BaZi · 八字 / 四柱
BaZi Four Pillars Calculator
BaZi / Four Pillars (八字 / 四柱) is the parent system — each birth pillar is encoded as a Heavenly Stem + Earthly Branch. Far more complex; bone weight is just a simplified version of the same data.
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Heavenly Stems (天干)
The ten Heavenly Stems representing the five elements in Yin and Yang polarity: Jia, Yi, Bing, Ding, Wu, Ji, Geng, Xin, Ren, Gui.
Earthly Branches (地支)
The twelve Earthly Branches corresponding to the Chinese zodiac animals and their elemental compositions.
Ten Gods (十神)
The relationship between each element and your Day Master: Companion, Rob Wealth, Eating God, Hurting Officer, and more.
Hidden Stems (藏干)
The stems hidden within each Earthly Branch, revealing deeper elemental influences in your chart.
Shen Sha Stars (神煞)
Auxiliary stars derived from classical texts that add nuance to chart interpretation.
Luck Pillars (大运)
Your 10-year luck cycles showing how your fortune evolves through different life phases.
What is BaZi / Four Pillars?
BaZi (八字, "eight characters") or the Four Pillars (四柱) encodes your birth year, month, day, and hour each as a pair of a Heavenly Stem (天干) and an Earthly Branch (地支) — eight characters in total. From the Day Master (the day pillar's stem) and the balance of the five elements, BaZi is read to understand character and life tendencies. The "bone weight" calculator is just a heavily simplified version of the same data.
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