Zi Wei Dou Shu Chart Calculator
Enter a birth date, double-hour and gender to generate a complete Zi Wei Dou Shu chart: the twelve palaces, the fourteen major stars and their placements, the Five Element Bureau, and the ten-year decade cycles. It is free, requires no account, and the calculation runs entirely in your browser.
Free · no account needed
Zi Wei Dou Shu requires an accurate birth hour (2-hour window). Provide precise info for the most accurate chart.
The chart is calculated in your browser. Birth details are not uploaded or stored.
What you need to provide
- Birth date — solar (Gregorian) or lunar; a toggle switches between them.
- Birth double-hour (shichen). This is the single most important input: it fixes the Life Palace.
- Gender, which sets the direction the decade cycles run.
What the tool gives you
- A twelve-palace chart with each palace's stars, from Life and Wealth through Career, Travel and Marriage.
- Life Palace and Body Palace placement, plus the Five Element Bureau that sets the decade starting age.
- Per-palace detail on demand, and a decade-cycle timeline you can step through.
How to use it
- Fill in the birth date, pick the double-hour, and select gender.
- Generate the chart — the twelve palaces are drawn immediately.
- Click any palace to read the stars sitting in it, or open the timeline to see the decade cycles.
How it's calculated
- Your solar birth date is converted to the Chinese lunar calendar; the Life Palace and Body Palace are located from the birth month and double-hour.
- The Five Element Bureau is derived from the year stem and Life Palace, which sets where Zi Wei enters and how the fourteen major stars distribute across the twelve palaces.
- The four transformations (Hua Lu, Hua Quan, Hua Ke, Hua Ji) follow the birth-year stem; decade cycles start from the Bureau number.
What this tool does not do
Zi Wei Dou Shu is an analytical framework from a traditional system. It describes structure and tendency, not settled fact, and nothing here predicts a guaranteed outcome. Chart accuracy depends entirely on the birth hour being correct. For health, financial or legal decisions, consult a qualified professional — this tool is not a substitute.
Common questions
Do I need my exact birth time?
You need the correct double-hour (a two-hour block). The hour fixes where the Life Palace falls, and a wrong block rotates the entire chart, changing which stars land in which palace. If your birth time is uncertain, generate the adjacent hours as well and compare which reading matches your life more closely.
Should I enter a lunar or a solar date?
Either works — switch the lunar toggle to match the date you have. Zi Wei Dou Shu is built on the lunar calendar, so a solar date is converted internally before the palaces are laid out. Enter the calendar you actually know rather than converting by hand.
How is this different from a BaZi chart?
Both read the same birth data through different models. BaZi builds four stem-branch pillars and weighs Five Element strength; Zi Wei Dou Shu maps twelve palaces by life domain and reads which stars occupy each. Many practitioners consult both — you can generate a free BaZi chart on this site as well.
Learn the theory behind it
Star meanings, the twelve palaces, the Four Transformations and how placements combine are covered article by article in the Zi Wei knowledge base.
Open the knowledge baseRelated tools
Want the chart interpreted, not just drawn?
This calculator lays out the chart. In-depth readings apply it to a specific question — career direction, wealth structure, relationship timing — and are delivered as written reports.
Browse in-depth readings