Zodiac compatibility — check online
Pick two signs to see the compatibility percentage and the pair's character. Free, no sign-up.
Popular pairs
78 sign pairs live on this site. Precise synastry from two charts is calculated in Astro Orb. For one person, start with the birth chart.
Pair synastry↗FAQ
+How much can I trust sign compatibility?
Sun-sign compatibility is the first, most general layer: the base blend of elements and strategies. The real picture appears in synastry — overlaying two complete birth charts, where the Moon, Venus, Mars and cross-chart aspects all count.
+How is the percentage calculated here?
By classical rules: element combination (fire, earth, air, water), modality interaction, and the angular distance between signs (trines, squares, oppositions). The calculation is deterministic — one pair always gives one result.
+What's inside the full pair reading?
Synastry from two charts: feelings and passion, money and everyday life, communication, crisis points and the pair's resources. Plus AI answers to questions about your relationship.
+Do I need my partner's birth date?
Not for the sign-based reading — signs are enough. For precise synastry in Astro Orb you need both birth dates; times are helpful but optional.