Get Your FREE Love Compatibility Reading
Not sun-sign guesswork. We cast both birth charts, draw your real synastry wheel and score the actual planetary aspects between you two — in about a minute.
Start by choosing your gender:
Classical synastry uses it only to phrase your reading — every pairing works.
Your data is strictly private & secure. Only used for calculations. Never shared.
What is a synastry chart — and why it beats sun-sign matching
Sun-sign compatibility ("Aries + Taurus?") uses one planet out of ten. Synastry — the method professional astrologers actually use for couples — overlays your two complete birth charts and measures the precise angles between every pair of planets: your Moon to their Venus, your Mars to their Sun, and dozens more.
Each angle is an aspect. Trines and sextiles flow; squares and oppositions challenge; conjunctions fuse. The pattern they weave is the real astrological fingerprint of your relationship — emotional safety, conversation, desire, friction and staying power.
How the free compatibility calculator works
- 1
Two birth profiles
Dates, times (or noon if unknown) and birth places — that's all we need.
- 2
Real ephemeris math
We compute both charts to the exact degree and every aspect between them.
- 3
Your synastry reading
The wheel, three scores and interpreted aspects — strengths and growth edges.
Love compatibility — frequently asked questions
How accurate is a love compatibility test based on birth charts?+
Far more precise than sun-sign horoscopes. We compute both partners' full natal charts — Sun, Moon, Mercury, Venus, Mars and beyond, each at its exact degree — then measure the real angles (aspects) between your planets. Those angles, called synastry aspects, are what professional astrologers read for couples.
Do I need our exact birth times?+
No. If you don't know a birth time we use 12:00 noon — planets move slowly, so your compatibility aspects stay accurate. Only the house emphasis becomes approximate, and the reading tells you exactly which parts those are.
Is the compatibility test really free?+
Yes — the full chart, the synastry wheel and your three compatibility scores are free. Creating a free account unlocks the deeper sections (your friction points and what they mean for your future). No card required.
What is a synastry chart?+
A synastry chart overlays two birth charts on one wheel: one partner's planets ride the outer ring, the other's the inner ring. Lines between them mark the aspects — blue for flowing connections (trines, sextiles), red for the growth-demanding ones (squares, oppositions). It's astrology's classic tool for relationships.
Can I test compatibility with someone I'm no longer with?+
Absolutely. Many people run a reading to understand what happened, whether reconnection is written in the charts, or simply to close a chapter with clarity. The test includes relationship statuses from married to broken up.
Want a human reading between the lines?
Our live psychics read synastry charts every day — timing, intentions, and the question the chart can't answer alone.
Browse our psychicsExplore more: zodiac sign compatibility · tarot reading · daily horoscope