Birth Chart Compatibility Calculator
Discover the astrological compatibility between two individuals based on their Sun signs, elements, and modalities. While a full synastry reading involves many planetary positions, this calculator provides a simplified yet insightful look into core compatibility dynamics.
Person 1 Details
Person 2 Details
Compatibility Results
Overall Compatibility Score: N/A
Interpretation: Enter birth dates and click 'Calculate' to see your compatibility.
Understanding Birth Chart Compatibility (Synastry)
Birth chart compatibility, often referred to as synastry in astrology, is the art of comparing two individual birth charts to understand the dynamics of their relationship. It reveals areas of harmony, challenge, attraction, and growth between two people. A full synastry reading involves analyzing the aspects (angles) between all planets and points in both charts, such as the Sun, Moon, Mercury, Venus, Mars, Jupiter, Saturn, Uranus, Neptune, Pluto, Ascendant, and Midheaven.
The Role of the Sun Sign
The Sun sign is one of the most fundamental components of a birth chart, representing your core identity, ego, and life purpose. While it's just one piece of the puzzle, Sun sign compatibility offers a basic yet insightful glimpse into how two personalities might interact. This calculator focuses primarily on Sun sign compatibility, considering the elemental and modal qualities of each sign.
Elements in Astrology
There are four astrological elements, each associated with three zodiac signs and representing fundamental energies:
- Fire Signs (Aries, Leo, Sagittarius): Passionate, energetic, enthusiastic, and often impulsive.
- Earth Signs (Taurus, Virgo, Capricorn): Practical, grounded, stable, and focused on tangible results.
- Air Signs (Gemini, Libra, Aquarius): Intellectual, communicative, social, and analytical.
- Water Signs (Cancer, Scorpio, Pisces): Emotional, intuitive, empathetic, and deeply feeling.
Generally, signs of the same element (e.g., Fire with Fire) or complementary elements (e.g., Fire with Air, Earth with Water) tend to have an easier flow of energy. Opposing elements (e.g., Fire with Water, Earth with Air) can present challenges but also opportunities for growth and balance.
Modalities in Astrology
Beyond elements, zodiac signs are also categorized by modalities, which describe their mode of operation or how they initiate and sustain action:
- Cardinal Signs (Aries, Cancer, Libra, Capricorn): Initiators, leaders, and trailblazers. They like to start things.
- Fixed Signs (Taurus, Leo, Scorpio, Aquarius): Stable, determined, persistent, and resistant to change. They like to maintain things.
- Mutable Signs (Gemini, Virgo, Sagittarius, Pisces): Adaptable, flexible, changeable, and good at transitioning. They like to adjust and flow.
Compatibility between modalities can indicate how two people approach life and change. For example, two Fixed signs might be very stable but also stubborn, while a Cardinal and a Mutable sign might balance initiation with adaptability.
How This Calculator Works
This calculator determines the Sun sign for each person based on their birth date. It then assigns points based on the compatibility of their respective elements and modalities. A higher score suggests more natural harmony, while a lower score might indicate areas where conscious effort and understanding are needed to foster a strong connection. Remember, this is a simplified model and a starting point for exploring astrological compatibility.