Math & Statistics
Factorial Calculator
Calculate the factorial of a non-negative integer.
TOOL 48
Enter your values
Use the fields below to calculate your result.
Result
120
Input n5
Definitionn Ć (nā1) Ć ā¦ Ć 1
Formula: n! = n Ć (n ā 1) Ć ā¦ Ć 2 Ć 1, with 0! = 1.
How to use this calculator
What to enter
Enter or select the following as requested: Non-negative integer n. Follow the units, valid ranges, examples, and options displayed beside each field.
What the result means
The mathematical result follows the operation or function named by the calculator using the values or expression entered. Check the domain, sign conventions, integer requirements, and any restrictions shown by the tool.
When to use it
Use this to solve or verify an algebra, number-theory, sequence, or complex-number problem. Confirm the input format and check exact versus rounded output when precision matters.