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Combination Calculator

Calculate combinations (nCr) for choosing r items from n. View calculation steps and visualize with Pascal's triangle.

Pascal's Triangle

1
1
1
1
2
1
1
3
3
1
1
4
6
4
1
1
5
10
10
5
1
1
6
15
20
15
6
1
1
7
21
35
35
21
7
1
1
8
28
56
70
56
28
8
1
1
9
36
84
126
126
84
36
9
1
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How to Use

Step 1

Enter Values

Enter Values

Enter n and r values

Step 2

Calculate

Calculate

Combination is calculated automatically

Step 3

Check Results

Check Results

Check result and formula

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Features

Instant Calculation

Calculate combination in real-time

Formula Display

Show nCr = n!/r!(n-r)! calculation steps

Pascal's Triangle

Visualize combinations with Pascal's triangle

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FAQ

The number of ways to choose r items from n items (order does not matter).

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