BaziTools.com was built to solve a glaring problem in English-language Chinese astrology: for decades, Western seekers were given oversimplified “birth-year animal horoscopes” or uncalibrated calculators that ignored geographic longitude, Equation of Time, and the Solar Lichun boundary.
Every calculation on BaziTools passes through our 5-Gate True Solar Time pipeline—accounting for exact birth longitude, Jean Meeus's Equation of Time, and historical Daylight Saving Time regimes worldwide.
Our structural rules, Ten Gods definitions, and Na Yin archetypes are cross-referenced directly against San Ming Tong Hui (三命通会), Di Tian Sui (滴天髓), Zi Ping Zhen Quan (子平真诠), and Qiong Tong Bao Jian (穷通宝鉴).
Your birth date, time, and city coordinates are computed instantaneously in your browser session. We never sell personal birth records or lock basic Four Pillars matrices behind deceptive paywalls.
Interested in mastering the written Chinese characters behind your Heavenly Stems, Earthly Branches, or custom BaZi name? Visit our sister site ChineseWorkSheet.com to generate printable Tianzige and Mizige stroke-order calligraphy worksheets.