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The heavenly stem of your Day Pillar—the reference point used for relationship labels in this chart.Four Pillars · Free, no account · Public method
Free BaZi calculator
with published rules.
Enter one moment. Receive a culturally faithful Chinese birth chart—also called BaZi or Si Zhu—in clear English, calculated on our server and never framed as a fixed verdict.
No accountNo birth-data storageMethod v1 published
Chart input / 01
Locate your four pillars
Calculated chart / 02
Your pattern,
held lightly.
Three-pillar chart. Birth time was left blank, so the hour pillar is intentionally omitted.
Visible balance
How we count ↗Five Elements
A count of visible stems and branches only. It is not a favorable-element diagnosis or strength score.
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Why did I get this?
Calculation note
Why calculators differ03Method before mystique
A calculation you can question
Clear rules.
Visible limits.
BaZi has schools of interpretation. We do not pretend those differences disappear inside software. Pillar Atlas publishes the exact boundary choices used by this version and validates them against fixed regression examples.
Why results can differ ↗YearLi ChunStart of Spring
MonthJieSolar-term boundary
Day00:00Late Zi stays same day
TimeCivilNo true-solar correction in v1
Learn the chart language
Keep the original terms.
Lose the fog.
01 / 日主
Day Master
The Day Pillar's heavenly stem, translated as a reference point—not a personality box.
Read guide ↗02 / 五行Five Elements
Wood, Fire, Earth, Metal, and Water as relational phases, with our simple count clearly labeled.
Read guide ↗03 / 十神Ten Gods
Traditional relationship labels retained beside plain-English names and methodological context.
Read method ↗Before you calculate
Questions worth asking.
What does this BaZi calculator show?+
Your Year, Month, Day, and—if known—Hour Pillars; the Day Master; hidden stems; Ten Gods labels; and a basic Five Elements count of the visible eight characters.
Do you store my birth details?+
No. Birth date, time, timezone, chart, and interpretation are processed in memory and never written to analytics storage. We keep anonymous funnel events and a one-way IP hash for rate limiting.
Why is true solar time not included?+
True-solar correction needs accurate longitude and a clearly chosen convention. Version 1 uses timezone-aware civil time rather than offering a location control that looks precise but may not be.
Can I calculate a chart without an exact birth time?+
Yes. Pillar Atlas returns the Year, Month, and Day Pillars and intentionally omits the Hour Pillar instead of guessing. Your Day Master still comes from the Day Pillar.
Why do BaZi calculators sometimes disagree?+
Timezone conversion, daylight-saving history, true-solar-time correction, solar-term boundaries, and the day rollover around midnight can all change a result. Compare the published method before comparing interpretations.
Can a BaZi chart predict my future?+
We do not make that claim. Use the chart as a cultural and reflective framework. Keep high-stakes medical, financial, legal, and relationship decisions grounded in appropriate evidence and expertise.