@freemo , the USA has a weird hybrid system, where officially everything has to be done metric, but then translated to imperial for public consumption.
>"the USA has a weird hybrid system, where officially everything has to be done metric, but then translated to imperial for public consumption."
What "offical" requires that? DOT does stuff in miles, NOAA does stuff in Fahrenheit...
@Pat NASA. Auto makers use metric. Pharmacies use metric. Science is all metric.
@Pat , your car speedo is made with parts that use the metric system. 10mm nuts, not 3/8ths. Your brakes are held on by a 17mm bolt. The legislation that defines how the car has to perform in a crash is written in metric tons of force.