Like our portal?
This project is funded by its author. Support us with any amount — it helps bring new free services.
Compatibility of two natal charts by Sun and Moon
Explanation revised: 2026-10-18
Synastry is the branch of astrology that compares the natal charts of two people to understand the harmony of their union. Our service matches the Sun signs (the essence of personality) and Moon signs (emotions) of both partners and shows a compatibility percentage with a short description. This helps see where the couple aligns and where understanding will be needed. The service is free.
Enter the birth dates of two people and press “Compare charts”. The service will match your Sun and Moon signs and show a compatibility percentage with an explanation.
Synastry is useful when you want a quick online result, a symbolic hint or a starting point for reflection. It is suitable for personal use, comparison of options and a calm pause before a decision.
The result is informational and symbolic. It does not replace professional advice and should not be used as the only basis for medical, legal, financial or other high-stakes decisions.