- Fill in n. Each control is labeled; you do not need to paste a JSON blob.
- Click "Run" to run the tool in your browser.
- Read the result below the form and copy it if you need it in another app.
Factorial Calculator
The Factorial Calculator computes the factorial of a non-negative integer.
Configuration for this calculator is missing.
How to Use This Tool
Learn More About Factorial Calculator
Understanding Factorials
The factorial of a non-negative integer n, denoted by n!, is the product of all positive integers less than or equal to n.
Factorial Formula
n! = n × (n-1) × (n-2) × ... × 3 × 2 × 1
Example
5! = 5 × 4 × 3 × 2 × 1 = 120
About
The Factorial Calculator computes the factorial of a non-negative integer. The factorial of a number 'n' is the product of all positive integers less than or equal to 'n'.
Examples
Factorial Calculator: quick try
Input
Input
5
Output
120
Load sample
Use the Load sample button or Sample menu to paste a valid example.
Input
10
Output
3628800
Use Cases
- Calculating permutations and combinations in mathematics.
- Solving problems in probability and statistics.
- Used in various algorithms and mathematical formulas.
- Determining the number of ways to arrange items in a sequence.