For the GP, Canada converted to metric starting in 1970 and completing the conversion in 1985.
So everyone under 55 grew up in metric, but anyone older than that had to convert.
So, baking and cooking are generally done in imperial to this day, but commerce and public works are all metric.
I generally think personal weight in pounds, height in feet, distance in meters, deli purchases in grams, fluids in litres, gravel in yards, chopped wood in cords, etc.