Factorial Calculator
Compute n! exactly for any n from 0 to 1000 using big integers.
10! equals
3628800
Enter a whole number and get its factorial as a full, exact integer string. Powered by BigInt so even 1000! is computed precisely.
How to use
- Type a whole number between 0 and 1000.
- Read the exact factorial result instantly.
- Copy the full integer string with one click.
Frequently asked questions
- What is a factorial?
- The factorial of n (written n!) is the product of all positive integers from 1 up to n. By definition, 0! equals 1.
- Why can it handle such large numbers?
- It uses JavaScript BigInt arithmetic, so results never lose precision and are shown as a complete integer string.