Compare birthdays for romantic, family, friendship, or professional bonds and get a polished report you can share, print, or save.
Enter two birthdays and a relationship type to get an easy-to-read compatibility report with printable details.
Each relationship type is scored differently, because each one carries a different amount of shared history.
Why you and your mother-in-law read each other so differently
How your sign and your child's sign actually meet
The one relationship you did not choose and cannot resign from
What passes down between two generations that skipped one
Family by default, friends by choice
The chemistry that has nothing to do with romance
The calculator uses a local zodiac engine and deterministic compatibility rules so the same dates always produce the same report.
The calculator uses each person's zodiac sign, the elemental compatibility between those signs, a relationship modifier, and a deterministic score offset so the report stays consistent.
This report is for entertainment and cultural interest only. It is designed for fun exploration rather than scientific or clinical use.
Yes. The app includes relationship types for parents and children, siblings, cousins, grandparents, colleagues, and more.
The relationship modifier changes the final score and the interpretation so friendship, love, and family bonds each have a tailored insight.
Yes. The report includes a copyable link, an image card we can email you, and a print-friendly layout for sharing with others.
The report itself is generated locally in your browser. The details you submit may be logged to help us understand how the tool is used, but they are never shared publicly or tied to your identity unless you are signed in.
One chart for the whole family - every sign, the dominant element, and the pairings at either end.
Explore family and kinship connections in a simple format.
Create a polished family tree with guided prompts.
Turn your family history into a beautiful timeline.