Free Tool · 八字排盤
Free BaZi Chart Calculator
Your Chinese birth chart — the Four Pillars of Destiny — calculated with astronomical precision. Free, instant, and never guessed.
10,000-year calendar · True solar time · Solar terms
Your birth details
Four data points become eight characters — your Four Pillars.
Your Four Pillars will appear here — year, month, day, and hour, mapped in gold on the night sky.
Reading your chart
Heavenly Stems 天干 & Earthly Branches 地支
Each of your four pillars is a pair: a Heavenly Stem (天干) on top — the ten characters that name an element and its polarity — over an Earthly Branch (地支) below, the twelve that name an animal, a season and a double-hour. Ten over twelve, cycling together, give the sixty 甲子 combinations. Four pillars × two characters = your eight characters (八字).
天干 · The Ten Heavenly Stems
Five elements × two polarities. The Yang form is the element at its most outward; the Yin form, the same element turned inward. Your Day Master is one of these ten.
地支 · The Twelve Earthly Branches
The twelve you already half-know: each carries a zodiac animal, its own element and polarity, and the two-hour slice of the day it governs. Your birth hour picks one of them.