Học quán Sơn Chu
Classical East Asian metaphysics, computed properly
A research and teaching house for Eastern classical studies. Every calculator here follows the classical rules — solar terms, hour conventions, star placement — and every one of them is free and needs no account.
The tools
- BaZi — Four Pillars of Destiny — eight characters, hidden stems, Five Element strength, Ten Gods, luck pillars.
- Zi Wei Dou Shu — the twelve palaces with major and minor stars, decade and annual cycles.
- I Ching — Plum Blossom and Six Lines methods, plus the full 64-hexagram reference.
- Chinese almanac — day quality, solar terms, the 28 lunar mansions, auspicious hours.
- Feng shui for a home — Eight Mansions and Flying Star charts from a compass bearing.
- Qi Men Dun Jia and Da Liu Ren — two of the Three Rites.
- Qi Zheng Si Yu — Chinese astrology using real planetary positions.
- Name and number analysis — Five Grids and Three Talents.
- Wedding date selection · Year to build a house · Feng shui ruler.
What makes these calculators different
Most free tools online cut corners in the same three places, and each one silently changes the result:
- Solar terms, not lunar months. In BaZi the month pillar turns at a solar term. Charts built on the lunar month are simply wrong for anyone born near a boundary.
- The Zi hour convention is applied explicitly. From 23:00 the date rolls forward; 00:00–01:00 keeps the current date. This is stated openly rather than left ambiguous.
- Astronomical data where the system needs it. Qi Zheng Si Yu uses real planetary longitudes and the ascendant is computed from your birthplace coordinates, not approximated.
The calculation is deterministic and follows the classical rules. The interpretation is offered as a cultural reference — not advice on health, money or legal matters.
Start here
Frequently asked questions
Is everything really free?
Yes. Every calculator on this site is free and works without an account. A free account is only needed if you want to save charts, compare several of them, or use the AI assistant.
Which system should I start with?
BaZi is usually the gentler entry point: four pillars, five elements, no star catalogue to memorise. Zi Wei Dou Shu gives a richer map of life areas but takes longer to read.
Do you offer readings in English?
The calculators are being translated first. For a personal consultation, please contact us — we will tell you honestly whether we can serve you in English at that time.
Are the articles available in English?
Not yet. The research library holds several thousand Vietnamese articles and we deliberately do not machine-translate them; a bad translation of a classical text is worse than none.