> If you specified fuel economy in terms of km/litre in the UK you 
> would get a blank stare from most of the motoring population, MPG is 
> by far the most commonly used units over here.  Very few people 
> would have an idea about what is a good or bad number in those units 
> (including me, until I converted it!).


10 l/ 100 km =~~ 28.6 mpg.
File that away in rear memory with 25.4 (exact), 2.2 , 1.6, 0.3048, 
3.28, 100000, 9.8. 32, 3.14159265358979, .4770, .3010, 0.5555 (5/9), 
+/-32, 273.16, 22.4, 1.3, ...

You can also convert mpg to per acre, or the inverse of any area unit. 
Or fuel economy to area.



        RM

mm/"
lbm/kg
km/mile
m/ft
ft/m
m/s/s
f/s/s
-
-
-
k/F
offset in F
K
l/gm
kg/m^3
...


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