What does this tool do?
| Direct answer | Converts a hexadecimal (base-16) integer to its decimal (base-10) value. |
| Key fact | Hex uses digits 0-9 and A-F; each hex digit is exactly 4 bits. |
| Processing | Runs locally in your browser; no data is sent to a server. |
How to use
- Type a hex number like FF.
- Click Convert.
- See the decimal value.
Example
Input
FF
Output
255
Who is this for?
This tool was built for people who need a fast answer in the browser — no install, no account, no data leaving the device.
Programmers working with low-level data, computer science students, and electronics hobbyists reading registers — anyone tired of converting number bases by hand.
Frequently asked questions
What is FF in decimal?
255 — F is 15, so FF = 15×16 + 15.
Can I enter lowercase letters?
Yes, ff and FF both parse to 255.
Are negative values supported?
Yes, a leading minus sign is respected.