Factorial calculator

This factorial calculator will find the factorial number of any number up to about 21 before going over to exponential syntax.


Factorial number: 120

Factorial numbers are calculated by multiplying all the numbers less than the factorial number n. For example, 3! is equal to 3 x 2 x 1.

Our calculations

At Calculatorian, we are keen to share our knowledge, be transparent and open to feedback. Here are the calculations used to create this calculator. If you find an error or deficiency, contact us and we'll fix it in an instant!

Factorial number was calculated like this:

Variables used in this formula

a = Find the factorial of this number