Birth details
Birth date and local time are enough to calculate a chart. If you select a birthplace, its historical time zone and longitude are used for true solar time correction.
Birth Chart
Enter your birth date and time to generate a Bazi chart online. Add a birthplace when known to apply historical time-zone and true solar time correction.
How This Page Works
Free chart output
The free chart shows the Four Pillars, Day Master, Five Elements, Ten Gods, hidden stems, and the chart balance used by later readings.
Timing layers
A saved birth profile can continue into luck pillars, annual and daily timing, life-cycle charts, and focused reports without re-entering the chart.
We calculate the Four Pillars from the entered local time. When you select a birthplace, its historical time zone and longitude are also used for true solar time correction.
If your birth time is uncertain, start with the closest known time and treat hour-pillar changes as a point to review.
Readings are cultural and reflective references. They are not legal, financial, or medical advice.
Frequently Asked Questions
What is a Bazi birth chart?
Bazi turns your birth year, month, day, and hour into four stem-branch pillars. The chart is then read through the Day Master, Five Elements, Ten Gods, hidden stems, and timing cycles.
Is the Bazi calculator on CosmicTao free?
Yes. You can generate the chart for free, then look at the Day Master, Five Elements, Ten Gods, hidden stems, and chart balance before deciding whether to continue.
What if I do not know my exact birth time?
Use the closest known time first. If the birth time is near a boundary between two hours, note that the hour pillar may need a second check later.
Why does true solar time matter?
If you know the birthplace, longitude affects local solar time. True solar time helps confirm whether the hour pillar may change, especially near hour boundaries.
What do the Day Master, Five Elements, and Ten Gods show?
The Day Master is the stem of your day pillar. The Five Elements show the overall balance in the chart. The Ten Gods describe how the other stems and branches relate to the Day Master.
Can I use Bazi for compatibility?
Yes. Bazi compatibility usually looks at Six Harmonies, Three Harmonies, Six Clashes, and Three Penalties, along with whether two charts complement each other.
What do the paid reports add?
The paid reports place luck pillars, annual cycles, and monthly timing into the chart so you can read the same structure at a deeper stage level.
Read these first
New to Bazi? Start with Day Master, Five Elements, Ten Gods, and Yong Shen before moving into timing cycles.