Quick guide
How to use the Decimal to Hex Converter
- Enter or choose decimal integer.
- Select Convert to hex.
- Review the main result, supporting details, and calculation method.
- Copy the result or download generated files when that option is available.
What this tool does
Convert a base-10 integer to hexadecimal, the base-16 notation used in programming, memory addresses, and color values. Hexadecimal uses digits 0–9 followed by A–F for decimal values 10–15.
Calculation method
- Divide the decimal integer by 16 and record the remainder.
- Convert remainders from 10 through 15 to A through F.
- Repeat with the quotient and read the remainders from last to first.
Example: convert decimal 255
Input: Decimal integer: 255
Result: Hexadecimal: FF
255 ÷ 16 gives quotient 15 and remainder 15. Both values map to F, producing FF.
Practical uses
- Programming and debugging
- CSS color components
- Memory and byte inspection
- Digital electronics
Accuracy tips and common mistakes
- The input must be a whole number.
- A leading 0x is a programming convention and is not part of the hexadecimal value itself.
- Letter case does not change the numeric value of A–F.