LOL

This is pretty elementary CAD

Listen, if you have 1/8" = 1'

Then take the 8, times it by 12 (as there is 12 inches in a foot), this equals 96

96 is your scale factor

Likewise 1/4"= 1' ( 4 X 12) 48 is your scale factor

Now, what I was referring to earlier was 1" = 10' (Architectural Units)

Not 1:20 which is engineering units

So, once again, if you take 12 as 1 inch is representing a foot, then you simply times 12X10 and 120 is your scale factor

Of course it can get complicated if you want.

Pop Quiz:

Can anyone tell me what the scale factor would be for 4" = 5680'