Compatibility & Synastry Checker
Compare two birth charts with real synastry using the checker below. Instead of matching two sun signs, it reads the aspects between two full charts — how each person's planets meet the other's — to describe the actual dynamic between you.
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What you'll need
Both people's date, time, and place of birth. Accurate birth times give the fullest reading, since the rising signs and houses depend on them. With just dates you'll get a partial picture based on planetary signs — still useful, but incomplete.
What it shows — and what it doesn't
The checker reads the synastry between two charts: the inter-aspects, the emotional rapport, the points of ease and friction. That's a genuine portrait of how two people meet — a world away from a sun-sign match.
But one honest boundary, because it matters: a compatibility reading describes a dynamic, not a destiny. No score tells you whether a relationship will last or whether you should be with someone — that comes down to choices and character, not charts. And it's never a reason to judge or reject a person. If you're tempted to read two signs as a verdict, that's exactly the trap we unpack in why sun-sign compatibility is (mostly) wrong.
Frequently asked questions
How does this compatibility calculator work?
It compares two full birth charts using synastry — looking at the aspects each person's planets make to the other's — rather than just matching two sun signs. That's what makes it a real reading of a dynamic instead of a novelty score. You'll need both people's birth details.
What do I need to check compatibility?
Both people's date, time, and place of birth. The more accurate the times, the more complete the reading, since the rising signs and houses depend on them. With just dates you'll get a partial picture based on planetary signs.
Can a compatibility score tell me if a relationship will work?
No — and any tool claiming to is overreaching. Compatibility describes the texture of a connection, where it flows and where it stretches. It doesn't determine an outcome; that depends on choices, effort, and character. Read it as a mirror for understanding, never a verdict on a person.
For compatibility that's a conversation rather than a score, The Oracle reads the connection between two charts — across many kinds of relationship — as reflection on how you actually meet, not a verdict on whether you should.
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