Inclusion-Exclusion Calculator

Apply the inclusion-exclusion principle to compute union sizes and exclusive membership for up to three sets.

|A| (Set A size)

|B| (Set B size)

|C| (Set C size)

|A∩B|

|B∩C|

|A∩C|

|A∩B∩C|

Tab to move between fields

|A∪B∪C| (Union Size)

180

Exclusive to A60

Exclusive to B35

Exclusive to C30

How to Use This Calculator

Enter the sizes of Set A, Set B, and Set C.
Input the pairwise intersection sizes for A and B, B and C, and A and C.
Enter the triple intersection size for A, B, and C.
Review the Union calculated via the inclusion-exclusion principle.
Use this to count elements satisfying at least one of several overlapping conditions.

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