What is the symmetric difference of two sets?

The symmetric difference (A △ B) is the set of elements that are in exactly one of the two sets — present in A or B but not in both. It equals (A − B) ∪ (B − A).

Are duplicate elements counted?

No. A set contains each element at most once, so duplicates inside a single input are removed automatically before any operation runs.

Is my data uploaded anywhere?

No — every operation runs locally in your browser and nothing is sent to a server.

Set Operations Calculator

Union, intersection, difference and symmetric difference of two sets.

Set operations calculator

Compute the four core operations of set theory on two sets: union (A ∪ B), intersection (A ∩ B), difference (A − B and B − A), and symmetric difference (A △ B).

Enter the members of each set separated by commas or new lines, pick an operation, and the result set updates instantly — all in your browser, with no network calls.