Permutation & Combination is a verified mathematics & percentage calculation tool on Calcify. Calculate Permutations (nPr — order matters) and Combinations (nCr — order does not matter). All calculations execute locally in your browser with multi-currency support, visual breakdowns, and white-label client exports.
Choosing 3 items from a pool of 10
nPr = n! / (n - r)!; nCr = n! / [ r! × (n - r)! ]
Example Inputs: Total Items in Set (n): 10 · Items Selected (r <= n): 3
Example Output: Combinations (nCr) & Permutations (nPr): 10C3 = 120 | 10P3 = 720 (Choosing 3 items from a pool of 10)
The Permutation & Combination on Calcify applies the verified mathematical formula: nPr = n! / (n - r)!; nCr = n! / [ r! × (n - r)! ]. Every input is validated in real time with multi-currency formatting to ensure zero rounding or division errors.
Requires non-negative integers with 0 <= r <= n.
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