All calculators

Free browser-based tools for set theory and list operations. Pick a calculator below — no account required, results stay on your device.

Set Operations

Compute the union, intersection, or difference of two sets with formatting options and worked examples.

Generate every ordered pair from two sets (A × B). Ideal for combinations, grids, and product spaces.

Remove duplicates from a list while preserving first-seen order — turn messy lists into clean unique values.

Sort items A–Z or Z–A, or reverse the current order. Works with text and natural number ordering.