The feng shui kua numbers identify different human personalities and factors affecting their lives. These numbers go from 1 to 9 and are calculated from the Chinese lunar birth date. The lunar birth date starts around late January and early February sometimes, so if your birthday is around these months you should consult a chart for an accurate date.

The kua numbers are calculated differently for females than for males. For males, the kua number has to be calculated as follows: the two last numbers of their year birth should be added and then reduced to just one digit. That last digit should be deducted from 10 and the result is the kua number. For example, if you are a male who was born at 1958, you should first add 5 + 8 = 13. Then add 1 + 3 = 4, and then 10 – 4 = 6; that last digit would be your kua number.

If you are a female, you should calculate your kua number in the following way: first add the last two numbers of your birth date, then reduce it to one digit, and then add 5 to the result. For example, if you were a female who was born at 1966 you should add 6 + 6 = 12 and then add 1 + 2 = 3. Then add 3 + 5 = 8; that last digit would be your kua number.

There is an exception when the result is 5, either for males or for females, and that number must be changed for another. When this happens, and if you are a male, your kua number is 2, and if you are a female your number is 8. Therefore, kua numbers go from 1 to 9 but without having the number 5 in the list.

These numbers correspond to the main five elements. The kua number 1 corresponds to the element water, while the numbers 3 and 4 correspond to the element wood. The numbers 2, 5 and 8 correspond to the earth element and the numbers 6 and 7 to metal. The kua number 9 corresponds to the element fire.