Permutations & Combinations Calculator
Calculate permutations and combinations with or without repetition for any n and r values.
Inputs
Results
Result
120
Formula TypeCombination C(n,r)
log₁₀(Result)2.079
How to Use This Calculator
- Enter n (total items) and r (items chosen).
- Select the Type: Permutation (order matters), Combination (order irrelevant), Permutation with Repetition, or Combination with Repetition.
- Review the Result and the Formula Type applied.
- For very large values, use log10(Result) to work with the magnitude without overflow.
- Compare all four types side by side to understand the effect of repetition and ordering assumptions.
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