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Calculate the factorial of a given number.
About this tool
Calculate the factorial of a given number.
Calculate the factorial of any non-negative integer with this simple tool. Factorials are commonly used in combinatorics and probability calculations.
Open Factorial Calculator on AltFTool — it loads instantly in your browser.
Enter the values you already know.
Fine-tune the options to match your scenario.
Read the result and use it in your planning or reporting.
Get results instantly without manual computation.
Avoid human error with automated calculations.
Use for teaching factorial concepts in math classes.
A factorial of a non-negative integer n, denoted by n!, is the product of all positive integers less than or equal to n.
No, the factorial is not defined for negative numbers.
The tool is designed to handle reasonably large numbers, but very large inputs may result in performance issues.