How to find your Kua number

Your Kua number is a single digit between 1 and 9 (excluding 5) that identifies your auspicious and inauspicious compass directions in Ba Zhai (Eight Mansions) Feng Shui. It's calculated from your birth year and gender.

1. Step 1

   Determine your Ba Zi birth year

   Ba Zhai uses the Solar Calendar (Lichun, ~Feb 4) as the year boundary, not Jan 1. If you were born in January or early February before Lichun, use the PREVIOUS year for your calculation. This is the same boundary rule as Ba Zi.

   Example

   Born January 15, 2000 → use birth year 1999 (since Lichun 2000 is Feb 4).

2. Step 2

   For birth years 1900–1999 (males)

   Sum the last two digits of your birth year. Reduce to a single digit by repeated summing. Subtract that result from 10. The answer is your Kua. If the answer is 5, use 2 instead.

   Example

   Male born 1985: 8+5=13 → 1+3=4. 10−4 = 6. Kua = 6.

3. Step 3

   For birth years 1900–1999 (females)

   Sum the last two digits of your birth year. Reduce to a single digit. Add 5. Reduce again if needed. If the answer is 5, use 8 instead.

   Example

   Female born 1985: 8+5=13 → 1+3=4. 4+5=9. Kua = 9.

4. Step 4

   For birth years 2000+ (males)

   Sum the last two digits of your birth year. Reduce to a single digit. Subtract from 9. If the answer is 5, use 2 instead.

   Example

   Male born 2005: 0+5=5. 9−5 = 4. Kua = 4.

5. Step 5

   For birth years 2000+ (females)

   Sum the last two digits of your birth year. Reduce to a single digit. Add 6. Reduce again if needed. If the answer is 5, use 8 instead.

   Example

   Female born 2005: 0+5=5. 5+6=11 → 1+1=2. Kua = 2.

6. Step 6

   Identify your Group

   East Group Kuas: 1, 3, 4, 9. West Group Kuas: 2, 6, 7, 8. Each group has 4 auspicious and 4 inauspicious directions. Your bed, work desk, and front door should align with your auspicious directions for best Ba Zhai luck.