Zi Wei Dou Shu

Zi Wei Dou Shu, the Purple Star system, places fourteen main stars across twelve palaces from a lunar birth date and hour. Enter a birth to see its chart. The calculator shows the placements and the conventions behind them, and it gives no overall verdict.

A chart describes tendencies in a traditional system. It cannot decide health, money, law, marriage or children.

Your birth details are calculated only in your browser. They are never sent, saved or put in a URL.

Date of birthTime of birth, on the local clockI do not know the timeTime zone of the birthplace

Sex recorded at birth

Required, because the traditional formula sets the direction of the ten-year periods and the 長生 stages from it. The chart cannot be drawn without it, and no default is offered.

Follow the book on four rulesOff by default, so the chart matches common modern practice. On follows 紫微斗數全書 for 壬化科 on 天府, a leap month moved whole to the next month, the ten-year periods starting one palace from the 命宮, and the 長生 stages running forward for men and backward for women.

Calculated in your browser. Your birth details are not sent anywhere, saved or put in a URL.

Zi Wei Dou Shu

Read further