Free Zodiac Compatibility Calculator

How this synastry calculator works

AstralWise compares two nativities using classical relationship factors: Venus and Mars contacts, Moon harmony, 7th-house themes, and overall planetary condition. That is synastry — chart-to-chart analysis — not a single “Aries + Leo = fire” label.

Prefer a faster mobile quiz first? Try the free “Does he love you?” compatibility test, then return here with full birth data.

Don’t know your Rising sign yet? Generate a free birth chart or use the Rising sign calculator.

What we look at in love compatibility

• Emotional bond — Moon aspects and caretaking styles
• Attraction — Venus/Mars chemistry
• Partnership house — 7th-house overlays when times are known
• Stability vs spark — Saturn, Jupiter, and friction aspects

FAQ

Is the compatibility calculator free? Yes.

Sun-sign only? No — we use full chart data when you provide it.

Best birth time source? Birth certificate or hospital record.