I am always confused anyway
I thought we went decimal years ago. We load up our tanks with litres of water then work out the weights in kilograms. Then we buy diesel in litres and try to work out our mpg and buy RO units in American Gallons per day and buy water fed poles by the footage.
It's a crazy system! I was taught SI units at school and that was bloody years ago and we're still using two systems seem to spend half my time trying to convert one to the other then back again.
I could rant about this all day!
I hope that clears it up!