Originally Posted by ///Machine
I think mdosu is partially correct. Most countries have already converted to metric, but the US hasn't converted yet.
The US, however, has committed to convert in a loosely open time frame. That's why in the US all containers/packages have to have the metric measurement in addition to the local imperial measures - check and you will find. The same happens to the speedometer in all cars in the US.
I assume all cars in the US have both, but I have been driving only BMWs since 2007, so can't confirm, but I am sure many forum members can.
Converted countries don't need anything other than metric. I wonder what does it look like in the UK.
Royale with cheese anyone?
there's also a difference between certain Imperial units and US units of measure, mostly volume related.