Math calculator
Factorial Calculator for n!
Calculate n factorial for whole numbers up to 170.
Formulan! = n x (n - 1) x ... x 1
Formula
Factorial
n! = n x (n - 1) x ... x 1
8! equals 40,320.
FAQ6 common questions for this calculator.
FAQs
What is 0 factorial?+
0! is defined as 1.
Why is input capped?+
Factorials grow extremely quickly, so the calculator caps inputs at 170.
How does the Factorial Calculator calculate the result?+
For the Factorial Calculator, it uses the Factorial: n! = n x (n - 1) x ... x 1. 8! equals 40,320.
What information do I need to use the Factorial Calculator?+
For the Factorial Calculator, enter the known quantities requested by the calculator and use the units implied by the Factorial. If a value is unknown, choose a calculator that solves for that specific variable.
How accurate is the Factorial Calculator?+
Factorial Calculator is mathematically reliable for the entered values and selected operation. It follows the Factorial. Rounding, order of operations, and undefined cases can still affect interpretation.
What should I check before using the Factorial Calculator result?+
For the Factorial Calculator, check the input values, operation order, rounding precision, and undefined cases before using the result. Compare one changed value at a time when testing scenarios.
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Math guide
How to use the Factorial Calculator
Calculate n factorial for whole numbers up to 170. The page also explains the factorial and shows a practical example: 8! equals 40,320.
- 1
Enter your details
Enter the values for the factorial calculator scenario you want to check.
- 2
Check the calculation
Review the result alongside the factorial: n! = n x (n - 1) x ... x 1.
- 3
Compare scenarios
Change one or more inputs to see how they affect the factorial Calculator result before you use the estimate.