Online Lupin Ruler Search

1. The Lu Ban ruler, also known as the "door ruler" or "angle ruler," is said to have been invented by Gongshu Ban (Lu Ban), a famous craftsman from the State of Lu during the Spring and Autumn Period. Its primary use is to measure the dimensions of buildings and furniture, similar to the T-square used by modern craftsmen.

2. In home renovation, the Lu Ban ruler is used to measure the dimensions of doors, windows, and furniture to select auspicious numbers and avoid inauspicious ones, thereby improving the feng shui of the living environment.

3. This Lu Ban ruler is a 42.9-centimeter version; please take note of this before use.

4. Note: The conversion results provided by this tool are for reference only; please use a physical ruler as the standard in actual use.