Factorial Calculator

Calculate the factorial (n!) of a non-negative integer.

About this tool

Enter a non-negative integer (up to 170) and click 'Generate Result'....

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What is a Factorial Calculator?

A Factorial Calculator computes the product of all positive integers from 1 up to a given number 'n', denoted as n!. Factorials are fundamental in combinatorics, probability theory, and mathematical analysis.

How to Calculate a Factorial

1

Enter N

Input the non-negative integer for which you want to calculate the factorial.

2

Run Algorithm

Click 'Generate Result' to perform the recursive multiplication.

3

View Result

The resulting large number will be displayed on the screen.

Frequently Asked Questions

What is 0! (zero factorial)?

By mathematical definition, 0! is equal to 1.

Why is there a limit of 170?

171! exceeds the largest value a standard 64-bit floating-point number (used by JavaScript) can represent (approx. 1.8e308).

Where are factorials used?

They are used in calculating permutations and combinations, helping determine the number of ways to arrange objects.

Precise & Instant

Standard mathematical precision for your homework and research.

Mathematical Precision
No Server Delay
Completely Free
Easy to Use