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Instant result
The result is updated directly from the data entered.
Online Calculator
Combination and permutation calculator
Calculate C(n,r) and P(n,r) using integers and exact BigInt results.
Combinations C(n,r)
120
Permutations P (n, r)
720
Information
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Local processing
The calculations are done in your browser without sending the values to a server.
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Free
No registration, subscription, or paid API required.
Frequently asked questions
What's the difference between combination and permutation?
Order does not matter in a combination, but it does in a permutation.
What values does it admit?
Integers with 0 ≤ r ≤ n.
Why is n limited?
It is limited to 500 to maintain manageable calculations and results in the browser.
Are the results accurate?
Yes. BigInt integers are used to avoid loss of precision in large integers.