Traditional symbols. Clear calculation.
Free Bazi calculator
Explore your Four Pillars, Day Master, and Five Elements. Calculate from your birth date, time, and timezone, with the method and its limits in view.
How the calculation works ↗No sign-in. No AI call. Birth details stay in this tab. Cultural learning and entertainment only.
A chart, with its assumptions visible
Start with the four pillars.
Enter your details to see the year, month, day, and hour stems and branches, your Day Master, and simple Five Elements counts.
Free calculation · No sign-in · No AI generation
01
Four calendar pillars
Year and month follow solar-term boundaries. Day and hour use the recorded local civil clock, under a stated midnight rollover convention.
02
Time uncertainty stays visible
Unknown birth time leaves the hour empty. DST gaps are rejected; repeated clock times require your choice. Boundary dates get an explicit warning.
03
Symbols for exploration
Wood, fire, earth, metal, and water are traditional categories. Visible counts are a simple chart description, not a health, wealth, or personality score.
Before you interpret
Bazi calculator FAQ
What does a Bazi calculator show?
Bazi, also called the Four Pillars, pairs a heavenly stem and earthly branch for the birth year, month, day, and hour. This calculator shows those calendar symbols, the Day Master, and unweighted counts of the visible Five Elements. It does not generate a prediction.
Can I calculate a chart without my birth time?
Yes. Select the unknown-time option. We omit the hour pillar instead of inventing one. If your local birth date crosses a month-opening solar term, the year/month pair can also be uncertain; the result shows the possible pairs.
Which timezone should I enter?
Choose the IANA timezone of your birthplace, such as America/New_York, and enter the local clock time recorded at birth. Do not convert it to your current timezone. The calculator resolves historical UTC offsets and DST using your browser. It rejects skipped clock times and asks which occurrence you mean for repeated times.
Does the year change at Chinese New Year?
This calculator changes the Bazi year at the exact computed Li Chun (Start of Spring) instant. Month pillars change at the 12 Jie solar-term instants. These boundaries differ from Gregorian month starts and lunar New Year.
Does it use true solar time?
No. This version uses recorded local civil clock time for the day and hour, with no longitude or equation-of-time correction and no automatic subtraction of DST. Other schools use standard, mean solar, or apparent solar time, so results near day/hour boundaries can differ. Read the method before comparing calculators.
Are my details stored or sent to an AI?
No. Calculation happens in this browser tab, in memory. We do not send birth details to a server, analytics provider, geocoder, or AI. Clear the form or reload to remove them from the app. Your device or browser may independently retain form history.
Is the calculator free?
Yes. There is no account or payment requirement. Paid interpretations and AI generation are currently unavailable; there is no active checkout.
Can Bazi predict my future?
Bazi is a traditional cultural and symbolic practice. The meanings attached to a chart are not established scientific facts, personality measurements, or guaranteed outcomes. Use it for entertainment or personal reflection, never for medical, financial, legal, or major life decisions.
Explore the calculation method and test examples, what a Bazi chart means, and which birth details to use.