Free Chinese astrology calculator
Build your Zi Wei Dou Shu
twelve-palace chart.
See the structural chart first: Life Palace, Body Palace, Five Element Bureau, main stars and transformations. International births use the recorded local time and the city’s historical daylight-saving rules.
Birth details
Enter the local date and time shown on the birth record. We apply the city's historical time zone and daylight saving rules.
Location data: Countries States Cities Database (ODbL 1.0).
If clocks changed at that time, we will ask which occurrence matches the birth record.
Chart settings
A birth time is required. Use the local date and time printed on the birth record; the selected city supplies historical time-zone and DST rules.
Before you calculate
Zi Wei Dou Shu calculator FAQ
What does this Zi Wei Dou Shu calculator show?
It calculates the Life Palace, Body Palace, Five Element Bureau, twelve palace roles, main stars, support stars and birth-year transformations.
Do I need an exact birth time?
Yes. The palace layout changes with the birth hour, so this calculator does not invent a chart when the birth time is unknown.
How are international birth times handled?
Enter the local time on the birth record and select the birth city. The calculator applies the city’s historical IANA time zone and asks you to resolve repeated daylight-saving times.
Is the result a prediction?
No. It is deterministic chart data. Different Zi Wei schools may use different transformation, late-hour and leap-month rules, so interpretation should remain conditional.