Factorial Calculator
Enter a positive integer to find its factorial (n!). We use high-precision math for exact results.
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Calculation Result
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What is a Factorial?
In mathematics, the factorial of a non-negative integer n is the product of all positive integers less than or equal to n. It is denoted by n!.
For example:
5! = 5 × 4 × 3 × 2 × 1 = 120
Factorials are widely used in combinatorics, probability, and statistics to calculate the number of ways objects can be arranged or selected. Note that 0! is defined as 1.