Math & Calculators / Factorial Calculator
Factorial Calculator
Calculate the factorial of any non-negative integer.
Features
- Supports large numbers precisely
- Uses big-integer math for accuracy
- Instant results
- Free, unlimited use
How to Use
Step 1
Enter a non-negative whole number.
Step 2
Click Calculate Factorial.
Step 3
View the result.
About This Tool
Factorial Calculator computes n! (n factorial), the product of all positive integers up to n, supporting very large results using precise big-integer math.
Formula used: n! = n x (n-1) x (n-2) x ... x 1, with 0! defined as 1.
Frequently Asked Questions
Why is there a limit around 170?
Beyond 170!, the result exceeds what can be precisely represented, even with big-integer math in this implementation.
What is 0!?
0! is defined as 1, a standard mathematical convention.