What is Saju (사주)?

Saju is the Korean tradition of Chinese Four-Pillar astrology (BaZi). It encodes your birth year, month, day, and hour as eight Chinese characters of Heavenly Stems and Earthly Branches, used as a self-understanding framework.

Yes. The full Saju reading — Four Pillars, Ten Gods, Twelve Life Stages, Five Elements balance, and 100-year Daewoon flow — is completely free, with no signup or email required.

How accurate is the calculation?

We use the Meeus astronomical algorithm to compute the 24 solar terms to the minute, apply the Korean Late-Zi hour rule, and use the day-master-centered Ten God / Twelve Life Stage logic. This matches the precision of paid Saju calculators.

What's a Day Pillar archetype?

Your Day Pillar (the stem-branch pair of your birth day) is one of 60 personality archetypes — like a higher-resolution sun sign. Browse all 60 in the sixty-pillars section.

命

Your Saju — The Blueprint of Destiny

Insight from 1,800 years of East Asian philosophy, unfolded from your birth date and time

Authentic Myeongri algorithm · 24 solar-term auto-correction · 100% free

Why this reading is accurate

天

24 solar terms via astronomy

Solar-term timings (Ipchun, Gyeongchip, etc.) are computed via Meeus astronomical formulas to the minute. The year and month pillar boundaries are exact.

地

Late-Zi hour correction

The day-pillar shift rule for births after 23:00 (Ya-Ja-Si) is correctly applied. The hour pillar uses KST.

人

Day-pillar-centered interpretation

Classical Myeongri readings centered on the day stem, with Ten Gods, Twelve Life Stages, and primary hidden stems — not the shallow zodiac-only reading.

What does Saju reveal?

The Four Pillars

Four pillars — Year, Month, Day, Hour — each made of one Heavenly Stem and one Earthly Branch, forming the 8-character chart of your life.

Ten Gods

Ten relational archetypes centered on your day stem — the lenses for self, wealth, status, recognition, and learning in your life.

Twelve Life Stages

Twelve stages from Birth to Tomb that show the strength and life-rhythm of your day stem — the spine of timing analysis.

Five Elements

Balance of Wood, Fire, Earth, Metal, Water — the elemental signature that shapes personality, vitality, and career.