‹PillarAtlas

Saju calculator

Explore a free saju chart with the four pillars of your birth date. Saju is the Korean tradition of Four Pillars, also known as BaZi.

For entertainment and self-reflection only. No medical, financial, or life-outcome guarantees.

Free Atlas

Start with your birth details. No account needed for your basic four-pillar chart.

Birth date
Birth time
Calendar
Sex (optional, for future traditional notes)

Birth details stay in this page and are cleared when you leave. No account or birth-data storage.

Uses entered local civil time; no timezone or true-solar-time correction. Day changes at midnight. Unknown time leaves the hour pillar open.

Your atlas begins here

Enter your birth details to reveal your year, month, day, and hour pillars.

What is saju?

Saju means “four pillars”: year, month, day, and hour. Each combines a heavenly stem and an earthly branch. The tradition uses these symbols as a framework for interpretation, not scientific prediction.

What is the Day Master?

The heavenly stem of your day pillar is the Day Master. In a saju reading or BaZi reading, it serves as a reference point for the other symbols. An unknown birth time leaves part of the chart incomplete.