Zodiac Compatibility — Compare Two Birth Charts
This reading compares two complete birth charts, rather than only sun signs, to show how two people suit each other. You provide a date of birth for each person — times and places where you know them — and the comparison is free.
How compatibility is calculated
Compatibility is calculated by drawing both birth charts and reading the angles between their planets — what astrologers call aspects. When one person's Venus makes a soft angle to the other's moon, the reading shows it and names it.
Each aspect carries its own meaning: some angles flow easily, some create spark and tension, and some ask for patience. The reading weighs them together, rather than counting them, so one deep bond can outweigh several small frictions.
What the comparison reveals
The comparison reveals where two people's needs meet and where they differ: how each loves, each argues, each rests and each grows. It speaks to emotional wiring through the moon, to affection through Venus, to drive through Mars.
It also shows the long-term shape of the bond — the patterns a couple returns to and the strengths they can lean on in hard seasons. No pairing is all ease or all friction; a good reading shows where the work and the gifts both live.
Beyond sun-sign compatibility
Venus in a compatibility reading shows how each person loves and what makes them feel cherished. When two Venuses meet kindly, affection comes naturally; when they clash, the partners show love in languages the other must learn to read.
Mars shows desire, energy and how each person pursues what they want. Mars contacts explain the chemistry between two people — and how they handle anger, competition and the heat of a disagreement.
The moon shows each person's inner emotional life: what comfort looks like and what they need when the day has been hard. Moon compatibility is often the truest test of whether two people can live gently under one roof.
Frequently asked questions
How is zodiac compatibility calculated?
Zodiac compatibility is calculated by comparing two complete birth charts, not just two sun signs. The positions of every planet in each chart are placed side by side, and the angles between them — the aspects — are read for harmony and friction.
Do I need both birth times?
Both birth times give the fullest reading, because they fix the moon sign and the rising signs. If one time is unknown, the comparison still works from the birth dates and places; only the rising signs and house positions become less exact.
Does this work for friendships and family?
Yes, the same chart comparison applies to any two people. Romantic pairs, friends, siblings and co-workers each get a reading of how their two charts meet — the method does not change with the relationship.
Is sun-sign compatibility accurate?
Sun-sign compatibility is only a first sketch, because it compares one placement out of many. Two people with supposedly incompatible sun signs can be deeply suited once their moons, Venuses and rising signs are brought into the comparison.
Two charts, side by side
Enter two birth dates and see how the charts meet — free, no email required.
Compare two charts free