As a builder in Britain I have become quite happy using both Imperial and Metric.
We have both on our tape measures so I use whichever side is convienant or 'fits' the best.
I generally calulate areas and volumes in Metric but not always.
If I'm dealing with an older chap I tend to talk in feet and inches, a young guy and it'll be metres and millimeters. (Only seamstresses use centimeters
)
It can be a pain trying to match new Metric materials to existing Imperial stuff, especially brickwork and plumbing.
I'd walk 100meters but if it's a mile then I'll drive
