Composite Chart Calculator
Create a composite chart by finding midpoints between two birth charts. Discover the essence, purpose, and emotional dynamics of your relationship through composite astrology.
Person 1
Enter Person 1's birth information
First person's birth month
First person's birth day
First person's full birth year
First person's birth time (approximate is fine)
City where first person was born
Region, state, or province (optional but recommended)
Country where first person was born
Person 2
Enter Person 2's birth information
Second person's birth month
Second person's birth day
Second person's full birth year
Second person's birth time (approximate is fine)
City where second person was born
Region, state, or province (optional but recommended)
Country where second person was born
What is a Composite Chart?
The Relationship Itself
A composite chart is NOT about how two people interact - it reveals what the relationship itself IS as its own entity! Think of it like this: you + your partner = a third thing (the relationship) with its own personality, purpose, and energy. The composite chart shows the soul of your relationship!
Calculated by Midpoints
The composite chart is created by finding the mathematical midpoint between each planet in both people's birth charts. If your sun is at 10° Aries and your partner's sun is at 20° Gemini, the composite sun would be at the exact middle point. It's like averaging your charts to create a completely new chart!
Different from Synastry
Synastry compares two charts to see how you interact. Composite creates ONE chart representing the relationship itself. Synastry = "How do we affect each other?" Composite = "What IS our relationship?" Both are valuable but answer different questions!
The Big Three Matter Most
In composite charts, the sun, moon, and rising are super important! Composite Sun = relationship's core purpose and identity. Composite Moon = emotional needs and how you nurture the relationship. Composite Rising = how the relationship appears to others and how it approaches the world.
Works for Any Relationship
Composite charts aren't just for romantic relationships! You can create composite charts for friendships, business partnerships, parent-child relationships, or any significant connection. It shows the essence of ANY two-person dynamic!
The Relationship's Destiny
The composite chart reveals what your relationship is meant to accomplish or experience together. It shows the relationship's challenges, gifts, and ultimate purpose. This helps you understand why you came together and what you're meant to create or learn!
How Composite Charts Work
Step 1: Start with Two Birth Charts
You need both people's complete birth information:
- Sun sign (basic zodiac sign)
- Moon sign (emotional nature)
- Rising sign (how you appear to the world)
- For deeper work: all planets and exact birth times
Step 2: Find the Midpoints
Calculate the exact middle point between each placement:
Example: If Person 1 has Sun in Aries (0°) and Person 2 has Sun in Gemini (60°), the composite sun would be at 30° which is Taurus. You're literally averaging the two positions to create something new!
Step 3: Create the Composite Chart
Once all midpoints are calculated, you have a complete composite chart! This chart doesn't belong to either person - it represents the relationship itself. Read it like you would a birth chart, but remember it's describing the relationship's personality and purpose, not an individual person.
The Composite Sun
This is THE most important part! The composite sun shows the core purpose and identity of the relationship. What are you meant to create together? What's the relationship's main focus? The composite sun sign and house reveal the relationship's reason for existing. It's like the relationship's mission statement!
The Composite Moon
The composite moon shows the emotional needs of the relationship and how you nurture it together. What does this relationship need to feel emotionally fulfilled? How do you both instinctively respond when you're together? The composite moon reveals your shared emotional nature and what makes you both feel safe and loved.
Important Note
The composite chart shows potential and themes, but every relationship requires conscious effort! A "difficult" composite doesn't doom you, and an "easy" one doesn't guarantee success. Use it as a guide to understand what you're working with and how to nurture your unique connection.
✨ Pro Tip:
For the most accurate composite chart, you need exact birth times for both people to calculate houses and angles precisely. This simplified calculator uses just sun, moon, and rising signs as a starting point. A full composite chart from an astrologer includes all planets, houses, and aspects for a complete picture of your relationship's purpose!
Composite Sun Signs Explained
Composite Sun in Aries ♈
Purpose: Action, adventure, and blazing new trails together
Your relationship is about being brave, starting new things, and maintaining independence within togetherness. You inspire each other to be bold and authentic!
Composite Sun in Taurus ♉
Purpose: Building stability, security, and lasting beauty
Your relationship is about creating comfort, enjoying physical pleasures, and building something solid that lasts. Loyalty and reliability are your strengths!
Composite Sun in Gemini ♊
Purpose: Communication, learning, and mental stimulation
Your relationship thrives on conversation, variety, and intellectual connection. You're meant to learn together and keep things interesting through communication!
Composite Sun in Cancer ♋
Purpose: Emotional bonding, nurturing, and creating home
Your relationship is deeply emotional and focused on creating safety, family, and a nurturing environment. You make each other feel at home!
Composite Sun in Leo ♌
Purpose: Creativity, celebration, and shining together
Your relationship is about joy, creative expression, and celebrating life! You bring out each other's playful, confident side and aren't afraid to show your love proudly.
Composite Sun in Virgo ♍
Purpose: Improvement, service, and practical support
Your relationship focuses on helping each other grow, being of service, and paying attention to the details. You refine each other and work well as a team!
Composite Sun in Libra ♎
Purpose: Balance, harmony, and true partnership
Your relationship is about equality, beauty, and being perfect partners. You teach each other about compromise and create harmony together!
Composite Sun in Scorpio ♏
Purpose: Transformation, depth, and intense bonding
Your relationship goes DEEP! It's about emotional intensity, transformation, and complete trust. You're meant to evolve and empower each other profoundly!
Composite Sun in Sagittarius ♐
Purpose: Adventure, growth, and seeking truth together
Your relationship is about exploring, learning, and expanding horizons! You need freedom and adventure to thrive, and you inspire each other's quest for meaning!
Composite Sun in Capricorn ♑
Purpose: Achievement, responsibility, and building legacy
Your relationship focuses on long-term goals, creating something lasting, and achieving together. You take the relationship seriously and build for the future!
Composite Sun in Aquarius ♒
Purpose: Innovation, friendship, and making a difference
Your relationship values independence, uniqueness, and contributing to something bigger. You're friends first and embrace each other's quirks!
Composite Sun in Pisces ♓
Purpose: Spiritual connection, compassion, and dreaming together
Your relationship is deeply intuitive and spiritual! You share dreams, creativity, and unconditional love. Your connection transcends the physical world!
Composite vs. Synastry - What's the Difference?
Composite Chart
What it shows: The relationship itself as its own entity
How it's calculated: Midpoints between two charts create one new chart
Questions it answers:
- What is the relationship's purpose?
- What is this relationship meant to achieve?
- What does the relationship need to thrive?
- What is the relationship's personality?
Best for: Understanding the relationship's destiny and core nature
Synastry Chart
What it shows: How two people interact and affect each other
How it's calculated: Compare two separate charts and see how planets aspect each other
Questions it answers:
- How do we communicate?
- Where do we clash or harmonize?
- What attracts us to each other?
- How do our energies blend?
Best for: Understanding compatibility and interaction dynamics
Which Should You Use?
Both! They complement each other perfectly:
- Use Synastry to understand your personal chemistry and how you interact day-to-day
- Use Composite to understand what your relationship is trying to become and its higher purpose
- Together they give you a complete picture: synastry shows the "how," composite shows the "why"
Real Example
Imagine your synastry shows Mars square Mars (lots of conflict and competition). That's challenging! But if your composite Sun is in Aries, the relationship NEEDS that fiery energy to fulfill its purpose of adventure and action. The "conflict" is actually fuel for growth! Synastry shows the friction, composite shows why that friction exists and how to use it constructively.
💡 Remember:
The composite chart is like looking at your relationship from the outside - what is this thing you've created together? Synastry is looking at it from the inside - how do we feel and behave when we're together? Both perspectives are valuable for a healthy, conscious relationship!
Using Your Composite Chart for Relationship Growth
1. Honor the Relationship's Purpose
Your composite Sun shows what the relationship is meant to DO or BE. Don't fight it! If your composite Sun is in Sagittarius, stop trying to create a super stable, routine relationship - it needs adventure! If it's in Cancer, embrace the homebody, emotional nature instead of forcing it to be super social and outgoing. Work WITH your composite chart, not against it!
2. Feed the Composite Moon
The composite Moon shows what the relationship needs emotionally to feel secure and happy. Regularly do things that nurture this placement! Composite Moon in Gemini? Have deep conversations and keep learning together. Composite Moon in Taurus? Create comfortable routines and physical affection. Starving your composite Moon leads to relationship unhappiness even if you personally feel okay!
3. Understand Challenging Placements
If your composite chart has "difficult" placements (like composite Moon in Capricorn which can feel emotionally restricted), don't panic! Every placement has gifts. Composite Moon in Capricorn creates incredible loyalty and long-term commitment. Work with the energy: show love through actions and building together rather than expecting constant emotional expression. Every challenge has a hidden strength!
4. The Composite Chart Doesn't Change
Unlike transits or progressions, your composite chart stays the same forever. It's the unchanging essence of your relationship! This means you can't "fix" a challenging composite, but you CAN learn to work with it consciously. Understanding is the first step to mastery. Your relationship has a specific nature - accept it and work within those parameters for maximum harmony!
5. Celebrate Your Composite Rising
The composite Rising shows how your relationship appears to others and how it approaches the world. Don't be fake, but be aware of this energy! If your composite Rising is in Leo, your relationship naturally draws attention and should be celebrated publicly. If it's in Scorpio, your relationship is naturally private and intense - don't force it to be super social just because that's what couples "should" do!
6. Use It for Big Decisions
When making relationship decisions (moving in together, getting married, starting a business), consult your composite chart! Does this align with your composite Sun's purpose? Will it nurture your composite Moon? A composite Sun in Capricorn probably wants marriage and traditional commitment. A composite Sun in Aquarius might prefer a more unconventional setup. Honor your relationship's unique nature when making choices together!
❤️ Most Important Tip:
The composite chart shows the POTENTIAL of your relationship, not a fixed destiny! Even a "perfect" composite requires conscious effort, communication, and mutual respect. And a "challenging" composite can become incredibly strong if both people are willing to work with the energy instead of against it. Astrology is a tool for understanding, not an excuse to avoid responsibility for making your relationship work! Use your composite chart as a guide to understand what you're working with and how to bring out the best in your unique connection.