BaZi Calculator - Four Pillars

Enter a birth date and time to see the eight characters of a Saju chart, with the Five Elements, Ten Gods and major luck cycles.
Everything is calculated on your device.


■ What you can see

- Year, month, day and hour pillars, in Chinese characters with Korean readings.
- Ten Gods, hidden stems and the twelve life stages.
- Five Elements balance, yin and yang, zodiac animal, lunar birthday.
- A Day Master reading, element balance, ten major luck cycles and this year.
- Save or share a chart as an image card.
- Save charts for family and friends by name.


■ How it is calculated

Saju apps often disagree because they use different rules. This app shows its rules on screen.

- Year and month change at the exact minute each solar term begins.
- Solar term times come from astronomical calculation, checked against the Korea Astronomy and Space Science Institute.
- The lunar calendar comes from the Korea Astronomy and Space Science Institute, from 1900 to 2050.
- Clock time is adjusted to local mean solar time by birthplace. You can turn this off.
- Korea's historical time zones (UTC+8:30 in 1908-1911 and 1954-1961) and daylight saving are applied.
- You choose whether 23:00 belongs to the same day or the next.
- If the birth time is unknown, the hour pillar is left empty rather than guessed.


■ What this app does not do

- No in-app purchases.
- No sign-in, no sign-up.
- No popups pretending to be updates.


■ Privacy

Internet access is used only to fetch ads.
Names and birth details are stored only on this device and never sent anywhere.

Readings are for reference only, not a basis for medical, legal or financial decisions.