YiInsight

YiInsight · Chinese astrology

Your birth, in four pillars.

Build a free BaZi chart from your local birth date and time. Find your Day Master and read the stems and branches behind it.

01 / Birth details

Tell us when you arrived

Use the region where you were born, even if you live elsewhere today.

Unlimited calculations. No account required.

How the calculation works

BaZi pairs a Heavenly Stem and an Earthly Branch for the year, month, day and hour. The stem of your day pillar is called the Day Master. It gives you a starting point for reading the other pillars in this tradition.

This calculator uses the recorded clock time at your birthplace. The year changes at Start of Spring (Li Chun), the month at a seasonal boundary, and the day at local midnight. Solar-term instants use your selected time zone. We use the start of the entered minute and the lunar-javascript 1.7.7 solar-term tables. Other ephemerides can differ by seconds near a boundary. We do not adjust to apparent solar time.

Your birth details stay in this tab. Only if you request an AI reflection are the calculated pillars sent for interpretation. Readings are for personal reflection.