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BaZi Calculator

Use this free online BaZi calculator to find your Four Pillars chart, Day Master, Five Elements and ten-year luck cycles.

Calendar

Birth details

With a birth city, adjust for longitude and the equation of time.

Advanced settings

Birth details are processed locally in your browser.

  • No sign-up required
  • 4 languages
  • Runs in your browser

A WORKED EXAMPLE

What a BaZi chart looks like

BaZi represents your birth year, month, day and hour as four pairs of Heavenly Stems and Earthly Branches. Start with Gēng (庚), the Day Master in the highlighted day pillar, then compare the Five Elements and ten-year cycles below.

15 May 1990, 14:30 in Taipei · male · standard time · 23:00 day boundary

Read our calculation method
Year
庚午
Gēng Wǔ · Metal Horse
Month
辛巳
Xīn Sì · Metal Snake
Day
庚辰
Gēng Chén · Metal Dragon
Hour
癸未
Guǐ Wèi · Water Goat
Day Master · Gēng, Yang MetalVisible elements · Metal 3, Fire 2, Earth 2, Water 1, Wood 0First ten-year cycle · Rén Wǔ, forward

What you can explore with the BaZi calculator

Four Pillars & Ten Gods

See the stems and branches for your year, month, day and hour, along with the hidden stems, Ten Gods and Na Yin.

Five Elements

Compare the elements in the visible stems and branches with a weighted count that includes hidden stems.

10-Year Luck Cycles & Annual Pillar

Find the date your first Da Yun cycle starts, see how the cycles progress, and look up the current year’s pillar.

True Solar Time & Daylight Saving

See how the historical time zone, daylight saving, longitude, and equation of time affect your chart.

BaZi Compatibility

Compare two birth charts and see how their Day Master elements relate in the traditional Five Elements cycle.

Day Boundary Settings

Choose a 23:00 or midnight day boundary and see which rule your chart used.

How it works

  1. Enter your birth details

    Choose a Gregorian or lunar date and enter your local birth time. If you don’t know the time, you can still draw a three-pillar chart.

  2. Check the time settings

    Choose your birth city to apply its historical time zone. You can toggle true solar time or change the day boundary in advanced settings.

  3. Read your chart

    Start with the Day Master in the day pillar, then look at the Five Elements and luck cycles. The calculation details appear beneath your results.

Go to the calculator Read the calculation method

Five ways to read a BaZi chart

In traditional BaZi, the Four Pillars are read together. Start with these five questions as you work through your chart.

  1. Day Master, Yin and Yang, and the Five Elements

    Start with the Heavenly Stem of the day pillar. Its element and Yin or Yang quality give you a reference point for reading the other stems and branches.

  2. Four Pillars and stages of life

    Each pillar connects the year, month, day or hour of birth to a different symbolic area of life. Read across the four to see how the tradition relates family background, daily life and later years.

  3. Season, warmth and elemental balance

    Use the birth month to place the elements in their season. Traditional readings also weigh warmth, cold and the support each element receives from the rest of the chart.

  4. Ten Gods and social roles

    The Ten Gods name relationships between the Day Master and the other stems. They offer a vocabulary for discussing themes such as learning, expression, responsibilities and working with others.

  5. 10-year luck cycles and annual influences

    Da Yun groups the timeline into ten-year periods. Compare each cycle and annual pillar with the birth chart to see which symbolic themes come into focus.

Featured BaZi guides

Learn to read a chart, look up the ten Day Masters, or see how the calculator handles time and calendar boundaries.

View all BaZi guides

FAQ

How birth time, place and calendar conventions shape your chart.

How accurate is a BaZi calculator?

The calculator follows published calendar rules. Results depend on your birth details and the settings you choose. Near a solar term or a day boundary, a few minutes can change a pillar. BaZi interpretations are cultural and symbolic.

How do I read my BaZi chart?

Start with the Day Master, the upper character in the day column. Then look at the other stems and branches, the hidden stems and the Five Elements distribution.

What is my Day Master?

Your Day Master is the Heavenly Stem of your day pillar. It identifies one of the Five Elements and its yin or yang quality.

How are the Four Pillars calculated?

Each pillar pairs a Heavenly Stem with an Earthly Branch. Lìchūn sets the year boundary, twelve solar terms set the month boundaries, and the selected day boundary sets the day pillar.

Can I calculate BaZi without a birth time?

Yes. Select the unknown-time option to see the pillars that can be determined from the date. A boundary on that date can make some pillars uncertain.

What is true solar time in BaZi?

True solar time estimates the position of the Sun at your birthplace. The calculator uses longitude and the equation of time to adjust local standard time.

How is BaZi different from Western astrology?

BaZi uses a Chinese calendar of stems, branches and solar terms to build four pillars. Western astrology typically uses the positions of the Sun, Moon and planets across zodiac signs and houses.

How does the calculator handle an overseas birth?

Choose the birth city and enter the time shown on the original record. The calculator uses that city’s historical time zone, accounts for daylight saving, and shows the corrections with the result.

More questions? Read the full FAQ

Ready to calculate your Four Pillars?

Use a Gregorian or lunar birth date, adjust for local solar time, or compare two charts. All calculations run in your browser.

Calculate for free

Based on traditional BaZi and calendar calculations, for cultural exploration and self-reflection.