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Lo Ban Ruler

Check door, cabinet, and furniture sizes against the traditional feng shui ruler

Size lookup

Enter any actual measurement — the ruler automatically reduces it to a 450mm cycle.

8 Sections of the Lo Ban Ruler (450mm cycle)

Tai (Wealth)

0–53mm · Auspicious

Benh (Sickness)

54–107mm · Inauspicious

Li

108–161mm · Inauspicious

Nghia (Righteousness)

162–215mm · Auspicious

Quan (Officials)

216–269mm · Auspicious

Kiep (Robbery)

270–323mm · Inauspicious

Hai (Harm)

324–377mm · Inauspicious

Ban (Origin)

378–431mm · Auspicious

What is the Lo Ban Ruler?

The Lo Ban Ruler (魯班尺) is a feng shui measuring tool used by East Asian carpenters and feng shui masters. Each 450mm cycle is divided into 8 sections: Tai, Benh, Ly, Nghia, Quan, Kiep, Hai, Ban. Dimensions falling in Tai, Nghia, Quan, Ban are auspicious; Benh, Ly, Kiep, Hai are inauspicious. Commonly applied to doors, cabinets, and altars.