacy
The conversion runs in your browser on your own device. Nothing you type is sent to Paul Digital or any other server. Very long numbers are handled exactly.