- Open the Factorial Calculator and find the main field: Input.
- Type your values in that field. The placeholder shows an example format (Enter input...).
- Click "Run" to compute the result in your browser.
- Read the result in the Result section. Use Copy to paste the output elsewhere.
Factorial Calculator
The Factorial Calculator computes the factorial of a non-negative integer.
Calculator
Enter the values described below, then run. Use Load sample to try a prefilled example when available.
Format hints
Enter input...
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
Enter input...
Output
Shown in the Result area after you click the action button.
Load sample
Use the Load sample button or Sample menu to paste a valid example.
Input
Enter input...
Output
Adjust values and run again; use Copy on the result if needed.
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.