Birth Chart Compatibility
Enter two people's birth details to compute their synastry — inter-chart aspects, lunar phase match, elemental balance, and an overall compatibility score.
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Ready to See Your Cosmic Compatibility?
Enter both birth details to reveal how your charts interact and uncover your unique compatibility dynamics.
About This Tool
What Is Birth Chart Compatibility?
A birth chart compatibility reading — also called synastry — compares two natal charts to reveal how your planetary energies interact. It maps the angles between each person's planets and identifies areas of natural resonance, creative friction, and deep connection.
Unlike personality-based compatibility quizzes, synastry analysis works from the precise astronomical positions at birth, giving a detailed and nuanced picture of how two charts relate to each other.
What You'll Discover
Your Compatibility Report Includes
- 1How your Sun, Moon, and Rising signs interact with your partner's
- 2Which aspects create emotional harmony or productive tension
- 3Your combined elemental and modality balance
- 4An overall compatibility score with interpretations
Why People Explore Their Charts
A Tool for Self-Understanding
Millions of people explore astrology to better understand themselves, their relationships, and the recurring patterns in their lives.
12
Planets & Points
tracked in your chart
24h
Rising Sign Cycle
unique to your birth time
∞
Chart Combinations
no two charts alike
Example Compatibility Insight
Moon Trine Venus — Emotional Harmony
This aspect suggests a natural emotional understanding between partners. One person's emotional needs resonate deeply with the other's capacity for affection and warmth. It often produces a relationship where both parties feel seen and valued without effort.
Precision
Why Your Birth Time Matters
Astrology depends on the exact positions of celestial bodies at the moment you were born. Your birth time determines your rising sign — the zodiac sign ascending on the eastern horizon — as well as the placement of all twelve astrological houses.
These house placements influence how planetary energies express themselves across different areas of your life: career, relationships, home, and inner life. Even a difference of a few minutes can shift rising sign and house cusp positions meaningfully.
Birth time is optional — a chart without it is still rich with information. But if you have access to it from your birth certificate or hospital records, it is worth including.
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