Luban Ruler

mm (number)

Luban ruler 52.2cm:

Luban ruler 42.9cm:

Luban ruler 38.8cm:

Unit: mm

Luban ruler 52.2cm: "airflow" objects. Objects that connect two spaces like doors or windows

Luban ruler 42.9cm: solid construction. It also corresponds to the Yang Houses (Living): a staircase step or a concrete kitchen.

Luban ruler 38.8cm: furniture and "land-related" measurement. It also corresponds to the Yin Houses (Death): coffins, altars or grave sites.

Luban ruler?

Lǔ Bān was a master of the Feng Shui and the father of the Chinese ancient carpenters. He was the inventor of the saw, chisel and many other carpentry tools, including the Lu Ban ruler. He is also the author of the 鲁班经 Lǔ Bān Jīng ‘Divine Carpenter’s Classic’, the Chinese building manual dating from the early 明 Míng dynasty.


Every Luban Ruler has a specific length divided into sections of equal auspicious (good luck) and non auspicious (bad luck) portions. Each section is then divided into more specific sub-sections. After the last section the pattern repeats.


There are more than 20 different types of rulers or set of measurements depending on the proposal of the object to be measured. The most common rulers are:

- 52 cm: "airflow" objects. Objects that connect two spaces like doors or windows.
- 42.9 cm: solid construction. It also corresponds to the Yang Houses (Living): a staircase step or a concrete kitchen.
- 38.8 cm: furniture and "land-related" measurement. It also corresponds to the Yin Houses (Death): coffins, altars or grave sites.


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