Combinations Calculator (nCr) - Free, Instant, In Your Browser
Enter n (total items) and r (items chosen) to calculate the number of combinations.
How to use Combinations Calculator
- 1Enter the required date(s) and details above.
- 2Click Calculate - Combinations Calculator runs instantly, right in your browser.
- 3Read your result below.
Your file is processed in your browser and is never uploaded.
Frequently Asked Questions
What's the formula?
nCr = n! / (r! x (n-r)!).
Is my data sent to a server?
No - everything runs entirely in your browser with JavaScript. Nothing is uploaded.