Factorial Calculator

Calculate n! factorial and related values for counting and probability.

Maximum: 170 (JS number limit)

Calculation Steps

10×9×8×7×6×5×4×3×2×1
10! Factorial

1

1 digits

10!

1

10!!

1

Double factorial

10P5

0

10C5

0

Factorial Table

0! = 1
1! = 1
2! = 2
3! = 6
4! = 24
5! = 120
6! = 720
7! = 5,040
8! = 40,320
9! = 362,880
10! = 3,628,800
11! = 39,916,800
12! = 479,001,600
13! = 6,227,020,800
14! = 87,178,291,200
15! = 1,307,674,368,000
16! = 20,922,789,888,000
17! = 355,687,428,096,000
18! = 6,402,373,705,728,000
19! = 121,645,100,408,832,000
Documentation

Factorial Function

Factorial n! is the product of all positive integers from 1 to n. It counts the number of ways to arrange n distinct objects.

Factorial

Recursive

Zero

Frequently Asked Questions
How to Use

About the Factorial Calculator

What it calculates

This factorial calculator solves mathematical and statistical problems using standard formulas. Calculate factorials, permutations, and combinations.

When to use it

Use for homework, data analysis, exam prep, or quick verification of manual calculations.

Example

Adjust the inputs above to model your specific scenario with the Factorial Calculator.

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