Just ask the typical american to represent the volume of a liter with
their hands, they will fail miserably.
I know that a litre (liter) is a 4" cube, or 1/9th of a cubic foot.
But then I'm British and in my early 60s, so I was a schoolchild under Imperial, (with a considerable nod to metric, especially in science classes) and I've lived my life through an increasing adoption of metric units, a process which is not yet complete.... so miles are still around even if gallons are fading into history.
Change ain't that hard, I promise.
You simply go down to Home Depot and pick up a tin (can) of paint (1 or 2 litre, say) that's the right size for the WALL you have in mind. The fact that a slightly different amount of product is in there is just as likely to SAVE wastage to go hard in the bottom when you try to keep it for another day, as to increase it...
..... and if you are concerned about actual coverage, just read the notes on the side of the pack the way you always did. The recommendations can be in square yards, square meters, or square blooming cubits if that's the area measure that's currently most used around your neck of the woods. ;-)
I think US should just go ahead and take the process that's already started, broaden it and speed it up a bit. After all, America is a "can do" kinda country, isn't it?
Make a start on road signs. They need replacement all the time, and are already on a rolling program of maintenance. Simply ensure all the replacements and all the totaly new ones have distances in kilometres. They don't have to mention miles at all..... people will accommodate with no trouble whatsoever...
.... meaning, it isn't gonna change the
distance to the next town to yours and the time it takes to get there...... (or to Chicago, or anywhere else for that matter)... just the figures that are used to describe that distance!
Now, if you guys want to do yourself a BIG favour you should be adopting International paper sizes, and doing so with all possible speed. That REALLY is worth doing. I hold the day sacred that the system was approved for roll-out in UK. ;-)
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Regards,
Baz