CalcWorkspace
CalculatorMath

Factorial Calculator

Calculate n! for integers from 0 to 170. For example, 5! = 120 and 0! = 1. Large results use floating-point approximation.

Instant · no account

Input

Enter your values

Method

How it works

Change any input above and the result updates instantly. The formula or method used by this tool is shown below.

n! = 1 × 2 × … × n; 0! = 1.

Keep going

Related tools

Explore more tools from Math and similar workflows.

Annulus Area Calculator→Circle Area and Circumference Calculator→Combinations Calculator→Cone Volume Calculator→Cylinder Volume and Surface Area Calculator→GCD and LCM Calculator→Mean Absolute Deviation Calculator→P-Value Calculator→

Quick answers

About this tool

What does the Factorial Calculator do?+

Calculate n! for integers from 0 to 170. For example, 5! = 120 and 0! = 1. Large results use floating-point approximation.

How does this calculator calculate the result?+

It uses this method: n! = 1 × 2 × … × n; 0! = 1.

Are my inputs saved or sent to an account?+

Core CalcWorkspace tools require no account, and most calculations run locally in your browser. Favorites and recent-tool history, when used, stay in this browser.