Free Synastry Chart Calculator Astrology Compatibility Free Synastry Chart Calculator Compare two birth charts and reveal the relationship energy between them. Person 1 Name Person 2 Name Person 1 Birth Date Person 2 Birth Date Person 1 Birth Time Person 2 Birth Time Person 1 Birth Place Person 2 Birth Place Person 1 Sun Sign AriesTaurus GeminiCancer LeoVirgo LibraScorpio SagittariusCapricorn AquariusPisces Person 2 Sun Sign AriesTaurus GeminiCancer LeoVirgo LibraScorpio SagittariusCapricorn AquariusPisces Calculate Synastry Reset 0% — — Emotional Bond 0% Communication 0% Compatibility 0%