Compare two birth charts with a free synastry chart. Enter birth data for both people to see inter-aspects, house overlays, and relationship compatibility indicators. No sign-up required.
Synastry is the branch of astrology that compares two people's natal charts to see how they interact. This tool takes both people's birth date, time, and location, calculates each chart separately, and then overlays them to find the inter-aspects between one person's planets and the other's, such as a Venus conjunct Moon or a Mars square Saturn. It also shows house overlays, meaning which houses in your chart the other person's planets fall into, which reveals the areas of life their presence tends to activate. Synastry is commonly used to look at romantic pairings, but it works the same way for friendships, family, and business relationships.