Decimal to Hex Calculator

Convert a decimal (base 10) number to hexadecimal (base 16).

  • Free to use
  • Accurate results
  • No registration required
  • Works on all devices
Enter a decimal number to convert it to hexadecimal.
A non-negative whole number.

Your result

ff

Hex

AI explanation

Formula

Repeated division by 16, reading the remainders (as hex digits) from bottom to top

Worked example

255 to hex

Worked example: 255 to hex
FieldValue
Decimal number255
Hexff

Assumptions

  • Only non-negative whole numbers are supported.
  • The result uses lowercase letters a-f for digit values 10-15.

Frequently asked questions

How do I convert decimal to hex by hand?

Repeatedly divide the decimal number by 16, recording the remainder each time (using a-f for remainders 10-15). Reading the remainders from the last division to the first gives the hex result.

Where might I see a hex value like this?

Hex is commonly used for color codes (like #ff0000 for red), memory addresses, and representing raw byte values in a compact form.

What about the reverse conversion?

Use the Hex to Decimal Calculator to convert a hex number back to decimal.

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