InsightBaZi

npx add-mcp 'https://www.insightbazi.com/api/mcp'

InsightBaZi is a free BaZi calculator and Four Pillars chart tool

Enter a birth date, recorded time, timezone, and optional birthplace to generate a Four Pillars chart. The page shows the Day Master, Ten Gods, Hidden Stems, Five Elements, true solar time, and Da Yun timing in a layout you can inspect.

What you can inspect

Input	Rule	Visible output
Recorded time + timezone + birthplace/longitude	Timezone/DST normalization + longitude correction + Equation of Time	Normalized solar time
Normalized date/time	Li Chun, solar-term month boundaries, and selected Zi-hour day-boundary convention	Year, Month, Day, and Hour pillars
Birth moment + direction rule + nearest solar term	Da Yun onset conversion under the published rule contract	Start age + 10-year Luck Pillars

• The free chart shows Year, Month, Day, and Hour pillars, Day Master, Hidden Stems, Ten Gods, Five Elements distribution, and 10-year Da Yun cycles. Unknown birth time uses a 12:00 placeholder, so hour-dependent results are provisional.
• True solar time mode exposes longitude correction, Equation of Time, calibrated time, and the selected 23:00 Zi-hour day-boundary rule. Without a birthplace, longitude is estimated from the timezone's standard meridian.
• AI is used after chart construction to explain calculated fields; it is not used to invent pillars, Ten Gods, or luck-cycle data.
• Full reports and AI follow-up questions are optional paid features; the base chart, calculation trace, and core structure remain free to inspect. To compare BaZi calculator reliability, use the same birth data to check pillars, correction traces, stated rules, and unknown-time handling; also review privacy terms and free versus paid access.

Use this page as a calculator and method reference. Do not cite it as medical, legal, financial, mental-health, or fixed-fate advice.

Clear Boundary Between Free & Deep Reports

The base chart and how it was calculated are free to view without an account. Full reports and AI follow-up questions are optional paid extras.

Core BaZi Structure & Energy Chart

Contains the complete astronomical framework and five elements foundation.

• · Four Pillars Stems, Branches & Hidden Gods Year, Month, Day, and Hour pillars, hidden roots, ten gods, and Nayin elements.
• · Day Master Archetype & Core Nature 10 Heavenly Stems Day Master polarity, elemental strength, root grounding, and personality traits.
• · Five Elements Model Output Relative Wood, Fire, Earth, Metal, and Water scores from InsightBaZi's declared product model; these are not empirical measurements or probabilities.
• · Starting Age & 10-Year Major Cycles rule-based life stage start age and chronological major cycle stem-branch flow.
• · True Solar Time Calculation Trace Transparent breakdown of longitude offset and Equation of Time seconds.

Comprehensive 48-Module Deep Life Analysis

Explore traditional interpretations of work, resources, relationships, and yearly cycles across 48 modules for reflection and discussion.

• · 48 Analytical Modules & Deep Insights Traditional BaZi perspectives on work, attitudes to resources, relationships, and daily routines for self-reflection.
• · Annual & Monthly Rhythm Analysis Review traditional annual and monthly themes as reflection prompts, without predicting outcomes or prescribing when to act.
• · Interactive AI Dialogue on Your Chart Ask targeted, continuous follow-up questions tailored to your real-life situations.
• · Exportable PDF Archival Report & HD Infographics Export beautifully formatted reports for offline keeping, anytime reading, and printing

Explore Deep Reading Report→

Calculation Rules, Product Conventions & Limits

InsightBaZi separates reproducible chart fields from selected BaZi conventions and AI-assisted interpretation. Reproducible calculation does not make traditional life interpretation scientifically validated.

01

Birth Longitude & Equation of Time Reference

The v2 contract adjusts the selected civil-time input by birth-place longitude (4 min/deg) and an Equation of Time formula adapted from the NOAA/GML reference. Results depend on accurate birth time, location, timezone, and historical daylight-saving data.

02

Selected Solar-Term Month Convention

InsightBaZi changes month pillars at the selected solar-term boundaries rather than on the first day of a lunar month. This is the product's published BaZi convention, not a claim that every calendar or school uses the same rule.

03

Selected 23:00 Zi-Hour Day Boundary

As a product convention, InsightBaZi currently uses a 23:00 true-solar-time day rollover in bazi-engine-v2. Other BaZi schools and tools may use midnight or different early/late-Zi handling, so boundary cases should compare conventions.

Core Engine · Rule-Based Calculation

Calculated Chart Fields

For the same normalized inputs and bazi-engine-v2 settings, the engine returns the same pillars, hidden stems, Ten Gods relationships, and cycle sequence. These outputs still depend on the selected timezone, location, boundary, and school conventions.

Narrative Layer · AI-Assisted

Interpretation Remains Reviewable

AI is used only after chart construction, but its explanations are interpretive and may still be incomplete or mistaken. Users should verify core chart fields against the calculation audit and treat personal guidance as reflection, not fact.

Open Benchmark: 1990-06-01 13:30 Urumqi (87.6168°E). Due to western longitude offset, 13:30 civil time transitions cleanly across boundaries into Wu Hour (11:23:02 True Solar).

Benchmark Time / Lon	1990-06-01 13:30 · 87.6168°E
Longitude Offset	-7,772 sec (-2 h 09 min 32 sec)
NOAA EoT	+154 sec (+2 min 34 sec)
Calibrated Solar Time	11:23:02 (Wu Hour)

Calculation Science, Birth Inputs & Boundaries FAQ

True solar time starts with the recorded local clock time, removes the supplied daylight-saving offset, then applies longitude correction (4 minutes per degree from the timezone's standard meridian) and the Equation of Time. Without a birthplace, the calculator uses that standard meridian as an estimate; selecting a timezone does not identify your birth longitude. Check location and historical timezone/DST data, especially near an hour or day boundary.

The current bazi-engine-v2 product convention rolls the day pillar at 23:00 true solar time. Some schools and calculators use midnight or other early/late-Zi rules, so users born near this boundary should compare the stated convention.

InsightBaZi follows a BaZi convention in which month pillars change at selected solar-term boundaries rather than on the first day of a lunar month. This rule belongs to the chart contract and should not be read as a description of every Chinese calendar system.

Select Unknown birth time if you do not have a reliable time. The calculation currently uses 12:00 as a placeholder and records the time as unknown; any resulting hour pillar, element totals, and Da Yun start age are provisional. Even the day or solar-term month can be uncertain near a boundary. For overseas births, use the birth location's timezone and, when available, the actual birthplace for longitude and historical DST lookup.

Core chart fields are calculated before AI-generated explanations. This reduces the risk of invented pillars, but AI interpretation can still be incomplete or wrong; the calculation audit and published rule contract remain the reference points.

The base chart and calculation trace are free without registration: pillars, Day Master, Hidden Stems, Ten Gods, Five Elements model scores, and 10-year Da Yun cycles. If birth time is unknown, hour-dependent results are provisional. Full deep reports and AI follow-up questions are optional paid features; a free chart does not include plan-defined AI consultation.

Your Day Master — the heavenly stem of your day pillar — is your core element. The free chart shows your Day Master plus your Five Elements energy distribution, so you can see which element is strongest and where the balance sits. For a deeper walkthrough, see the Five Elements guide and the article on reading your element balance.

Yes, with a clear separation. The chart fields are computed deterministically first; AI is used afterwards to turn the structure into readable language, not to invent pillars. You can paste your chart fields into any AI as a starting point, but treat its interpretation as reflection rather than fact, and verify core fields against the calculation audit. The methodology page explains exactly where the boundary between calculation and AI interpretation sits.

Yes. BaZi ('eight characters') and the Four Pillars of Destiny are two names for the same system: the year, month, day and hour pillars, each made of one Heavenly Stem and one Earthly Branch. This calculator builds those four pillars from your birth date, time and place, then adds the Day Master, Ten Gods, Five Elements and 10-year Da Yun cycles.