About & terms

Using the service

Enter birth details to explore a chart and glossary without an account. Calculation happens in your browser without a separate database. Choosing to save stores one recent birth record in this browser; saving again replaces it. The interface is available in Korean and English.

Results depend on the date, calendar type, birth time and selected calculation convention. If the birth time is unknown, results are limited to what can be confirmed.

Birth time and calendar basis

Saju calculations use Korean Standard Time (KST, UTC+9). For a birth outside Korea, convert the solar date and time to KST before entering them, including any date change. The app does not automatically convert world time zones or birth locations.

The simplified Korean 30-minute convention subtracts 30 minutes from the entered time. Choose “As entered (KST)” to calculate without this adjustment. It differs from a calculation using the birth location’s longitude and date-specific solar time. See the time calculation guide for details.

Scope of calculations and detailed readings

Calendar information and chart characters follow the calculation conventions explained on the screen. Saju readings are cultural reference content based on traditional symbols. They do not establish facts about your personality or future, or guarantee a particular outcome.

Detailed explanations cover seven areas: Personality, Business, Money, Relationships, Career & teamwork, Learning & growth, and Everyday rhythm. The base library contains 10,140 Korean patterns and 10,140 English patterns built around the 60 day pillars. These are combined with explanations based on the actual chart’s stem-based Ten Gods, element composition, and combinations or clashes. Pattern counts describe the static text library, not the number of all possible natal charts.

The 2026 Tojeong code and calculation details follow the displayed convention. Our original 2026 Saju commentary is distinct from the Tojeong code calculation. It is not a complete reproduction or translation of the 144 traditional texts. Monthly reflection questions do not predict monthly good or bad fortune.

Element counts alone do not establish Day Master strength or outcomes in money or relationships. Readings do not provide professional financial, business or medical advice.

Inputs and saved records

Enter birth details you are entitled to use. Check the person’s wishes before saving someone else’s information.

A saved record is not linked to an account. If you clear browser site data or change devices, the service cannot recover the previous record. Delete the saved record after using a shared device.

See the privacy policy for details on information processing.

Using the content

Results and glossary descriptions may be used for personal reference. Contact the operator before copying or redistributing the site’s design or original explanations in bulk. Materials with separate attribution follow the terms of their respective sources.

Changes and enquiries

Results and screens may be updated to fix calculation errors or improve explanations. Hosting maintenance or browser conditions may temporarily affect some functions.

Report errors or ask about the service through the Bloombrain website. Changes to these terms and their effective date will be published on this page.