Hi, I think in metric units, so almost everything is some form of a power of 10, like a kilogram is a 1000 grams, etc.
Sometimes I will think of an hour and half as 150 minutes before remembering that it is 90 minutes.
Does something similar happen to imperial units users? Because as far as I understand you don’t have obvious patterns that would cause you to make these mistakes, right?
We have a lot of standard sizes that seem to be based on imperial - 12mm (1/2inch), 16mm (5/8inch), 19mm (3/4inch), 32mm (5/4inch) etc.
If you’re actually interested in taking a look, here’s a link to the dressed timber section of Australia’s hardware capital - Bunnings.