Calculation first
Synastry Chart Calculator
Compare two birth charts with reflective AI interpretation.
For users searching relationship chart comparison.
How it works
ChartLumen resolves birth place, timezone, and chart facts first. AI receives structured JSON, not raw birth details alone.
Example output
The report highlights support points, tension patterns, and communication prompts.
Safety note
Interpretations stay reflective and do not provide medical, legal, financial, crisis, or certainty-based future advice.
FAQ
Does it say soulmate?
No. It avoids deterministic labels.
Can both people use unknown time?
Yes, with time-sensitive limitations.