BaZi calculator — your Four Pillars chart
Enter your birthday to see all four pillars of your chart — year, month, day and hour — with the Ten Gods and your five-element balance. Korean saju and Chinese BaZi read the same eight characters.
No time? Leave it empty — we never guess the hour pillar.
How the four pillars are calculated
Year pillar — changes at Ipchun, the Start of Spring (around February 4), not on January 1. Month pillar — changes at each of the twelve solar terms (around the 4th–8th of each month). Day pillar — a 60-day cycle that has run unbroken for thousands of years; its stem is your Day Master. Hour pillar — one of twelve two-hour blocks.
This calculator uses your local standard clock time (daylight saving removed). The free full reading goes further: it converts your time to true solar time at your birthplace, which can move the hour — or even the day — for births near a boundary.
Questions
Is Korean saju the same as BaZi?
Yes — both read the same Four Pillars: year, month, day and hour, each written as a heavenly stem and an earthly branch. Saju (사주, “four pillars”) is the Korean name; BaZi (八字, “eight characters”) is the Chinese one. The calculation is the same; Korean saju has its own interpretation traditions.
What if I don’t know my birth time?
Leave the time empty. Six of your eight characters come from the date alone, and your Day Master — the most personal part of the chart — does not depend on the hour. We never guess the hour pillar.
Why is my year animal different from what I expected?
Saju changes the year at Ipchun, the Start of Spring (around February 4), not on January 1 or Lunar New Year. If you were born in January or early February, your year pillar is the previous year’s.
How is the month pillar decided?
By the twelve solar terms, not the calendar month. The month pillar changes around the 4th–8th of each month, at the exact moment of the solar term.