What is a midpoint composite chart?
A midpoint composite derives one chart from two natal charts. For each matching pair of planets, the calculator finds the midpoint along the shorter arc of the zodiac. These derived positions form the composite chart. It is a mathematical chart, rather than the sky at a new person’s birth.
How to use this tool
- Create or select the first birth profile. Enter the original birth date, local time and city for that person.
- Add the second profile and choose it in the comparison field. Each person keeps their own birth data; do not average their dates or locations yourself.
- Explore the composite wheel, then open Table or Aspects. The displayed planetary positions are derived midpoints, not either person’s original positions.
How to read composite positions
Start with the positions in the composite itself, then examine aspects between those derived positions. If you want to understand how the two source charts connect directly, open synastry using the same profiles.
Midpoints wrap around the zodiac boundary. For example, positions at 359° and 1° are only 2° apart; their short-arc midpoint is 0° Aries, not 180° Libra. Do not interpret the midpoint as an actual planet located there at a shared birth moment.
Before interpreting the result
The composite depends on the accuracy of both birth profiles. This tool’s planetary table lists midpoint positions and their aspects; it does not attach natal house numbers to those derived positions. A composite is not a compatibility score or a guaranteed relationship outcome.
Common questions
Is this a Davison relationship chart?
No. This tool uses planetary midpoints. A Davison chart is a different method based on a midpoint in time and place.
Should I enter an averaged birth date?
No. Enter each person’s own birth data in separate profiles. The calculator derives the planetary midpoints from those two natal charts.
Why are the positions different from synastry?
Synastry displays the original positions from both people. A composite produces a new set of midpoint positions, so you are looking at a different chart.
Further reading : Astrodienst: composite chart methods