Combination Generator

Generate all possible combinations from a list of items.

Items (one per line)

Combination Size

Options

Allow duplicates (combinations with repetition) Order matters (permutations)

Total Items

Total Combinations

Type

Size Range

No combinations match the current filter.

Combinations (no repetition):
C(n,r) = n! / (r! × (n-r)!)

Combinations (with repetition):
C(n+r-1,r) = (n+r-1)! / (r! × (n-1)!)

Permutations (order matters):
P(n,r) = n! / (n-r)!

Combination: Selection where order doesn't matter (e.g., choosing team members)
Permutation: Arrangement where order matters (e.g., race positions)
With Repetition: Items can be selected multiple times
Without Repetition: Each item can only be selected once

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Build v1.0.0.154154 • Aug 14, 2025, 02:49 AM EDT

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