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Zodiac Compatibility Calculator
Pick any two signs to instantly see their compatibility score, strengths, and challenges — free, no signup. Then go deeper with your real birth charts.
Quick answer
Pick two zodiac signs and the calculator scores their Sun-sign match: how their elements combine (the same element, or fire with air and earth with water, score well), whether both are fixed or both cardinal, whether they are opposite signs, and a traditional list of compatible signs. It is an instant first look, not synastry — which compares two full birth charts.
Pick two signs to reveal their compatibility score.
Frequently asked questions
How is zodiac compatibility calculated?
The score starts from the two signs’ elements: the same element or a complementary pair (fire–air, earth–water) scores well, other mixes lower. It rises for signs on the traditional compatible list and for opposite signs, and drops a little when both signs are fixed or both cardinal — two signs competing to steer. It is a Sun-sign reading: a starting point before full-chart synastry.
Is Sun-sign compatibility accurate?
Sun-sign compatibility is a useful first look, but it’s only one layer. Real relationship astrology (synastry) compares both people’s complete birth charts — Moon, Venus, Mars, and the aspects between them — which is where the deeper dynamics live.
Which signs are most compatible?
Signs of the same element, or of complementary elements (fire + air, earth + water), tend to flow most easily. But "challenging" pairings often create the most growth — compatibility is about understanding the dynamic, not avoiding friction.
Is this calculator free?
Yes — checking any two signs is free and instant, no signup. A free Aurae account saves your own chart; a synastry reading of both your real birth charts is part of Premium.