Is this a synastry calculator?
Yes. It uses major cross-chart aspects to generate a compatibility snapshot between two charts.
Free Self-Discovery Tool
Birth Chart Compatibility Calculator
Free birth chart compatibility calculator. Run a synastry-style comparison with no signup required.
Questions
Do both people need birth time?
Exact birth time improves house and angle accuracy, but the tool can still compare planetary aspects without perfect times.
Does a low score mean a relationship will fail?
No. Dynamic aspects often signal growth work, not automatic incompatibility.