Zodiac Compatibility Calculator

The calculator reads the two Sun signs: their elements, their modalities and the angle between them on the zodiac wheel. Each of the 78 pairs has a written reading with an overall score and separate scores for love, friendship and marriage. The scores follow the classical angles: signs 120° apart average about 85%, signs 150° apart about 53%.

Usually the signs of your own element and its partner element: Fire with Fire and Air, Earth with Earth and Water. Those pairings average 77–84% here, while the other mixes average 56–59%. Pick your sign in the chart to see all twelve matches ranked.

Scores here run from 48% to 88%. 80% or more is an excellent match. 60–79% is a good match with differences to work through. Under 60% means the two signs see things differently and the relationship takes more effort. The love, friendship and marriage scores show where the strengths and the friction sit.

Yes. Switch the calculator to birth dates and enter both. It works out each Sun sign from the Sun's position on that date, so you don't need to know the signs.

The Sun changes sign on a slightly different day each year and at a particular hour. If it changed on your birth date, the calculator shows the other possible sign so you can switch. Your birth time and place decide it, and a birth chart gives the exact answer.

It comes from astrological tradition and has no scientific evidence behind it. People use it as a language for temperament: who moves fast, who needs security, where two styles rub. The Sun sign is one layer. The Moon, Venus and the rising sign add more, and a synastry chart compares them.