Factorial Calculator

Calculate the factorial of a number (n!). Supports large numbers.

Last updated: 2/3/2026

The factorial of a non-negative integer n, denoted by n!, is the product of all positive integers less than or equal to n.

Calculator Inputs

Enter a number (n)*

Enter values above to see your results

Enter an integer. We multiply n × (n-1) × (n-2) ... × 1.

Sequence:5 × 4 × 3 × 2 × 1= Multiply

Result:120= 120

By definition, 0! = 1.

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