Day 1–71
Sun, Moon, Ascendant
- The three pillars
- Elements and modalities
- House framework
Astrology · Composite
Your shared chart
— the astrology of the relationship itself
A composite chart merges two birth charts into a single one — the horoscope of your relationship as its own being. It doesn’t show how you attract each other (that’s synastry); it shows who you ARE together. Free, with a plain-language reading.
Time of birth is optional — without it Sun, Moon and Venus positions are slightly less precise.
What you get
Your relationship as one chart
Two become one
We take the midpoints between your planets — your Sun and their Sun make the composite Sun. The result is a real third chart.
Sun, Moon, Ascendant — together
Where the composite Sun, Moon and Ascendant sit: the identity, the feeling and the face of your relationship.
Houses and aspects
Which life area (house) each shared planet falls in, and which tensions and talents shape your composite.
Explained in plain words
Every placement in everyday language — no jargon, even if you’re brand new to astrology.
How it works
Three steps to your composite
Enter both birth details
Date, place and — if you can — time for both of you. The time makes the shared Ascendant and houses precise.
Compute the midpoints
We calculate the exact midpoint between your two charts for every planet — with the Swiss Ephemeris engine, to the arc-minute.
Read your shared chart
You see the composite Sun, Moon, Ascendant and every planet in sign and house — with a reading.
Composite chart — frequently asked questions
- What is a composite chart?
- A composite merges two birth charts into one by taking the midpoint between both for every planet. The result is the horoscope of your relationship as a being of its own.
- How is it different from a compatibility chart (synastry)?
- A compatibility chart overlays your two charts and shows how you affect each other. The composite turns both into a single new chart — who you are together.
- Do we both need our birth time?
- For the composite planets in the signs, date and place are enough. For the shared Ascendant and houses you both need an accurate time.
- Is the composite chart free?
- Yes. You can calculate your composite chart here for free, with no sign-up.
Reviewed by Theresa Touhey · Astrologer & Tarot ReaderWho are you together?
Two birth details, one calculation — your composite chart in signs, houses and aspects. Instant, free, with a reading.
Calculate composite chartFree, no sign-up.
The Astro Academy
Learn Astrology & Tarot in 30 days.
5 minutes a day · quizzes, spaced review, streaks. Astrology, tarot, runes and numerology — structured from the ground up.
Day 8–142
Planets and their roles
- Personal planets
- Social & transpersonal
- Reading retrogrades
Day 15–213
Aspects and transits
- Spotting aspects
- Reading transits
- Working with moon phases
Day 22–304
Reading your own chart
- Chart synthesis
- Houses in daily life
- Your daily practice
„After 30 days I read my own chart — and honestly my friends’ too. The quizzes are what made it click.“
4,9 / 5
from 1,200+ reviews · 2,400+ active learners
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