And of course in this country, we've been buying fuel in litres for years, but STILL measure fuel consumption in m.p.GALLON - !![]()
And of course in this country, we've been buying fuel in litres for years, but STILL measure fuel consumption in m.p.GALLON - !![]()
Or with some cars, gallons to the mile!
3 Stones is about 19kg.

Just looked the highway code for stopping distances.
Speed is in mph
Stopping distances in metres
Or in "car lengths"
Gallons/mile is actually an area. As explained by Randall Munroe (xkcd) here: https://what-if.xkcd.com/11/
So you could express fuel efficiency in acres. Here's a link to a handy conversion
https://www.wolframalpha.com/input?i=gallons+per+mile+vs+acres
So 50 miles per gal = 0.02 gal per mile ~= 1.4 x 10^-11 acres
That's 140 nano-acres I think
I always remember people multiplying the price per litre by 4 to get the approximate price per gallon... I wonder if people still do?
And of course now with EVs, they meaure charging in mph.