Eastern Affinity is a free, browser-based Chinese Zodiac Compatibility tool designed to bring ancient Eastern wisdom to a global audience. We believe the deep logic of Chinese astrology — Six Harmonies, Three Harmonies, and Six Clashes — offers genuine insight into human relationships.
Enter your birth date and your partner’s. Our algorithm maps each date to its corresponding Heavenly Stem and Earthly Branch, then evaluates the traditional compatibility rules:
All calculations happen in your browser — no data is sent to any server.
While Chinese Zodiac Compatibility is a deeply rooted tradition, very few high-quality English-language tools exist. We wanted to create something beautiful and accurate that anyone in the world can use and share.