Factorial Calculator
Calculate the factorial (n!) of a number.
Result
Results are estimates for general information only and are not professional advice.
Factorials
The factorial of a number n (written n!) is the product of all whole numbers from 1 to n. Factorials are central to permutations, combinations and probability. This calculator handles values from 0 up to 170.
Frequently Asked Questions
What is the Factorial Calculator?
Calculate the factorial (n!) of a number. It runs instantly in your browser and is completely free.
Is the Factorial Calculator free and does it require signup?
Yes. Every calculator on Calculatis is 100% free with no registration, and the values you enter are never stored.
How accurate is the Factorial Calculator?
It uses standard, widely-accepted formulas. Results are reliable estimates for general use and are not a substitute for professional advice.