What input format do the sets accept?

Comma-separated values. Each item is trimmed of leading and trailing spaces. Duplicate values within a single set are ignored (sets contain unique elements by definition).

Are comparisons case-sensitive?

Yes. "Apple" and "apple" are treated as different elements. Convert your values to the same case before entering them if you want case-insensitive matching.

What is the difference between A − B and B − A?

A − B (also written A \ B) contains elements that are in Set A but not in Set B. B − A is the reverse — elements in Set B but not in Set A. These are called set differences or relative complements.

Can I enter numbers and text in the same set?

Yes. All values are treated as plain text strings, so you can mix numbers, words, or any other characters freely.

Is there a limit on how many elements I can enter?

There is no hard limit, but for readability the results list wraps into a scrollable area if it grows large. The Venn diagram shows region counts regardless of list size.

Venn Diagram Calculator

Enter two sets of comma-separated values to calculate union, intersection, and difference — with a visual Venn diagram.

Enter Your Sets

Set A

Set B

Only in A

Only in B

A ∩ B (both)

Neither

—

|A| (Set A size)

—

|B| (Set B size)

—

|A ∪ B| (Union)

—

|A ∩ B| (Intersection)

Summary

This tool computes the classic set operations — union, intersection, and difference — for any two sets you provide. Enter items as comma-separated values, and the calculator instantly shows you which elements are shared, which are unique to each set, and the totals for every region. A color-coded Venn diagram makes the relationships easy to understand at a glance.

How it works

Enter the elements of Set A as comma-separated values (e.g., 1, 2, 3, apple).
Enter the elements of Set B in the same way.
Click "Calculate" or type and the results update immediately.
The tool parses each input, trims whitespace, and removes duplicate values within each set.
Union (A ∪ B), intersection (A ∩ B), and both differences (A − B and B − A) are computed and displayed.
A canvas-drawn Venn diagram shades each region to match the results.

Use cases

Check which items two product lists have in common.
Find overlapping student names across two class rosters.
Compare two keyword lists to identify unique and shared terms.
Solve set theory homework problems step by step.
Audit two configuration files for common and differing keys.
Identify shared tags between two blog categories.

Frequently Asked Questions

Last updated: 2026-06-11 · Reviewed by Nham Vu