Birth details
Zi Wei needs the birth time to the two-hour period (时辰). If you're unsure, enter your best guess and compare the neighbouring hours under More.
Gender sets which way the 10-year periods run.
Time options
Unticked, 23:00–24:00 counts as the late Zi hour of the same day.
👋 New to Zi Wei Dou Shu? How to read your chart (1 minute)
- Your chart is 12 boxes, each one an area of life: Life (you), Wealth, Career, Spouse, Health and so on.
- Stars sit in the boxes. The big main stars describe that area most; the small ones add help (green) or trouble (red). In English each main star has a nickname, like Emperor or Wolf.
- Start with the Life box (its name is in colour): that's you. Tap any box to read about it; the box you tapped gets a dark outline.
- The ages in each box's corner are its 10-year chapter, when that area of life takes the lead. The purple outline is your chapter now; the shaded box is this year.
- Four tags: 禄 good fortune, 权 power, 科 recognition, 忌 the area to watch.
- An empty box has no main star, so it's read with the stars of the box opposite.
Zi Wei Dou Shu is a traditional way to reflect on yourself, not a prediction.
The 12 palaces 十二宫 · tap one
禄 good fortune 权 power 科 recognition 忌 watch · this 10-year period · this year
Every 10 years a different box of your chart takes the lead, and each year highlights another. Pick any date to look ahead or back.
10-year periods 大限
Unsure of the hour? 时辰
The life palace moves with the hour. See which neighbouring hour's life palace sounds more like you, and tap it to use it.
Saved charts
No saved charts yet. Use “Save chart” on the Chart tab.
From your BaZi charts
Charts saved in the BaZi app that have a birth time.
About Zi Wei Dou Shu
- Zi Wei Dou Shu (“Purple Star Astrology”) places 14 main stars and many minor ones in 12 palaces, each a part of life, from the lunar date and two-hour period of birth. It's a separate system from BaZi: BaZi reads balance and timing, Zi Wei the detail of each life area.
- The birth time is converted with the birthplace's time zone as it was then, with optional true solar time and the 23:00 rule: the same calculation as the BaZi app.
- Method: the common 紫微斗数全书 rules. The year changes at the lunar new year; a leap-month birth counts as that month to the 15th and the next month from the 16th; 庚 years transform 太阳, 武曲, 太阴, 天同.
- Checked against the open-source iztro library on nearly 5,000 random charts, with identical results. Star brightness (庙旺利陷) isn't shown yet.
- This is traditional interpretation, for reflection and fun, not prediction. Charts are kept in this browser only.