Formula and method
This calculator uses the values you enter and applies the calculation immediately in your browser. The main output formulas are:
- Union (A or B):
overlap>setA || overlap>setB ? NaN : setA+setB-overlap - A only:
overlap>setA || overlap>setB ? NaN : setA-overlap - B only:
overlap>setA || overlap>setB ? NaN : setB-overlap
Some formulas are undefined for certain input combinations, such as division by zero, equal x-values in a slope calculation, or logarithms of non-positive numbers. In those cases the live tool reports that the result is undefined instead of displaying Infinity or NaN.
Examples
- Example: with Set A size = 30, Set B size = 25, Overlap (A and B) = 10, this calculator returns Union (A or B) = 45, A only = 20, B only = 15.
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Frequently asked questions
Is Two-Set Overlap Calculator free to use?
Yes. Two-Set Overlap Calculator is completely free, has no usage limit, and does not require an account, email, or API key.
Does Two-Set Overlap Calculator store or upload my data?
No. Two-Set Overlap Calculator calculates everything locally in your browser. Nothing you type is sent to a server or stored by SpecWhale.
How accurate is Two-Set Overlap Calculator?
Two-Set Overlap Calculator uses a standard formula (see the Method section above for the exact expression). For high-stakes financial, medical, or legal decisions, confirm the result with a professional or an authoritative source before relying on it.
Can I embed Two-Set Overlap Calculator on my own website?
Yes. Use the "Embed this tool" snippet on this page to add a free, working copy of Two-Set Overlap Calculator to your own blog post or page.
SEO and sharing notes
This page has a single clean canonical URL, descriptive metadata, breadcrumb structured data, and internal links to related tools. Supported calculators and converters can also copy a prefilled share link without changing the canonical index URL.