Free Four Pillars calculation

Map your birth moment.

Use the local clock time recorded at birth. The calculator converts it through historical time-zone rules, birthplace longitude and true solar time.

01 Birth date and time

First name or initials Optional; used only to personalize the report. Birth date Local birth time I do not know the birth time. Omit the hour pillar.

02 Birthplace and time zone

Optional city and time-zone lookup

If you click “Search place,” the place text is sent to OpenStreetMap’s Nominatim service for coordinates. After you choose a result, the coordinates are sent to TimeAPI.io for an IANA time-zone suggestion. You can enter every field manually instead.

City and country

Birthplace label Longitude Degrees east are positive; west are negative. Latitude Stored for place transparency; not used in the current pillar formula. IANA time zone Use the zone that applied at the birthplace, not a numeric UTC offset.

03 Traditional calculation choices

Luck-cycle direction setting Traditional schools commonly use a binary birth-sex convention for major-cycle direction. Choose “omit” if you do not want this calculation. Zi-hour day boundary Repeated DST time Only matters when the same local clock time occurred twice.

This is a traditional metaphysical interpretation for personal reflection. It is not a scientific personality test, professional assessment or guaranteed prediction.