Discover Your Zodiac Compatibility

Your Complete Guide to Zodiac Compatibility

Zodiac compatibility is the art of comparing two star signs to see how well their personalities, needs and energies blend in love and life. For thousands of years, people have looked to the stars to understand relationships — and our free zodiac compatibility calculator makes that ancient wisdom instant and easy.

Every one of the 12 signs is shaped by three key ingredients: its element (Fire, Earth, Air or Water), its modality (Cardinal, Fixed or Mutable) and its ruling planet. When you compare two signs, these ingredients reveal where you'll naturally click and where you'll need to compromise. Signs that share an element usually understand each other effortlessly, while complementary elements — Fire with Air, Earth with Water — create balance and growth.

How our compatibility scores work

For every pairing we calculate five relationship dimensions — love, passion, communication, trust and long-term potential — and blend them into one overall compatibility percentage. These scores draw on classic astrological principles: element harmony, modality dynamics, and the special magnetic pull between opposite signs. Whether you're curious about zodiac love compatibility, star sign compatibility with a crush, or astrology compatibility with a long-term partner, you'll find a detailed report for all 78 sign combinations.

Sun signs are just the beginning

Sun-sign compatibility is a wonderful starting point, but real astrological chemistry lives in the full birth chart. A proper synastry reading compares both people's Moon, Venus, Mars and rising signs to paint a complete relationship picture. Use our calculator for a quick read, then dive deeper with our birth chart tools.