Calculate the first starting age
The first major cycle does not always begin at age eight. Its starting age is derived from the birth moment and the relevant solar term.
Read how starting ages work →Enter your birth details to calculate when your ten-year cycles begin and see the eight stem-and-branch periods that follow.
Luck Pillars add a traditional sequence of ten-year contexts to the natal chart. They describe changing symbolic conditions, not guaranteed outcomes.
The first major cycle does not always begin at age eight. Its starting age is derived from the birth moment and the relevant solar term.
Read how starting ages work →Gender at birth and the birth-year stem polarity determine whether the sequence advances or reverses from the Month Pillar.
Review the Four Pillars first →A stem-and-branch pair becomes meaningful only when compared with the Day Master, element balance, Ten Gods, and interactions in the natal chart.
Inspect a complete reading sample →A Luck Pillar, or Da Yun (大运), is one stem-and-branch pair applied to an approximately ten-year stage of life. It is read alongside the fixed Four Pillars birth chart, not on its own.
The starting age comes from the birth moment, the relevant solar term, and whether the sequence runs forward or backward. It is calculated for the individual chart rather than assumed to begin at a universal age.
In the classical rule used here, gender at birth combines with the Yin or Yang polarity of the birth-year stem to determine whether the Luck Pillar sequence moves forward or backward from the Month Pillar.
Use the most accurate birth time you have. Birthplace supplies a local solar-time correction, which can matter when the recorded time is close to a two-hour or solar-term boundary.
The free result shows the calculated first starting age and eight ten-year Gan-Zhi periods with no account or email required. The optional one-time $4.99 reading explains how those periods interact with the rest of the chart.
No. They are a traditional timing framework, not a guarantee that a specific event will occur. Different BaZi schools can also use different start-age rounding conventions near a solar term boundary.