Zi Wei Dou Shu birth chart — free calculator.Fate is not an
unknown fog.
Through the star arrangement of Zi Wei Dou Shu, sǹg-miā helps you decode the algorithm of your life. Enter your birth data and receive a personal soul user manual.
Supports leap-month handling, early/late Zi hour distinction, twin-chart calculation, and true solar time correction. Free to use, no registration required, no usage limit.
Generate a free Zi Wei Dou Shu chart, then read it in plain English
sǹg-miā calculates the chart with fixed Zi Wei Dou Shu rules first, then uses AI to turn the twelve palaces, major stars, and Four Transformations into a readable interpretation. The chart itself is not guessed by AI, so the same birth details produce a stable result.
Free chart calculator
Enter birth date, birth hour, gender, and optional location to generate the full chart structure before signing up.
AI chart interpretation
Use AI to explain the Life Palace, Wealth, Career, relationships, and annual timing in practical language.
Classical structure
Follow San Fang Si Zheng, Four Transformations, and palace interactions so the reading stays anchored in Zi Wei Dou Shu logic.
Continue learning:San Fang Si ZhengFour Transformations2026 forecast
Understanding Zi Wei Dou Shu
Start from zero and learn to read a chart in four weeks: concepts first, structure next, then practical application. This section is the starting point of the whole map.
What is Zi Wei Dou Shu?
Zi Wei Dou Shu is one of the most precise systems in traditional Chinese destiny studies. It is generally traced to the late Tang and early Song period and is associated with the Daoist astronomer Chen Tuan, also known as Master Xiyi. Based on a person's birth year, month, day, and hour, the system places stars into twelve palaces to form a unique birth chart — a snapshot of the sky at the moment of birth.
Unlike Western astrology, which uses planets in the solar system, Zi Wei Dou Shu uses its own star system. There are more than one hundred stars, with Zi Wei as the leading star, which is why the system is named Zi Wei Dou Shu. Its strength is precision: people born on the same day but at different birth hours can have very different charts. Even twins can have distinct chart handling depending on birth order.
Zi Wei Dou Shu can analyze many life areas, including personality, career development, finances, relationships and marriage, health, social dynamics, family background, and the changing fortune cycles of major periods and annual years.
Read more about the history and principles of Zi Wei Dou Shu →
What information is needed for chart calculation?
To generate a complete Zi Wei Dou Shu chart, you only need four pieces of information:
Solar birth date — The system converts it to the lunar calendar automatically and handles leap months correctly. If you only know your lunar birthday, you can switch to lunar input manually.
Birth hour — Zi Wei Dou Shu divides a day into twelve two-hour periods. The birth hour determines the position of the Life Palace and is one of the most important inputs. If you were born during Zi hour, between 23:00 and 01:00, it is important to distinguish early Zi hour and late Zi hour.
Gender — Gender affects the direction of the decade fortune cycle. In traditional rules, yang-year men and yin-year women move forward; the reverse combinations move backward. This is one of the major differences between Zi Wei Dou Shu and Western astrology.
True solar time correction, optional — Even in Taiwan, longitude can create a difference of roughly 10 to 20 minutes. sǹg-miā supports true solar time correction: enter the birth location and the system can correct the birth time, especially useful for people born near the boundary between two birth hours.
Chart calculation and interpretation: how the system works
Many people assume sǹg-miā is simply “AI fortune telling.” That is not accurate. We split the process into two parts and use the right tool for each.
Chart calculation uses our structured Zi Wei Dou Shu database, not AI — Calendar conversion, heavenly stems and earthly branches, placement of the fourteen major stars, auspicious and malefic stars, four transformations, decade periods, and annual cycles are calculated by our own Zi Wei Dou Shu engine. The rules are structured and reproducible, so a model update will not suddenly change the chart. We invested significant time organizing, verifying, and structuring traditional rules so the calculation layer is solid enough to support later interpretation.
AI is used for interpretation, with the strongest models available to us — Once the chart is calculated, personalized analysis is where AI is useful. Paid reports use top-tier models available in the market. When stronger models become available and clearly outperform the current generation, we will upgrade instead of leaving users on older model capability.
Why not build this as a chatroom? — Chat products often optimize for fast response and lower cost, which can push them toward weaker models. That increases the risk of hallucination or overly agreeable answers. We use a report format so a single topic, such as decade fortune, relationships, or career, can be analyzed from chart structure to practical advice with enough context and depth.
Advanced features — The calculator supports true solar time correction, early and late Zi hour distinction, lunar leap-month handling, and twin-chart calculation. Chart generation itself remains free, does not require registration, and has no usage limit.
How to read your chart in five steps
After you generate a chart, use these five steps to grasp the core structure:
Step 1: Find the Life Palace — The Life Palace is the center of the chart. It represents innate personality, outward image, thinking style, and the basic tone of life. The stars in this palace point to your most fundamental pattern.
Step 2: Read the major star in the Life Palace — The major star placed in the Life Palace shapes your basic personality. For example, Zi Wei in the Life Palace suggests natural leadership; Tian Ji indicates intelligence and adaptability.
Step 3: Read the sanfang sizheng structure — The Life Palace is not read in isolation. It forms a cross-structure with the opposite Travel Palace and the neighboring Wealth and Career Palaces. These four palaces are read together to understand the strength and pattern of the chart.
Step 4: Read the four transformations — Hua Lu, Hua Quan, Hua Ke, and Hua Ji are the dynamic energies of the chart. They indicate which palaces are activated. Hua Lu brings opportunity, while Hua Ji points to challenges and lessons.
Step 5: Read decade and annual cycles — The chart is not static. Every ten years a major cycle changes; every year an annual cycle activates different palaces and stars. Understanding the current cycle helps turn chart insight into better decisions.
Zi Wei Dou Shu vs. BaZi: quick comparison
Zi Wei Dou Shu
Star map
- OriginLate Tang to early Song, Chen Tuan
- Core elementsStars + palaces
- Smallest time unitBirth hour, two-hour block
- Chart structureTwelve palaces + more than one hundred stars
- Level of detailCan further distinguish cases such as twins
- Interpretation styleConcrete star and palace images; easier to visualize
- Timing methodsDecade + annual + monthly cycles
- Best suited forPersonality and life planning
BaZi / Four Pillars
Elemental energy table
- OriginTang dynasty, Li Xuzhong and Xu Ziping
- Core elementsHeavenly stems, earthly branches + five elements
- Smallest time unitBirth hour, two-hour block
- Chart structureFour pillars + luck cycles
- Level of detailPeople born in the same hour share the same chart
- Interpretation styleFive-element dynamics; more abstract
- Timing methodsLuck cycle + annual year
- Best suited forPattern quality and elemental balancing
Both systems have their strengths and are often better when read together. As a metaphor, BaZi is like an elemental energy table, while Zi Wei Dou Shu is like a star map.
The twelve palaces: twelve dimensions of life
Zi Wei Dou Shu divides life into twelve dimensions, and each palace governs a different area. Understanding the palaces is the first step in reading a chart. The four most important palaces are called sanfang sizheng: Life, Wealth, Career, and Travel. Together they form a cross-structure that defines the core pattern of the chart.
The soul of the chart. It represents innate character, outward image, thinking patterns, and the basic tone of life.
Sibling relationships, peer interaction, partnerships, and horizontal networks.
Relationship patterns, marriage quality, partner traits, and what you need in intimacy.
Children, parent-child dynamics, creativity, romance luck, and investment tendencies.
Earning ability, financial habits, money values, and the source and flow of wealth.
Innate constitution, likely health concerns, stress resistance, and psychological state.
Travel, relocation, external opportunities, adaptation in unfamiliar settings, and benefactor luck away from home.
Subordinates, employees, leadership dynamics, social circle quality, and teamwork.
Career direction, work attitude, suitable industries, and workplace performance.
Real estate, living environment, family atmosphere, inner security, and capacity to accumulate assets.
Inner world, spiritual pursuit, interests, worldview, and the ability to feel content.
Parents, elders, teachers, education background, family upbringing, and support from seniors.
The fourteen major stars: your core energy
The fourteen major stars are the center of Zi Wei Dou Shu. Each star has a distinct personality energy. They are grouped into Northern Dipper, Southern Dipper, and central luminaries. Learning the systems, yin-yang nature, five-element nature, and auspicious or challenging style of the stars is essential for deeper chart reading.
Northern Dipper system
Northern Dipper energy is faster, firmer, pioneering, and change-oriented. People with these stars in the Life Palace are often quick, action-driven, curious about new things, and unwilling to stay stuck.
Natural leadership, broad presence, strong opinions, and concern for dignity. Often suited to management and decision-making. Earth element, yin nature, auspicious star.
Multi-talented, social, attractive, and desire-driven. One of the most charismatic major stars. Wood element, yang nature, challenging star.
Strong speech, analysis, law, education, and media potential, but prone to disputes and verbal conflict. Water element, yin nature, challenging star.
Talented, emotionally rich, artistic, and internally complex. Relationships can be more turbulent. Fire element, yin nature, challenging star.
Firm, decisive, execution-oriented, and naturally strong with money. Efficient but not always socially smooth. Metal element, yin nature, challenging star.
Breaks old structures and reforms the status quo. Life can be unstable but vivid. Water element, yin nature, challenging star.
Southern Dipper system
Southern Dipper energy is slower, softer, stable, and accumulative. People with these stars in the Life Palace tend to be steady and suited to growth within systems.
Steady, generous, financially aware, and attentive to life quality. Like a safe vault in the chart. Earth element, yang nature, auspicious star.
Intelligent, observant, analytical, and adaptable, but prone to overthinking. Suited to planning, research, and technology. Wood element, yin nature, auspicious star.
Upright, responsible, trustworthy, and suited to support, administration, and stabilizing teams. Water element, yang nature, auspicious star.
Strong sense of justice, protective, helpful, and favored by elders. Suited to medicine, social service, and public roles. Earth element, yang nature, auspicious star.
Gentle, kind, content, and well-liked, but sometimes lacking ambition unless pushed. Water element, yang nature, auspicious star.
Action-oriented, decisive, courageous, and not afraid of challenge. Suited to entrepreneurship, military or police work, and sports. Metal element, yang nature, challenging star.
Central luminaries
Tai Yang and Tai Yin are the Sun and Moon stars. Tai Yang leans toward Northern Dipper qualities: fast, firm, and outward. Tai Yin leans toward Southern Dipper qualities: slow, soft, and inward.
Warm, open, helpful, and publicly influential, but may give too much and neglect the self. Fire element, yang nature, auspicious star.
Delicate, sensitive, romantic, intuitive, and suited to arts, culture, and service work. Water element, yin nature, auspicious star.
Four transformations: the dynamic energy of the chart
The four transformations are one of the most distinctive mechanisms in Zi Wei Dou Shu and a key to judging the flow of fortune. Each heavenly stem produces a set of four transformations, like four kinds of energy injected into different palaces.
Represents increase, abundance, and opportunity. The palace receiving Hua Lu becomes active and gains resources.
Represents power, control, and initiative. It strengthens execution and the desire to lead.
Represents reputation, recognition, and help from benefactors. It is the gentlest positive transformation.
Represents blockage, attachment, and life lessons. It does not simply mean bad luck; it marks the area requiring special care.
Heavenly stem four-transformation table
| Stem | Hua Lu | Hua Quan | Hua Ke | Hua Ji |
|---|---|---|---|---|
| 甲 | 廉貞 | 破軍 | 武曲 | 太陽 |
| 乙 | 天機 | 天梁 | 紫微 | 太陰 |
| 丙 | 天同 | 天機 | 文昌 | 廉貞 |
| 丁 | 太陰 | 天同 | 天機 | 巨門 |
| 戊 | 貪狼 | 太陰 | 太陽 | 天機 |
| 己 | 武曲 | 貪狼 | 天梁 | 文曲 |
| 庚 | 太陽 | 武曲 | 太陰 | 天同 |
| 辛 | 巨門 | 太陽 | 文曲 | 文昌 |
| 壬 | 天梁 | 紫微 | 天府 | 武曲 |
| 癸 | 破軍 | 巨門 | 太陽 | 貪狼 |
In practice, first read the natal transformations from the birth-year stem to understand the lifetime pattern, then read decade transformations for the current ten-year focus, and finally annual transformations for the year’s timing. These layers together produce the full interpretation.
Patterns and combinations: the chemistry of stars
When two or more major stars appear in the same palace or form key structural relationships, they create combination effects. Just like chemistry, one plus one is not simply two. Learning major patterns is the bridge from beginner reading to advanced interpretation.
Three classic patterns
Zi Wei Dou Shu has many patterns, but the best-known three are Sha Po Lang, Ji Yue Tong Liang, and Fu Xiang Chao Yuan.
Sha Po Lang — Qi Sha, Po Jun, and Tan Lang always form a sanfang sizheng relationship in the chart. This is the most pioneering and change-oriented structure. People with strong Sha Po Lang energy tend to be restless, dramatic, bold, and capable of letting go. It is common in entrepreneurs and reformers, though stability is often a life lesson.
Ji Yue Tong Liang — Tian Ji, Tai Yin, Tian Tong, and Tian Liang gather in specific chart relationships. This pattern is well-suited to development within organizations. It is gentle, refined, analytical, and good for public service, large companies, and professional fields.
Fu Xiang Chao Yuan — Tian Fu and Tian Xiang form a supportive alignment. This is one of the more stable patterns, associated with management ability, financial sense, order, and reliability.
Six major double-star combinations
When two major stars occupy the same palace, their energies blend. Six influential combinations are especially common.
Zi Wei + Tan Lang — The emperor star meets the romance star: ambition plus charm. This combination is friendly on the outside but opinionated within, suited to leadership roles requiring people skills.
Lian Zhen + Tan Lang — The prison star meets the romance star. Emotional life is especially rich. Talent is strong, but relationship paths can fluctuate. Creative or professional focus can turn this intensity into achievement.
Wu Qu + Tan Lang — The wealth star meets the romance star. Social ability and money instincts combine. It suits sales, public relations, and entertainment, but spending discipline is important.
Zi Wei + Qi Sha — The emperor star meets the general star. Powerful, decisive, and imposing. This can fit business ownership or senior management, but excessive dominance may create friction.
Lian Zhen + Qi Sha — Cool outside, intense inside, and very action-oriented. Suited to roles requiring courage and decisiveness, such as law, police or military work, and surgery.
Wu Qu + Po Jun — The wealth star meets the consumption star. This is a risk-taking financial combination. With risk control, high risk can become high return.
Empty palace and borrowing stars
Around one third of people have no fourteen major star in the Life Palace. This is called an empty palace. It does not mean a bad destiny; often, it means greater flexibility and adaptability.
When a palace is empty, you “borrow” from the opposite palace. For example, if the Travel Palace contains Tian Ji and Tai Yin, those qualities become the reference for the Life Palace, but because the energy is borrowed, it may be expressed more subtly.
People with empty Life Palaces are especially influenced by transformations and auxiliary stars such as Wen Chang, Wen Qu, Zuo Fu, and You Bi. If helpful auxiliary stars or Hua Lu/Hua Ke enter the palace, the flexibility can become a real advantage.
Six auspicious stars and six malefic stars
Beyond the fourteen major stars, auspicious and malefic stars play important supporting roles. They do not define the core personality in the same way, but they season the chart — strengthening good conditions or adding challenges.
Six auspicious stars: Wen Chang, Wen Qu, Zuo Fu, You Bi, Tian Kui, Tian Yue. Wen Chang and Wen Qu bring talent and literary or artistic quality; Zuo Fu and You Bi bring support; Tian Kui and Tian Yue are direct benefactor stars.
Six malefic stars: Qing Yang, Tuo Luo, Huo Xing, Ling Xing, Di Kong, Di Jie. They sound harsh, but they can act as whetstones. Qing Yang brings drive and competition; Huo Xing and Ling Xing bring explosive energy; Di Kong and Di Jie can bring creativity and philosophical depth.
Practical applications: turn the chart into decisions
After learning the basics, the most important question is how to use them. Zi Wei Dou Shu is not just for fortune telling; it helps turn chart structure into better life decisions.
Career choice: find the lane that fits you
For career direction, focus on three palaces: Life Palace, Career Palace, and Wealth Palace.
The Life Palace shows work style — Zi Wei and Qi Sha suit leadership; Tian Ji and Tian Liang suit advisory and technical work; Tan Lang and Tai Yang suit interactive roles; Wu Qu and Tian Fu suit finance and management.
The Career Palace shows professional direction — Pioneering stars such as Qi Sha, Po Jun, and Tan Lang suit entrepreneurship or new markets. Stable stars such as Tian Fu and Tian Xiang suit large organizations. Talent stars such as Wen Chang and Wen Qu suit cultural and creative fields.
The Wealth Palace shows earning mode — Hua Lu entering Wealth brings smoother money flow; Hua Ji entering Wealth means money requires more effort but may also be valued more deeply.
Relationship matching: understand how you interact
Relationship analysis focuses on the Spouse Palace, Life Palace, Spiritual Palace, and Travel Palace.
The Spouse Palace shows your ideal partner — Zi Wei in the Spouse Palace suggests attraction to people with presence and opinions. Tian Tong suggests a need for warmth. Qi Sha suggests attraction to strong and challenging personalities.
Cross-reading two charts — A deeper method compares two charts. If the star in your Spouse Palace is also the other person’s Life Palace star, the chart describes exactly the kind of person you tend to seek.
Transformations show timing — When Hua Lu enters the Spouse Palace in a decade or annual cycle, relationship opportunities increase. When Hua Ji enters, relationships require more careful handling.
Wealth analysis: understand your financial constitution
Wealth is not read from a single palace. A practical reading looks at the wealth triangle: Wealth Palace, Spiritual Palace, and Property Palace.
The Wealth Palace shows income source — Wu Qu in Wealth is a strong regular-income pattern; Tai Yin suits stable investment and finance; Tan Lang may bring side-income opportunities but is less stable.
The Spiritual Palace shows spending style — A strong palace suggests enjoyment and generosity; Hua Ji here can indicate impulsive spending and the need for a budget.
The Property Palace is the treasury — A strong Property Palace suggests the ability to store wealth or gain real estate opportunities. Hua Lu entering this palace can mean wealth entering storage; Hua Ji here requires care with property decisions.
Annual fortune: catch the year’s opportunity window
Every year has a different focus. Learning annual fortune helps you act at the right time.
Find the annual Life Palace — For example, 2026 is Bing-Wu year, so the Wu palace becomes the annual Life Palace. If that palace corresponds to your natal Career Palace, career becomes the year’s theme.
Where the transformations fly matters most — The palace receiving Hua Lu is the smoother opportunity area. The palace receiving Hua Ji requires special attention. Together, they define the year’s offensive and defensive priorities.
Monthly cycles refine timing — Monthly palaces and transformations can help time negotiations, confession, launches, or other important moves.
Health reminders: what the chart asks you to notice
Health is primarily read from the Health Palace, but the Life Palace and Spiritual Palace must also be considered.
The Health Palace shows constitutional tendencies — Tai Yang may point to eyes and cardiovascular concerns; Tai Yin to kidneys or gynecological themes; Tian Ji to liver, gallbladder, and nerves; Wu Qu to respiratory and musculoskeletal issues.
The Spiritual Palace shows mental wellness — Hua Ji or many malefic stars here can indicate anxiety or overthinking. It does not mean illness is certain, but it suggests the need for conscious stress-management habits.
Cycles show timing — When a major cycle enters the Health Palace or annual Hua Ji enters it, pay more attention to rest, immunity, and checkups. Zi Wei health analysis is a tendency reference and cannot replace medical diagnosis.
Frequently asked questions
Common questions about Zi Wei Dou Shu, chart calculation, and interpretation.
Q · 01Is Zi Wei Dou Shu accurate?
Accuracy depends on two factors: precise birth time and the skill of interpretation. If the birth time is correct, the chart arrangement is objective and consistent. sǹg-miā also supports true solar time correction to reduce geographic time offset. Interpretation traditionally depends on an astrologer’s experience; here, AI helps provide structured and systematic first-pass analysis.
Q · 02What data do I need?
You need birth date, birth hour, and gender. Birth date determines calendar and stem-branch data; birth hour determines the Life Palace; gender affects the direction of decade cycles. For higher precision, you can also provide birthplace for true solar time correction.
Q · 03Do I have to know the exact birth hour?
Birth hour is essential because it determines the Life Palace. If you are unsure, try adjacent hours and compare which chart better matches your personality. If the hour cannot be confirmed, noon can be used only as a low-confidence reference.
Q · 04What is true solar time?
True solar time adjusts standard clock time by birthplace longitude. For people born near the boundary between two birth hours, the correction may change the Life Palace and therefore the whole chart structure.
Q · 05How is Zi Wei Dou Shu different from BaZi?
Both use birth time, but their logic differs. BaZi focuses on heavenly stems, earthly branches, and five-element dynamics. Zi Wei Dou Shu places stars into palaces, so its symbols are more concrete and easier to visualize. They can complement each other.
Q · 06Are twin charts the same?
Not entirely. Traditional Zi Wei Dou Shu handles the younger twin differently by moving the Life Palace one palace counterclockwise. sǹg-miā supports twin-chart handling and can distinguish elder and younger twin logic.
Q · 07Can AI replace a professional astrologer?
Not completely. AI is fast, systematic, and less affected by emotion, but a professional astrologer can respond to complex personal context. sǹg-miā is an AI chart-analysis tool intended to provide fast, structured first insights.
Q · 08Do I need to register for the free calculator?
No. Chart generation is free and does not require registration. If you log in, your chart records can be saved securely for later review; without login, data is temporarily stored in the browser.
Q · 09Can chart results be saved or shared?
Yes. Birth data can be remembered in the browser. Logged-in users can save charts to their account, and sharing features can generate a dedicated link.
Q · 10What if the Life Palace has no major star?
That is called an empty palace. It does not mean a bad chart. You read the opposite palace and pay attention to auxiliary stars and transformations inside the Life Palace.
Q · 11How do decade cycles work?
A decade cycle is a ten-year fortune period. Each decade activates a palace and its stars. Reading the palace, its stars, and decade transformations shows the focus of that life stage.
Q · 12How do annual cycles work?
An annual cycle is a year-by-year focus. Locate the annual Life Palace from the year’s earthly branch, then read the stars and annual transformations to understand the year’s main themes.
Q · 13How can I read 2026 fortune?
2026 is Bing-Wu year. Find the Wu palace in your chart; it becomes the annual Life Palace. Then read the stars there and the Bing-year transformations to see opportunities and areas requiring care.
Q · 14What is the difference between free chart and paid report?
The free chart provides the complete calculation result: palaces, stars, transformations, decade cycles, and annual data. Paid AI reports use the chart structure to produce a deeper personalized interpretation.
Q · 15Does Hua Ji always mean something bad?
No. Hua Ji represents attachment, challenge, and a life lesson. It marks the area that needs more attention. Many successful people have Hua Ji in career areas because strong attachment can become achievement.
Q · 16How long does it take to learn Zi Wei Dou Shu?
A beginner can understand the basics in two to four weeks: first the twelve palaces, then the fourteen major stars, then the four transformations, and finally sanfang sizheng and fortune cycles.
Q · 17How are lunar leap months handled?
Leap-month births require special handling. sǹg-miā includes automatic lunar leap-month processing. Entering a solar birth date lets the system convert and handle leap-month rules correctly.
User stories: questions answered by the chart
Six real stories shared by users.
I realized my chart leans creative, which explains why data analysis felt so painful. After moving to brand-side work, going to work no longer feels like counting the hours.
The chart described my Wealth Palace as “can earn and can spend.” I started tracking expenses, and in three months my savings finally passed six figures.
Our charts showed one of us moves fast and the other slowly. After understanding this, we learned to give each other space, and arguments dropped by more than half.
The analysis said my current decade cycle supports independent development. It gave me the courage to resign, and my own company has now passed its first year.
The chart helped me see that my way of speaking is easy to misunderstand. Now I think more before speaking, and my colleague relationships have improved a lot.
After reading my son’s chart, I understood he is not simply rebellious; he is naturally independent-minded. Adjusting my parenting improved our relationship.
More Zi Wei Dou Shu services
The free chart helps you understand your outline. Paid reports provide more tailored answers for specific topics.
Decade analysis
Understand ten-year fortune trends and key turning points.
Relationship check
Understand relationship patterns and avoid recurring traps.
Social dynamics
Decode the interaction patterns shown in the chart.
Career development
Read your workplace strengths and direction through the chart.
Generate your own chart now
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