Kua Number Calculator

Your Kua number (ben ming gua) comes from your birth year and sex. It tells you which directions support sleep, work, and rest — and which ones quietly drain you.

Birth year

Sex at birth
Male Female

Calculate my Kua number

How the calculation works

Take the last two digits of your birth year and reduce them to one digit. Men subtract that digit from 10 (born before 2000) or from 9 (born 2000 or later). Women add 5 (before 2000) or 6 (2000+). If the result is 5, men use 2 and women use 8.

This is a traditional calculation, not a scientific measurement. Use it as a design prompt, not a rule you have to obey.