Relationship astrology
Zodiac Compatibility
In astrology, compatibility is explored through the lens of element, modality, planetary rulers, and the geometric relationships between two charts. Sun sign compatibility is the first layer — discover how your signs relate, and then go deeper with a full synastry reading.
Find your compatibility
Most searched pairs
The pairings astrology seekers ask about most — rich breakdowns for each.
Explore by sign
Select any sign to see all its compatibility pairings.
What is synastry?
Synastry is the branch of astrology that compares two people's birth charts to understand their relationship dynamics. By overlaying one chart on top of another, astrologers can see how each person's planetary placements interact — which planets form harmonious trines and sextiles, which form challenging squares and oppositions, and which merge in powerful conjunctions.
Sun sign compatibility is the first and most general layer of this analysis. A full synastry reading goes much deeper — comparing the Moon (emotional rhythms), Venus (love styles), Mars (desire and conflict), Saturn (commitment and structure), and more.
Elements and compatibility
Fire
Aries, Leo, Sagittarius
Spontaneous, passionate, and mutually inspiring.
Earth
Taurus, Virgo, Capricorn
Stable, sensual, and built for the long term.
Air
Gemini, Libra, Aquarius
Intellectually electric and socially fluent.
Water
Cancer, Scorpio, Pisces
Deeply intuitive, emotionally rich, and bonded.
Go beyond Sun signs
Get your full synastry chart on Astrelle — every planetary placement compared. See how your Moon meets their Venus, how your Mars aspects their Saturn, and where your deepest connection truly lives.
Get your synastry reading