Synastry Chart Calculator

Category: Entertainment

- June 02, 2025

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Analyze the astrological compatibility between two people by comparing their birth charts. This synastry calculator examines planetary aspects, house overlays, and composite elements to provide insights into relationship dynamics and compatibility.

Person 1 Birth Information

Name:

Gender:

Birth Date:

Birth Time:

Exact time important for accuracy

Birth City:

Birth Country:

Person 2 Birth Information

Name:

Gender:

Birth Date:

Birth Time:

Exact time important for accuracy

Birth City:

Birth Country:

Relationship Context

Relationship Type:

Relationship Duration:

Analysis Options

Analysis Depth:

Basic Detailed

Moderate (3/5)

Orb Tolerance:

Degrees of tolerance for aspects

Include asteroids (Chiron, Juno, etc.)

Include house overlays

Generate composite chart

Detailed interpretations

Understanding Synastry

Synastry is the astrological technique of comparing two birth charts to analyze the relationship potential between two people. It examines how the planets in one person's chart interact with the planets and houses in another's chart.

Key Synastry Elements

Planetary Aspects: Angular relationships between planets in both charts
House Overlays: Where one person's planets fall in the other's houses
Composite Chart: The midpoint chart representing the relationship itself
Element Balance: Distribution of fire, earth, air, and water signs
Lunar Nodes: Karmic connections and soul growth patterns

Major Aspects in Synastry

Conjunction (0°): Intense blending of energies, powerful connection
Sextile (60°): Harmonious, supportive, easy cooperation
Square (90°): Challenging, dynamic tension, growth through conflict
Trine (120°): Natural harmony, effortless understanding
Opposition (180°): Attraction of opposites, balancing act

Important Synastry Connections

Sun-Moon: Core identity and emotional compatibility
Venus-Mars: Romantic and sexual attraction
Moon-Moon: Emotional understanding and nurturing
Mercury contacts: Communication and mental rapport
Jupiter aspects: Growth, expansion, and shared philosophy
Saturn aspects: Commitment, structure, and long-term potential

Disclaimer: Synastry analysis is for entertainment and self-reflection purposes only. Astrological compatibility is one of many factors in relationships. This calculator provides simplified interpretations and should not be used as the sole basis for relationship decisions. Individual growth, communication, and mutual respect are essential for healthy relationships.

Compatibility Score Formula (Simplified):
Compatibility Score = Base Score + (Aspect Influence × Weight) + Elemental Harmony Bonus + Venus-Mars Bonus

What Is the Synastry Chart Calculator?

The Synastry Chart Calculator is a love compatibility tool that helps you explore the dynamics between two individuals based on their birth information. This romantic compatibility tool analyzes how the positions of planets in each person's birth chart interact, revealing relationship patterns, emotional connections, and potential areas of harmony or tension.

It's ideal for anyone interested in understanding a romantic connection, evaluating a potential partner, or simply gaining insights into a relationship. Whether you're curious about a crush compatibility score or checking long-term partner compatibility, this calculator offers a guided way to explore those questions.

How Does It Work?

The calculator uses astrology principles to compare two birth charts. It evaluates:

Planetary Aspects: The angles between planets in each chart to assess influence and compatibility.
House Overlays: How one person’s planets fall into the life areas (houses) of the Other person’s chart.
Composite Chart: A combined chart that represents the relationship as a single entity.
Elemental Compatibility: Balance of fire, earth, air, and water signs to gauge emotional synergy.

All these elements are then used to calculate an overall compatibility score, similar to a relationship score or love match percentage.

Why Use the Synastry Calculator?

Relationships can be rewarding yet complex. This tool offers a structured way to reflect on how two personalities blend. Use it as a:

Love match test for dating insights
Partner match analysis for deepening commitment
Romantic compatibility check for long-term planning
Relationship match test for friendships or business ties

It's not a replacement for real communication or effort, but it can offer thought-provoking observations that enrich your perspective.

How to Use the Calculator

Enter names, birth dates, times, and birthplaces for both individuals.
Select the type and duration of your relationship.
Adjust advanced options like analysis depth or orb tolerance if desired.
Click “Calculate Synastry” to view results, including a compatibility score, charts, and detailed interpretations.
Review different aspects of your relationship using the tabs and analysis sections provided.

You can also reset the tool at any time to start over or try different inputs.

What Does the Compatibility Score Mean?

Your final compatibility score is a combination of astrological aspects and elemental harmony, reflecting how naturally your energies align. For example:

85–100%: Exceptional alignment and strong long-term potential
70–84%: Strong match with some growth opportunities
50–69%: Moderate connection; requires effort and understanding
Below 50%: High potential for misalignment, but not without hope

FAQs

Can this calculator predict the success of a relationship?

No, this tool offers insights and reflections—not predictions. Emotional maturity, communication, and shared values are still key to any successful relationship.

Do I need to know the exact birth time?

Yes, if possible. Precise birth times improve the accuracy of house placements and overall results. If the time is unknown, the tool will still work, but with less accuracy.

Is this the same as a Love Calculator?

This tool goes beyond a simple love calculator by including detailed relationship match factors like astrological aspects, elemental balance, and composite charts.

What types of relationships can be analyzed?

It supports romantic partnerships, friendships, business relationships, and family connections. Simply select the appropriate type from the dropdown menu.

How Can This Help You?

This tool is useful for anyone looking to check love compatibility or deepen their understanding of a current or potential relationship. It offers a gentle mirror into your dynamics and encourages reflection, conversation, and emotional insight.

Whether you’re trying to determine a romantic match or simply want to explore your relationship in a new light, the Synastry Chart Calculator is a helpful and engaging relationship compatibility test.