Free Four Pillars Chart

Enter your birth data to see the four pillars, your Day Master, and how the chart is read. Nothing is stored or sent anywhere — the calculation runs in your browser.

Birth details

Date of birth

Your birth date as recorded locally at your birthplace.

Time of birth (local clock time)

The clock time at your birthplace when you were born.

I don’t know my birth time

Time correction settings

UTC offset at birth Select the offset… UTC−12UTC−11 UTC−10UTC−9:30 UTC−9UTC−8 UTC−7UTC−6 UTC−5UTC−4 UTC−3:30UTC−3 UTC−2UTC−1 UTC±0UTC+1 UTC+2UTC+3 UTC+3:30UTC+4 UTC+4:30UTC+5 UTC+5:30UTC+5:45 UTC+6UTC+6:30 UTC+7UTC+8 UTC+8:45UTC+9 UTC+9:30UTC+10 UTC+10:30UTC+11 UTC+12UTC+12:45 UTC+13UTC+14

Use the offset that applied at your birthplace on your birth date, including daylight saving if it was in effect then — not the offset where you live now.

Longitude (optional, for true solar time)

If left empty, no solar-time correction is applied. East is positive, west is negative.

Calculate chart

Convention: we distinguish early and late 子时 (23:00 starts the next day’s day pillar). Solar terms come from a precomputed table (1899–2101). Birth data is not stored, not put in the URL, and not sent to any analytics service.