Free Zi Wei Dou Shu Chart Calculator
Purple Star Astrology · True Solar Time · Three-School & Flying-Star Si Hua
What you get
A full 12-palace Zi Wei Dou Shu chart with 100+ stars placed by deterministic classical rules — the same method used by professional practitioners in Taiwan and Hong Kong. No AI guesswork: every star position is computed, then verified.
True solar time built in
Your clock time is corrected for your birthplace longitude and the equation of time before charting — the step most free calculators skip, which can shift the whole chart.
AI interpretation
After the chart is cast, ask our AI to read it in plain English. The AI only sees structured chart facts — it never invents star positions. First preview analysis is free.
Free · no sign-up needed for the chart itself · how it works · learn the system