Start with the Day Master
The Day Master is the reference point of the chart. It tells you which element anchors the rest of the interpretation and how support or pressure is evaluated.
BaZi Calculator · No sign-in required
Free BaZi Calculator for Four Pillars Charts
Use this free BaZi calculator to turn birth date, time, and place into a Four Pillars chart. Review Day Master, Five Elements balance, true solar time, and luck-cycle structure before deeper interpretation.
- ✓ Apply true solar time
- ✓ Saved history after sign-in
- ✓ Grounded interpretation
Birth Data
Accurate birth date, time, and place improve chart precision and timezone handling.
Calculate firstSee the free result immediately
True solar timeLocation corrects the hour pillar
Auditable methodPublished terms and weighting
No absolute predictionsUse as structural guidance
How It Works
Move from birth data to a readable BaZi result
The first pass stays practical: calculate the chart, inspect the main signals, then use timing and guides when you need depth.
- 1
Enter birth data
Start with date, hour, place, and gender context so timezone handling and the hour pillar stay clear.
- 2
Generate Four Pillars
The tool builds the chart structure immediately. Sign in only when you want to save it to your account history.
- 3
Read core signals
Use the Day Master and Five Elements view before you jump into interpretation.
- 4
Explore the layers
Continue into luck timing, Huangli, guides, wiki terms, and follow-up questions.
How To Read A BaZi Chart
Focus on four signals first
If you are new to BaZi, treat the chart output as a framework. Start with the Day Master, check the Five Elements balance, then review major combinations and timing trends.
Check Five Elements balance
Look for overrepresented or weak elements. The balance does not mean every element must be equal, but it helps you understand where the chart is concentrated.
Review Ten Gods and pillar context
Ten Gods become useful when viewed through the chart structure. Read them together with stems, branches, and combinations instead of treating them as isolated labels.
Use luck cycles as context
Luck cycles and annual timing are trend indicators. They help frame periods of support or friction, but they are not guarantees about career, love, or wealth.
Why Free BaZi
More than a chart — a transparent reading workspace
Every signal you'd want from a Four Pillars tool, with the algorithm assumptions out in the open.
Daily insight
Daily fortune, scored on five axes
Sign in to see today's overall, career, wealth, relationship and health scores (0–100), with a five-tier rating and highlighted opportunities and risks.
Open today viewTiming depth
Five layers of luck timing in one view
Decade luck, annual, monthly, daily and hourly trends — all built in. Read the curve, drill into any window, and find the periods worth acting on.
Open luck timelineAlgorithm transparency
Published methods, not a black box
True solar time correction, the weighted Five Elements formula and the shensha table are all described below — not hidden behind a vague "proprietary engine".
See the methodsLearn loop
Chart, Huangli, wiki, follow-up — one workspace
Generate a chart, cross-reference the Huangli, learn vocabulary in the wiki, and ask follow-up questions in chat. AI follow-up is currently free.
Open HuangliHow we calculate
Methods you can audit
Free BaZi is built on auditable libraries, published thresholds and disclosed limitations.
Algorithmic foundation
Solar terms, stems & branches and Najia derive from lunar-javascript. True solar time uses geographic longitude vs. the standard meridian (~4 minutes per degree). Hidden stems and 30+ shensha (Tianyi Guiren, Jiangxing, Wenchang, Taohua, Yima, …) follow published Ziping-pai tables.
- lunar-javascript for calendar arithmetic
- Longitude-based true solar time correction
- Ziping-pai 30+ shensha annotations
- Weighted Five Elements: stems 2, branches 1, primary hidden stems 1.5, residuals 0.75
Reading structure
Every reading uses a fixed set of sections, so you read structure first and interpretation second. Thresholds and weighting choices are stated explicitly rather than hidden inside confident-sounding paragraphs.
- Nine fixed reading modules: overview, personality, career & wealth, relationships, learning, body rhythm, timing, action
- Day Master strength uses a 55 / 40 threshold — published, not hidden
- Five Elements weighting (stems 2 / branches 1 / hidden stems 1.5 / residuals 0.75) is stated in the algorithm section above
What's free, what's paid
Clear pricing, no surprise upsells
We keep the boundary explicit so you know what is available immediately, what needs an account, and what is paid.
Free access
- Four Pillars, Day Master and Five Elements preview without sign-in
- Saved history and seven-module basic reading after sign-in
- Daily fortune scoring on five axes
- Five-layer luck timeline (decade → hourly)
- Huangli almanac, wiki and blog
- Personal share-card export
Free for now
betaMay become metered in the future.
- AI follow-up questions on your reading
Optional, one-time
Extended Reading $3.9Human Interpretation $49- PDF download (with Extended Reading)
Quick Glossary
Core terms you will see on the result screen
Four Pillars
The year, month, day, and hour pillars that make up the chart and carry heavenly stems plus earthly branches.
Day Master
The heavenly stem of the day pillar. It acts as the core reference for judging support, control, output, wealth, and authority relationships.
Five Elements
Wood, Fire, Earth, Metal, and Water. Their distribution helps reveal the chart's dominant tendencies and weaker areas.
Luck Cycles
Longer-term timing periods that provide context for how the chart interacts with changing external conditions over time.
Continue Learning
Explore the key pages behind the calculator
Use these pages to move from quick chart generation into explanation, glossary learning, and related timing tools.
→
Huangli calendar
Check daily and hourly activity guidance alongside your broader Four Pillars study.
→BaZi blog
Read practical explainers and long-tail tutorials built around common beginner questions.
→BaZi wiki
Browse structured glossary entries for chart terminology, pillars, and interpretation basics.
→BaZi calculator with analysis
Need structured chart analysis after the free calculator? Open the dedicated analysis page for Day Master, Five Elements, and luck timing.
→Day Master entry
Understand the central reference point of a BaZi chart before you interpret the rest.
→Five Elements entry
Learn how Wood, Fire, Earth, Metal, and Water shape chart balance and tendencies.
→10-year luck cycles
Understand how Luck Pillars (Da Yun) organize decade-level timing without treating trends as guarantees.
→Beginner guide
See how to read your first BaZi result screen step by step after using the calculator.
→How to read a BaZi chart
Follow a structured reading order across the Four Pillars, Day Master, Five Elements, and timing layers.
→BaZi Year Encyclopedia
A fixed editorial method covering 201 stem-branch years, Tai Sui relations, annual flying stars, year hexagrams and monthly solar terms.
→Guanyin Oracle
Choose a topic, then use the verse as a prompt for reflection. Static interpretation is public; AI follow-up requires login.
→BaZi Case Library
Four deceased public figures in each of six categories, with birth sources, chart snapshots and clear research limits.
FAQ
Common questions about this BaZi calculator
1. What is a free BaZi calculator?
A free BaZi calculator converts birth date, time, and place into a Four Pillars chart. Free BaZi is built for fast chart generation first, so you can inspect structure before any deeper interpretation.
2. Does the free BaZi calculator include chart analysis?
The homepage calculator focuses on generating a clear Four Pillars chart with Day Master and Five Elements structure. Sign in to save the chart and open the free basic reading. For a dedicated analysis-oriented landing page, use BaZi calculator with analysis.
3. What is the Day Master in BaZi?
The Day Master is the heavenly stem of the day pillar. It is the core reference point used to judge support, output, wealth, authority, and relationship patterns in the rest of the chart.
4. Why is birth time important?
Birth time affects the hour pillar and can change the structure of the chart. It also improves timing-related reading, so a more accurate hour usually produces a more useful result.
5. How should I read Five Elements balance?
Use Five Elements balance to spot concentration and weakness, not as a simplistic scorecard. The key is understanding which elements support or challenge the chart structure around the Day Master.
6. Does the calculator include 10-year luck cycles?
Yes. After signing in, the BaZi 10-year Luck Pillars (Da Yun), annual, monthly, daily, and hourly timing panels are included. Each layer has a score curve and detail panel so you can inspect a selected window.
7. Is the AI follow-up free?
AI follow-up questions on your reading are free for now. Usage may become metered in the future, so we describe it as a current courtesy rather than a long-term guarantee.
8. What does the basic report include, and what is paid?
The Four Pillars chart, Day Master, and Five Elements preview are available without sign-in. After signing in, the free basic reading adds saved history, luck timeline panels, and a concise interpretation. Extended Reading and Human Interpretation are optional one-time purchases.
9. Is this a learning tool or a chart reading tool?
It is both a calculator and a guided reading tool, but it is written with a grounded tone. The goal is to help you understand chart structure and tendencies rather than make exaggerated guarantees.
Free BaZi
Generate your free BaZi chart first, then decide how deep to read.
Start on the calculator homepage for chart structure. When you want a more analysis-led path, continue to the BaZi calculator with analysis page, wiki, and reading guides.