Hex Calculator
Convert a number between hexadecimal and decimal, in either direction.
- Free to use
- Accurate results
- No registration required
- Works on all devices
Enter a number and choose a direction to convert between hexadecimal and decimal.
Enter a decimal number, or a hex number using digits 0-9 and letters a-f, depending on the direction chosen below.
Your result
ff
Result
AI explanation
Formula
Repeated division/multiplication by 16 to convert between decimal and hexadecimal place valuesWorked example
Decimal 255 to hex
| Field | Value |
|---|---|
| Value | 255 |
| Convert | from-decimal |
| Result | ff |
Assumptions
- Only non-negative whole numbers are supported.
- Hex input must contain only the digits 0-9 and letters a-f (case-insensitive).
Frequently asked questions
How does hexadecimal (base 16) work?
Hex uses 16 digits — 0 through 9, then a through f for 10 through 15 — with each position representing a power of 16.
Why is hex commonly used in computing?
Hex is a compact way to represent binary data, since each hex digit corresponds to exactly 4 binary digits (bits) — it's commonly used for color codes, memory addresses, and byte values.
What if I only need one direction?
Use the Decimal to Hex Calculator or Hex to Decimal Calculator for a single-purpose version of this same conversion.