Composite Chart Calculator
Your Relationship's Own Birth Chart
Merge two birth charts into one to reveal your relationship's core identity. See your shared purpose, emotional foundation, and internal dynamics through composite analysis.
Advanced Composite Chart Features
Discover why two become one and how your relationship has its own astrological identity
Midpoint Composite Chart
Precise midpoint calculations merge two birth charts into one unified chart. Each planet and house cusp is the midpoint of both charts, creating your relationship's own natal chart.
AI Relationship Entity Analysis
Advanced AI interprets your composite chart as a relationship entity with its own personality, emotional needs, communication style, and purpose.
Composite House Analysis
Discover which life areas your relationship naturally activates. See if your partnership focuses on home, career, creativity, communication, or spirituality.
Internal Aspect Dynamics
Explore the aspects within your composite chart to understand the relationship's internal harmony, tension, and developmental patterns.
How Composite Analysis Works
A guided six-step experience from merged chart generation to full relationship insight
Composite Chart Overview
See your merged relationship chart with all composite planet positions, signs, and house placements displayed in a single wheel.
Composite Planetary Positions
Explore where your merged planets land in the zodiac. The composite Sun shows your shared identity, Moon shows your emotional foundation, and Venus shows your love language.
Composite Houses
See which life domains your relationship is built to activate. Each house reveals an area where your partnership has natural focus and energy.
Composite Aspects
Analyze the internal dynamics within the composite chart. See which planets form harmonious or challenging connections within your relationship entity.
AI Composite Insights
Get personalized AI analysis of your relationship as a living entity, including its strengths, challenges, purpose, and growth potential.
Complete Composite Report
Download a comprehensive PDF covering every composite placement, aspect, and house interpretation for your relationship.
What You Will Learn from Your Composite Chart
Deep relationship insights that go beyond individual compatibility
Understand Your Relationship Identity
The composite Sun sign reveals what your relationship is fundamentally about and what drives it forward.
Discover Emotional Patterns
The composite Moon shows how you process emotions together and what makes you both feel secure.
See Your Shared Purpose
House placements reveal what your partnership is meant to focus on and where it naturally excels.
Identify Internal Tensions
Challenging composite aspects point to areas where the relationship faces friction and needs conscious effort.
Explore Beyond Romance
Composite charts work for business partners, close friends, family bonds, and any partnership where two people merge energy.
Complement Synastry Analysis
Synastry shows how two people interact. Composite shows what they become together. Use both for the full picture.
Midpoint
MethodPrecise shorter-arc midpoint calculations for accuracyReal
Sky dataCalculated from the actual sky at your exact date and timeFull Chart
AnalysisPlanets, houses, and aspects all included17
LanguagesComposite analysis and AI insights in multiple languagesComposite Chart vs. Synastry Chart
Two powerful tools that work best when used together
Composite Chart
The relationship as an entityMerges two charts into one using midpoints
Reveals the relationship's core identity and purpose
Shows the shared emotional foundation (composite Moon)
Has its own houses showing activated life areas
Internal aspects describe the relationship's dynamics
Best for understanding your partnership as a whole
Synastry Chart
How two people interactOverlays two separate charts for comparison
Shows cross-chart aspects between each person's planets
Reveals chemistry, attraction, and challenges
House overlays show where partners affect each other
Cross-chart aspects describe interpersonal dynamics
Best for understanding how you affect each other
Explore Related Chart Types
Combine composite analysis with other tools for the full relationship picture
Composite Chart FAQ
Common questions about composite chart calculations and relationship astrology
A composite chart creates a single merged chart from two birth charts using the midpoint method. For each planet and house cusp, it finds the midpoint between both charts. While synastry compares two separate charts to show interpersonal dynamics, the composite chart represents the relationship itself as a third entity with its own identity, needs, and purpose.
The composite chart uses the shorter-arc midpoint method. For each planet and house cusp in both charts, the midpoint is calculated. For example, if Person A's Sun is at 10 degrees Aries and Person B's Sun is at 20 degrees Gemini, the composite Sun would be at approximately 0 degrees Taurus (the midpoint of the shorter arc between them).
The composite chart reveals the relationship's core identity (composite Sun), emotional foundation (Moon), communication style (Mercury), love language (Venus), motivation and drive (Mars), and growth patterns (Jupiter, Saturn). House placements show which life areas the relationship naturally activates, from home life to career to creativity.
Both are valuable and serve different purposes. Synastry shows how two people affect each other, revealing chemistry, attraction, and interpersonal challenges. Composite shows the relationship as a whole, including its purpose and identity. For the most complete understanding, use both together. Many astrologers recommend starting with synastry and then adding composite for deeper insight.
Exact birth times provide the most complete composite chart, including house placements, the composite Ascendant, and Midheaven. Without exact times, the composite planet signs and aspects are still calculated accurately, but house information will not be available. Even an approximate time can still give useful house data.
Yes. Composite charts apply to any relationship where two people create a shared dynamic. Business partnerships, close friendships, parent-child relationships, and creative collaborations all generate meaningful composite charts. The chart reveals the nature and purpose of the connection regardless of its type.
Ready to Meet Your Relationship?
Enter birth details for two people and generate your composite chart to discover your relationship's astrological identity.