Factorial Calculator (n!)
Factorial calculator: exact value of n! for n up to 2000, its number of digits and trailing zeros.
n! = 1 · 2 · 3 · … · n
How to use this calculator
- Type your input in the box.
- The result updates as you type.
- Use “Copy result” or “Copy link” to share it.
n! is the product of all whole numbers from 1 to n; 0! = 1. Factorials grow extremely fast: 20! already has 19 digits.
Frequently asked questions
What is 10!?
3,628,800.
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