Ziweidoushu | Calculator

This is critical. ZWDS operates in 2-hour segments ( Shichen ); being off by even a minute can change your entire chart.

Most calculators, such as the One BluePrint tool , allow you to input your Gregorian (Western) date, which it then automatically converts to the Chinese Lunar Calendar. 2. Recommended Calculators Zi Wei Dou Shu API - Purple Star Astrology Ziweidoushu Calculator

Modern calculators like the YuanYu Core Calculator use longitude to adjust your birth time to True Solar Time . This is critical

A —often called "Purple Star Astrology"—is a digital tool used to plot a complex destiny chart based on your exact birth details. Unlike Western astrology, it uses a 12-palace grid and over 100 "stars" to map your life’s path. 1. Getting Your Chart: Input Requirements To get an accurate reading, you must provide: Unlike Western astrology, it uses a 12-palace grid