# Factorial calculator

Factorial calculator lets you find the factorial of a given number with calculation steps. Enter your number and click calculate to start.

## Result

Factorial of 5 or 5! is

120

## How to calculate factorial?

To calculate the factorial of a number n or n!, we can multiply numbers from 1 to n to obtain the factorial of n.

Thus, factorial of 5 or 5! can be written as follows:

5! = 5 × 4 × 3 × 2 × 1
5! = 120

## Factorial table

nn!Description
00! = 1Factorial of 0 is 1
11! = 1Factorial of 1 is 1
22! = 2Factorial of 2 is 2
33! = 6Factorial of 3 is 6
44! = 24Factorial of 4 is 24
55! = 120Factorial of 5 is 120
66! = 720Factorial of 6 is 720
77! = 5040Factorial of 7 is 5040
88! = 40320Factorial of 8 is 40320
99! = 362880Factorial of 9 is 362880
1010! = 3628800Factorial of 10 is 3628800
1111! = 39916800Factorial of 11 is 39916800
1212! = 479001600Factorial of 12 is 479001600
1313! = 6227020800Factorial of 13 is 6227020800
1414! = 87178291200Factorial of 14 is 87178291200
1515! = 1307674368000Factorial of 15 is 1307674368000
1616! = 20922789888000Factorial of 16 is 20922789888000
1717! = 355687428096000Factorial of 17 is 355687428096000
1818! = 6402373705728000Factorial of 18 is 6402373705728000
1919! = 121645100408832000Factorial of 19 is 121645100408832000
2020! = 2432902008176640000Factorial of 20 is 2432902008176640000

## What is factorial?

Factorial is the product of all positive integers less than or equal to n, denoted by n! where n is a non-negative integer. The factorial of n also equals the product of n with the next smaller factorial. For example, that is because 5! = 5 × 4! = 5 × 4 × 3 × 2 × 1, The value of 0! is 1, according to the convention for an empty product (from Wikipedia).