±Free
Exact factorial
Compute n! exactly as a decimal integer for 0 ≤ n ≤ 1000.
Enter a whole number n to multiply the integers from 1 through n. The result is displayed as a complete decimal string; the special case 0! returns 1.
How to use
- Enter your text, values, or image.
- Adjust the options and run the tool.
- Copy or download your result.
Worked example
Example input
Integer n: 5
Example result
120
Limitations and details
Only integers from 0 to 1000 are accepted; this calculator does not evaluate the gamma function for fractional inputs.
Inputs and options
- Integer n
- Number · Minimum: 0 · Maximum: 1000
Frequently asked questions
Is this tool free and private?
Yes. All 300 tools are free in this phase. Processing happens in your browser; your input and files are not sent to our servers.