BaZi · Zi Wei Dou Shu · Free comparison
Not sure of your birth time?
See how different birth hours change your BaZi and Zi Wei charts.
What changes with the hour?
Compare your Four Pillars, Life and Body Palaces, and Life Palace stars. The same birth date can produce different charts across the day.
Choose at least two possible windows. Every candidate is shown without a score or ranking.
How this comparison works
Each selected window uses the existing Kaucim BaZi and Zi Wei engines with the same Gregorian date and sex. The table compares calculated chart fields. It does not rank hours by personality or life events.
Which time and calendar rules apply?
Enter the date and time windows on your birth record. This tool does not convert birthplace longitude, historical time zones or daylight saving. BaZi solar-term boundaries use the calendar library's UTC+8 basis. Each period uses its starting hour as a reference; a solar-term transition inside the period is flagged for review.
Early Zi (00:00-01:00) and late Zi (23:00-24:00) are separate choices. Under the site's San He convention, late Zi stays on the entered date and uses its midnight pillars. All-day comparison therefore lists thirteen windows.
Can this recover my actual birth time?
Your actual time needs a birth record or other reliable evidence. This comparison shows how uncertainty affects the chart. A familiar description or agreement between charts cannot confirm a historical time.
Can I continue to a reading?
Yes. Continuing keeps the hour marked unknown, omits the BaZi Hour Pillar and shows an uncertain Zi Wei reference chart. Once you find a recorded time, enter it through the regular chart form.
Where are my saved inputs kept?
Save keeps the date, sex and selected windows in this browser on this device. You can load or clear them here. The comparison request is not added to your account or saved as a reading. Continuing to the regular chart opens its usual reading flow.