Nobody likes counting.
Especially if you have to make a lot of scale calculations.
In the drawing above of a Kentish Oasthouse I’m developing now, I know only one size.
The height of the cellar is 2700mm. From this measurement I have to calculate every other length.
To make life a bit easier, I made a conversion-to-scale tool.
You can calculate any length from “Real” to 1:87 (3,5mm scale) or to 1:76,2 (4mm scale).
And backwards. When you like it, download it for free.