Free Astrology Chart Calculators
Built for relationship analysis.
Wide, easy-to-read charts, no clutter.
Share full charts with one link.
Natal
Your birth chart. Core emotional drives, behavior patterns, and relationship needs.
Open CalculatorSynastry
Two charts overlaid. Shows how two people relate to each other and what shapes the dynamic between them.
Open CalculatorComposite
The relationship as its own chart. Built from the midpoints of each person's planets and points.
Open CalculatorDavison
The relationship as its own chart. Built from the midpoint in time and space between two births.
Open Calculator
About these calculators
- House system: Placidus
- Composite chart: Midpoint method
- Davison chart: Uncorrected
- Calculations: High-precision astronomical data
- Optional points (toggle on): Vertex & Sun-Moon Midpoint, Lilith, Juno & Part of Fortune, Eros, Psyche & Amor