Factorial Calculator
A free, browser-based calculator. Runs entirely in your browser — no sign up, nothing stored.
100% FreeRuns in your browserBasic
Enter Values
Enter your values and press Calculate to see results.
How to use this calculator
- Enter a whole number.
- Press Calculate.
How it works
n! multiplies all whole numbers from 1 to n. Used in probability and combinatorics.
Worked example
5!. = 5 × 4 × 3 × 2 × 1 = 120.
Related tools
Tip: Enter any known values to calculate the remaining results.
All calculations run in your browser. Your inputs are never saved or transmitted.