Auto CAD Engineering and Architectural scale table

Below are two standard scale tables for Engineering and Architectural drawings.

To obtain the scale factor of an Engineering drawing scale:

1. Multiply the feet of the desired scale by 12.
2. For example, 1″=50′ scale would be 50×12 = Scale Factor 600.

To obtain the scale factor of an Architectural drawing scale:

1. Multiply the denominator of the desired scale by 12.
2. for example, 1/4 scale would be 4×12 = Scale Factor 48.