Yeah I just came back from Lowe's after cutting a bunch of 2x6s into feet, inches, and 1/4 of an inch... wish I could've just said cm

I've used Celsius for decades in America, I just look up the weather every day in Celsius and figured it out pretty quickly (although I have to use F for all my kitchen appliances for cooking at least my climate control systems in car/home all work with C)