# 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

n | n! | Description |
---|---|---|

0 | 0! = 1 | Factorial of 0 is 1 |

1 | 1! = 1 | Factorial of 1 is 1 |

2 | 2! = 2 | Factorial of 2 is 2 |

3 | 3! = 6 | Factorial of 3 is 6 |

4 | 4! = 24 | Factorial of 4 is 24 |

5 | 5! = 120 | Factorial of 5 is 120 |

6 | 6! = 720 | Factorial of 6 is 720 |

7 | 7! = 5040 | Factorial of 7 is 5040 |

8 | 8! = 40320 | Factorial of 8 is 40320 |

9 | 9! = 362880 | Factorial of 9 is 362880 |

10 | 10! = 3628800 | Factorial of 10 is 3628800 |

11 | 11! = 39916800 | Factorial of 11 is 39916800 |

12 | 12! = 479001600 | Factorial of 12 is 479001600 |

13 | 13! = 6227020800 | Factorial of 13 is 6227020800 |

14 | 14! = 87178291200 | Factorial of 14 is 87178291200 |

15 | 15! = 1307674368000 | Factorial of 15 is 1307674368000 |

16 | 16! = 20922789888000 | Factorial of 16 is 20922789888000 |

17 | 17! = 355687428096000 | Factorial of 17 is 355687428096000 |

18 | 18! = 6402373705728000 | Factorial of 18 is 6402373705728000 |

19 | 19! = 121645100408832000 | Factorial of 19 is 121645100408832000 |

20 | 20! = 2432902008176640000 | Factorial 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).