Davison chart calculator
The Davison chart is a real chart cast for the exact midpoint in time and the geographic midpoint between two births. Unlike the composite, it has a true date, place, and planetary positions.
What this calculator does
The midpoint time is the instant exactly halfway between the two birth moments. The midpoint place is computed on the sphere from the two sets of coordinates. A standard chart is then cast for that time and location.
This differs from the composite chart, which averages each pair of positions directly without a real moment in time. See also synastry.
Reference, not advice
This is cultural and astronomical reference, not personal prediction or advice.
The Davison chart is a mathematical midpoint construction. It is not a relationship recommendation, compatibility score, or prediction.
Last reviewed .