Permutation Calculator
Calculate nPr — the number of ways to arrange r items from a set of n items (order matters).
How to Use This Calculator
- Enter your n (total items).
- Enter your r (items chosen).
- Click Calculate to see instant results with a step-by-step breakdown.
- Use the Share button to copy a link with your inputs pre-filled.
⚠️ Results are for informational purposes only. Always verify important calculations with a qualified professional.