Resolve the effective year
The birth date is compared with Li Chun, the Start of Spring solar term. Dates before that boundary use the preceding year for this calculation.
Feng Shui · Ba Zhai
Kua Number Calculator
Calculate your Kua, or Life Gua, from your birth date and the traditional formula category. See the trigram, element, East or West group, and all eight Ba Zhai directions with the calculation steps left visible.
- Boundary
- Li Chun
- Result
- 8 directions
- Privacy
- Browser only
A reviewable calculation
How this Kua number calculator works
Many quick charts use only the printed birth year. This calculator also checks the solar-term boundary and shows every step used to reach the final Life Gua.
Apply the century formula
The last two year digits are reduced, then the calculator applies the documented pre-2000 or 2000-and-later formula for the selected traditional category.
Map number to directions
The final number resolves to a trigram, element, East or West group, and four favorable plus four challenging Ba Zhai directions.
Worked example
A male-category birth in 1978
For a date after Li Chun in 1978, the effective year remains 1978. The last two digits are 78: 7 + 8 = 15, then 1 + 5 = 6.
The pre-2000 male formula is 10 − 6 = 4. The resulting Life Gua is 4, Xun 巽, associated with Wood and the East Group in this Ba Zhai mapping.
Questions, answered
Kua number FAQ
The formula is simple only after the calendar boundary and traditional category are made explicit.
Related calculators
Explore a different traditional system
Kua focuses on Ba Zhai direction groups. The Four Pillars tool uses birth date, time, and place to construct a different calendar-based chart.