Life and Destiny · Bazi
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Free Online Four Pillars Calculator · Solar Terms & True Solar Time
BaZi Calculator: Cast Your Four Pillars Chart and Timeline
Last updated: October 22, 2026
Enter your birth time and place for a free Four Pillars chart, adjusted to true solar time.
Enter Birth Details
- Unauthenticated chart calculation is done by program code only; we do not store or log these birth details or cache the chart result, and the preview is cleared when you close the page.
- Click "Sign up to save" to store your profile, unlock your interactive "Timeline" (Luck Pillars, annual, monthly, and daily cycles), and receive 200 Dao Points upon first registration.
Inside a BaZi Chart: How to Read the Core Rows
Sample Chart Note: The chart displayed below is a fictional sample chart (constructed from fictional birth inputs and verified with the chart calculation package solely to illustrate column and row structure; it does not represent any real person's birth record).
When you cast a chart, your natal structure is organized into four columns (Year, Month, Day, Hour) and structured rows. Below is a fictional four-pillar layout (Jia-Zi, Xin-Wei, Bing-Chen, Yi-Wei) illustrating how each row works:
Mr. Chen (fictional sample)Qian · Male · 1984-07-21 14:10 · Xuanwu District, Nanjing
YearRat
Month
Day
Hour
Ten God
Indirect Resource
Direct Wealth
Day Master
Direct Resource
Stem
甲
辛
丙
乙
Branch
子
未
辰
未
Hidden Stems
癸DO
己HO丁RW乙DR
戊EG乙DR癸DO
己HO丁RW乙DR
Na Yin
Metal in the Sea
Roadside Earth
Sandy Earth
Metal in the Sand
Life Stage
Conception
Decline
Cap and Belt
Decline
Self-sitting
Bathing
Decline
Cap and Belt
Nurturing
Void
戌亥
戌亥
子丑
辰巳
Month Command 未EarthProsperousMetalStrongFireRestingWoodTrappedWaterDead
Luck Pillars
1990壬申Seven Killings2000癸酉Direct Officer2010甲戌Indirect Resource2020乙亥Direct Resource2030丙子Friend2040丁丑Rob Wealth
Ten Gods abbreviations: Friend=F, Rob Wealth=RW, Eating God=EG, Hurting Officer=HO, Indirect Wealth=IW, Direct Wealth=DW, Seven Killings=7K, Direct Officer=DO, Indirect Resource=IR, Direct Resource=DR, Day Master=DM.
Day Master (Day Stem) — Your Reference Point
In BaZi, the reference center of the chart is the Heavenly Stem of the Day Pillar, called the Day Master (ri zhu). In this fictional sample chart, the Day Stem is Bing (Yang Fire). Every Ten God label across the chart (Direct Wealth, Indirect Resource, Direct Officer) is calculated relative to this Day Master—not the birth-year zodiac animal.
Month Command (Month Branch) — The Seasonal Baseline
The Earthly Branch of the Month Pillar is determined by the 24 Solar Terms rather than the Gregorian month. On the chart, the Month Command row uses the Month Branch's element to assign each of the Five Elements one of five seasonal states: Prosperous / Strong / Resting / Trapped / Dead. In this sample chart, the Month Branch Wei belongs to Earth, so Earth is Prosperous, Metal is Strong, Fire is Resting, Wood is Trapped, and Water is Dead—making the Bing Fire Day Master Resting (here "Dead" is a state name, not its literal meaning).
Hidden Stems & Roots (Hidden Stems) — Support Beneath the Surface
Each Earthly Branch contains one to three Hidden Stems. When a Heavenly Stem finds matching elemental support inside the Earthly Branches, classical texts describe that stem as having roots (tong gen) in the chart.
Timeline (Luck Pillars, Annual & Monthly Cycles) — How Timing Unfolds
Your four natal pillars capture the clock of your birth moment. Once you save your profile in an account, the interactive Timeline beneath the chart lets you step through ten-year Luck Pillars, passing years (liu nian), solar-term months (liu yue), and optional daily pillars (liu ri).
- Ten God (Ten God)
- How each Heavenly Stem relates to the Day Master; a structural label, not a moral rating
- Heavenly Stem (Stem)
- The top character of each pillar, color-coded by its Five Elements category
- Earthly Branch (Branch)
- The bottom character of each pillar; sets the seasonal context and elemental roots
- Hidden Stems (Hidden Stems)
- Stems stored inside each Earthly Branch along with their Ten God labels
Frequently Asked Questions
Yes. Casting a chart, viewing the full chart, and saving one profile are free. Visitors can cast a chart without logging in to preview their four natal pillars. Creating a free account via email verification code or Google lets you save the profile, unlock the full interactive Timeline (Luck Pillars, annual, monthly, and daily cycles), and receive 200 Dao Points on your first sign-up.
In BaZi, the Hour Pillar—and near midnight, the Day Pillar—depends on True Solar Time at your birthplace rather than standard civil time zones. Furthermore, Solar Term transitions (which govern the Year and Month Pillars) occur at specific astronomical instants. Selecting your birth city allows Xiaodao to calculate local solar time and historical Daylight Saving Time automatically.
The popular zodiac usually changes on Chinese New Year (the first day of the first lunar month), whereas traditional BaZi switches the Year Pillar at Li Chun (Spring Commences, usually around February 4). For births between Li Chun and Chinese New Year, the two conventions give different animals—for example, someone born on February 9, 2024 has the Jia-Chen Dragon Year Pillar in BaZi while the popular zodiac still counts as Rabbit. See our Ben Ming Nian guide for details.
Birth hour and minute are required for date-based calculation; Xiaodao does not substitute a fake noon time when birth time is missing, because an assumed hour produces an unverified Hour Pillar. If you already know the eight characters of a chart, switch to the "Pillars" tab to search matching time windows between 1801 and 2099 and save a "By Four Pillars" chart preview.
Per Xiaodao's Privacy Policy, an unauthenticated chart calculation is done by program code only and is never sent to AI compute providers. We do not store or log these birth details, nor do we cache the chart result. The preview remains in your browser and is cleared as soon as you close the page unless you choose to sign up and save the profile.
Cast Your Four Pillars Chart in 30 Seconds
No credit card required to preview your chart or save your first profile. Enter your birth details above to verify your Day Master and four pillars, or read a full 11-chapter sample report first.
Free Online Four Pillars Calculator · Solar Terms & True Solar Time
BaZi Calculator: Cast Your Four Pillars Chart and Timeline
Last updated: October 22, 2026
Enter your birth time and place for a free Four Pillars chart, adjusted to true solar time.
Enter Birth Details
- Unauthenticated chart calculation is done by program code only; we do not store or log these birth details or cache the chart result, and the preview is cleared when you close the page.
- Click "Sign up to save" to store your profile, unlock your interactive "Timeline" (Luck Pillars, annual, monthly, and daily cycles), and receive 200 Dao Points upon first registration.
Inside a BaZi Chart: How to Read the Core Rows
Sample Chart Note: The chart displayed below is a fictional sample chart (constructed from fictional birth inputs and verified with the chart calculation package solely to illustrate column and row structure; it does not represent any real person's birth record).
When you cast a chart, your natal structure is organized into four columns (Year, Month, Day, Hour) and structured rows. Below is a fictional four-pillar layout (Jia-Zi, Xin-Wei, Bing-Chen, Yi-Wei) illustrating how each row works:
Mr. Chen (fictional sample)Qian · Male · 1984-07-21 14:10 · Xuanwu District, Nanjing
YearRat
Month
Day
Hour
Ten God
Indirect Resource
Direct Wealth
Day Master
Direct Resource
Stem
甲
辛
丙
乙
Branch
子
未
辰
未
Hidden
癸DO
己HO丁RW乙DR
戊EG乙DR癸DO
己HO丁RW乙DR
Void
戌亥
戌亥
子丑
辰巳
Month Command 未EarthProsperousMetalStrongFireRestingWoodTrappedWaterDead
Luck Pillars
1990壬申Seven Killings2000癸酉Direct Officer2010甲戌Indirect Resource2020乙亥Direct Resource2030丙子Friend2040丁丑Rob Wealth
Ten Gods abbreviations: Friend=F, Rob Wealth=RW, Eating God=EG, Hurting Officer=HO, Indirect Wealth=IW, Direct Wealth=DW, Seven Killings=7K, Direct Officer=DO, Indirect Resource=IR, Direct Resource=DR, Day Master=DM.
Day Master (Day Stem) — Your Reference Point
In BaZi, the reference center of the chart is the Heavenly Stem of the Day Pillar, called the Day Master (ri zhu). In this fictional sample chart, the Day Stem is Bing (Yang Fire). Every Ten God label across the chart (Direct Wealth, Indirect Resource, Direct Officer) is calculated relative to this Day Master—not the birth-year zodiac animal.
Month Command (Month Branch) — The Seasonal Baseline
The Earthly Branch of the Month Pillar is determined by the 24 Solar Terms rather than the Gregorian month. On the chart, the Month Command row uses the Month Branch's element to assign each of the Five Elements one of five seasonal states: Prosperous / Strong / Resting / Trapped / Dead. In this sample chart, the Month Branch Wei belongs to Earth, so Earth is Prosperous, Metal is Strong, Fire is Resting, Wood is Trapped, and Water is Dead—making the Bing Fire Day Master Resting (here "Dead" is a state name, not its literal meaning).
Hidden Stems & Roots (Hidden Stems) — Support Beneath the Surface
Each Earthly Branch contains one to three Hidden Stems. When a Heavenly Stem finds matching elemental support inside the Earthly Branches, classical texts describe that stem as having roots (tong gen) in the chart.
Timeline (Luck Pillars, Annual & Monthly Cycles) — How Timing Unfolds
Your four natal pillars capture the clock of your birth moment. Once you save your profile in an account, the interactive Timeline beneath the chart lets you step through ten-year Luck Pillars, passing years (liu nian), solar-term months (liu yue), and optional daily pillars (liu ri).
- Ten God (Ten God)
- How each Heavenly Stem relates to the Day Master; a structural label, not a moral rating
- Heavenly Stem (Stem)
- The top character of each pillar, color-coded by its Five Elements category
- Earthly Branch (Branch)
- The bottom character of each pillar; sets the seasonal context and elemental roots
- Hidden Stems (Hidden Stems)
- Stems stored inside each Earthly Branch along with their Ten God labels
Frequently Asked Questions
Yes. Casting a chart, viewing the full chart, and saving one profile are free. Visitors can cast a chart without logging in to preview their four natal pillars. Creating a free account via email verification code or Google lets you save the profile, unlock the full interactive Timeline (Luck Pillars, annual, monthly, and daily cycles), and receive 200 Dao Points on your first sign-up.
In BaZi, the Hour Pillar—and near midnight, the Day Pillar—depends on True Solar Time at your birthplace rather than standard civil time zones. Furthermore, Solar Term transitions (which govern the Year and Month Pillars) occur at specific astronomical instants. Selecting your birth city allows Xiaodao to calculate local solar time and historical Daylight Saving Time automatically.
The popular zodiac usually changes on Chinese New Year (the first day of the first lunar month), whereas traditional BaZi switches the Year Pillar at Li Chun (Spring Commences, usually around February 4). For births between Li Chun and Chinese New Year, the two conventions give different animals—for example, someone born on February 9, 2024 has the Jia-Chen Dragon Year Pillar in BaZi while the popular zodiac still counts as Rabbit. See our Ben Ming Nian guide for details.
Birth hour and minute are required for date-based calculation; Xiaodao does not substitute a fake noon time when birth time is missing, because an assumed hour produces an unverified Hour Pillar. If you already know the eight characters of a chart, switch to the "Pillars" tab to search matching time windows between 1801 and 2099 and save a "By Four Pillars" chart preview.
Per Xiaodao's Privacy Policy, an unauthenticated chart calculation is done by program code only and is never sent to AI compute providers. We do not store or log these birth details, nor do we cache the chart result. The preview remains in your browser and is cleared as soon as you close the page unless you choose to sign up and save the profile.
Cast Your Four Pillars Chart in 30 Seconds
No credit card required to preview your chart or save your first profile. Enter your birth details above to verify your Day Master and four pillars, or read a full 11-chapter sample report first.