Synastry Chart Calculator
Compare two birth charts to reveal compatibility patterns and relationship dynamics.
Person A
Person B
Ready for Your Personal Chart?
Get your complete natal chart with planetary positions, houses, and aspects.
Calculate My Natal ChartReading your synastry score
A high compatibility index reflects supportive aspects, but the presence of tension doesn't mean a relationship is doomed. Squares and oppositions can add spark and growth when both people communicate consciously. Review the harmony vs. tension weights in the report to balance the picture and identify where to focus conversations.
- Look for repeated themes—multiple supportive Venus aspects suggest natural affection, for instance.
- Cross-reference challenging Mars or Saturn connections with real-life dynamics to create practical strategies.
- Compare synastry with composite chart insights when you want to study the relationship as its own entity.
Synastry FAQ
What is a synastry chart?
It is a technique that compares two natal charts, highlighting planetary aspects and house overlays to show how you energize each other.
Do I need exact birth times?
Birth times unlock accurate house placements and Ascendant connections. Without them, focus on aspects between planets, which still offer plenty of insight.
Can synastry predict success?
Synastry maps potential strengths and challenges, but the outcome depends on communication, maturity, and shared goals. Use it as a tool for awareness and intentional growth.