Permutation & Combination Calculator
Calculator ToolsnPr and nCr with factorials
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History
All history →Permutation & Combination Calculator — at a glance
Count the ways to arrange or choose items — in a click.
n = 10
r = 3
Run
C(10,3) = 120
P(10,3) = 720
How to use it — step by step
Total number of items (n) and how many you pick (r).
1
Enter your values
Fill in the boxes. Sensible example values are already filled in for you.
2
Calculate
Press the button. The answer is worked out instantly on your device.
3
Read or copy the result
See the big answer and the extra details, then press Copy to keep them.
Pro tips
Small things that make the result better.
✦Use permutations when order matters (a race ranking).
✦Use combinations when order does not matter (picking a team).
✦Very large answers are shown in scientific form.
Quick facts
nPr & nCrboth shown
Exactbig numbers
Factorialof n and r
Freeno signup
Frequently Asked Questions
Permutation vs combination?+
Permutations count different orders as different results; combinations do not.
What is the largest n?+
You can use n up to 500.
Is my data safe?+
Yes. Everything runs inside your own browser. Your text, files and images are never uploaded to any server.
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