Combinations
Combinations count unordered selections without replacement. Each set is counted once regardless of how its members are listed.
Combinations
Combinatorics · 2 inputs
How to use this calculator
- Enter available objects in count.
- Enter chosen objects in count.
- Select Calculate and keep the output unit with the answer.
Before you use the answer
Choose the reference quantity before interpreting the number. A ratio, a percentage and a percentage-point difference may use the same observations while answering different questions. For recorded data, keep the original values beside the summary so an unexpected result can be traced back to its inputs.
Repeated selections of the same object are excluded. Very large integer results are approximate.
Does it save my inputs?
No calculation history is stored by this website. The calculator works locally in your browser. See the privacy policy for hosting and contact details.
Why might a result be approximate?
Measurement uncertainty, ideal-model assumptions and floating-point rounding can all matter. Displaying more digits does not improve the original measurement.
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