Calculation first
Birth Chart Compatibility Calculator
Compare two birth charts with synastry-style patterns and reflective compatibility interpretation.
A calculator-first page for relationship astrology searches that need more than Sun sign matching.
birth chart compatibility calculatorbirth chart compatibilityfree birth chart compatibility
How it works
ChartLumen resolves birth place, timezone, and chart facts first. AI receives structured JSON, not raw birth details alone.
Example output
Element balance, Moon contacts, and inter-chart patterns become practical reflection questions.
Safety note
Interpretations stay reflective and do not provide medical, legal, financial, crisis, or certainty-based future advice.
FAQ
Is compatibility prescriptive?
No. It does not tell users what decisions to make.
Can reports be shared?
Share pages can hide names and exact birth data.