USA isn't some sort of "metric-system hold-out". We sell soda in liters and wrenches in millimeters, among other things. And in the UK, cars are still rated in

USA isn't some sort of "metric-system hold-out". We sell soda in liters and wrenches in millimeters, among other things. And in the UK, cars are still rated in miles per gallon, as well as using Stones for human weight.