Free Bazi (Four Pillars) Calculator
Enter your birth date, hour, and gender to automatically chart your Four Pillars, ten-year luck cycles, and other destiny elements. Computed locally in your browser โ data never leaves your device.
Key Features
Accurate Four Pillars
Year and month pillars are charted precisely by solar terms, and the hour pillar by true solar time.
Luck Cycles
Automatically calculates the starting age and each ten-year luck cycle and annual luck.
Five Elements & Ten Gods
Annotates five elements, ten-god relationships, hidden-stem gods, and day-master strength.
Destiny Elements
Also charts fetal origin, destiny palace, body palace, nayin, and void.
How to Use
Pick a date
Choose the solar (Gregorian) birth year, month, and day.
Pick hour and gender
Choose the birth hour and gender (gender determines the direction of the luck cycle).
View the chart
View the Four Pillars, luck cycles, and destiny elements.
Frequently Asked Questions
How is the Bazi charted?
The year pillar is divided by the start of spring, the month pillar by solar terms, the day pillar by the day stem-branch cycle, and the hour pillar by birth hour. The tool has built-in lunar and solar-term algorithms for accurate charting.
Why is gender required?
The direction of the luck cycle depends on gender and the yin/yang of the year pillar. Male yang-year and female yin-year run forward; male yin-year and female yang-year run backward. Gender directly affects the timing and direction of the luck cycle.
What are luck cycles and annual luck?
A luck cycle is a ten-year stage of life, while annual luck is the specific stem-branch of each year. Together they are interpreted against the day master.
Is my data uploaded?
No. All chart calculations happen locally in your browser; your birth information is never uploaded to any server.