Combination Calculator (nCr)

Calculate the number of combinations (nCr) — how many ways to choose r items from n items without regard to order.

Enter n and r

Total Items (n)

Items to Choose (r)

Result

Enter values and click Calculate

A combination is a selection of items where order does not matter.

The formula is: C(n,r) = n! / (r! × (n−r)!)

Used in probability, statistics, and combinatorics problems.