That’s not possible, even if the US went fully metric tomorrow.
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I believe that many Americans are “living a 100% metric environment”, or at least those in professions were the metric system has become the accepted norm, like in science, the military etc.
There are also examples of where imperial units are used in the rest of the world. In aviation heights above ground are still in ft.
Crude Oil is priced in $$/Bbls. while bunker oil is priced per M.T. internationally.
Diesel and Gasoline are priced per ltr. at the pump but in M.T. in bulk in most of the world, incl. UK.
In the drilling industry it is a mix of metric and USCU, causing a lot of confusion.
I remember on a Maersk rig working in Australis where the official figures were in metric.
But the rig was working for a US operator and the Companyman insisted on having the drilling rate per hr. in USCU. They had a measuring stick that was marked in meters divided in inches, The Companyman reported progress to the office in meters and inches.
It is what it is. Everyone plays the hand they got dealt. There’s a Wikipedia article here:
Anyone that wishes to influence the situation is free to petition whomever they think might help their cause. For me personally it’s not that urgent an issue.
Here’s from the Wikipedia article above:
However, conversion was not mandatory and many industries chose not to convert, and U.S. customary units remain in common use in many industries as well as in governmental use (for example, speed limits are still posted in miles per hour). **Unlike other countries, there is no governmental or major social desire to implement further metrication
That’s the bottom line no "major social desire to implement further metrification. Posting explanations or arguments on this forum is not going to move the needle on social desire. It’s just a waste of time and energy.
Metric system is taught to students in school - so it’s not a matter of lack of understanding:
math standards calls for teaching U.S. customary and metric units side by side in grades 2, 3, 4, and, 5 under the category of “Measurement & Data.”
This is my point here; to look at that map in the OP someone might assume that metric units are not being taught in the U.S. But that’ s not correct.
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Mao once said; “To obtain true Communism will take 20 generations and each generation have to have their own revolution”
Having followed the discussion here I’ll paraphrase that: To obtain metrication will take at least 20 generation, where each generation have to have their own:
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I don’t know why this metric / traditional divide apparently bothers people outside the U.S. so much more than inside but the augment this article raises an interesting point; the U.S. is leaving the choice of standards to the free market rather than government decree.
Why Metric Snobs Are Wrong - Foundation for Economic Education
the GAO noted, “Worldwide usage of U.S. customary standards is still much greater than that of metric standards.” Although U.S. usage accounts for much of this, customary standards persist internationally in numerous forms, ranging from any use of latitude and longitude, to industry-specific units such as troy ounces and carats, to any production whose actual dimensions are tooled on customary units.
To clarify the last, the most successful photographic film format continues to be manufactured to its original specification of exactly 1-3/8 inches in width. The customary standard of this American invention has been eclipsed by its subsequent relabeling as “35mm,” an approximate metric equivalent. This kind of soft conversion succeeds in giving the appearance of metric prominence, of greater precision, and of foreign industrial clout, but it doesn’t alter the hard reality that about two-thirds of global industrial output remains based on customary specifications.
That article is from 20 years ago but would explain the map shows England as “mixed” evidently they are back-sliding, letting free markets work.
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Metric snobs 
I wonder who on this forum fits that description. At least our elite overlords are local and not in an entirely different country like Belgium.
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“Metric fundamentalists” is a good term: That three-color map reflects the desire to oversimplify the world, to map the world as we wish rather than the way it is.
The aesthetic appeal of a standardized and orderly system like metric is driven by a tendency to seek order and symmetry rather than practical considerations.
To the metric fundamentalist the messiness and chaos in the real world results in demands that the government impose order. What the fundamentalist miss is the hidden order that results in leaving system to optimize using market forces.
Is this some form of advanced irony?
If I assume good faith it’s difficult to understand why this topic keeps coming up here. Part of the reason must be just non-U.S. members not knowing the situation here in the States.
Metric has been part of the school curriculum here since the 50s or 60s so there’s really no need to post “explainers” or charts etc., that’s not likely to convince many.
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One aspect of the metric/imperial divide that alternately amuses or annoys me is when a manufacturer/seller does an arbitrary conversion — example: small electrical connectors labeled”2.54mm spacing” — when “.1 inch” is what those parts were born as.
Lawmakers do it, too - they say “1,852 km” instead of “1000 miles”
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Maybe time to make it the official system of measurement then? That would save a lot of confusion, costs and accidents caused by having a different system in USA from the rest of the developed world.
No need to convince MANY, only those in the US. (4.25% of the world’s population)
There is another problem; why do we need different Voltage, Hz and standards for electric plugs in different countries?:
When I was travelling widely I carried multiple adapters to fit the plugs wherever I was.
PS> Luckily I don’t have that problem any more, since I don’t travel much these days.
Now there are Universal Travel Adapters available:
But it still don’t solve the Volt & Hz problem.
One that amuses me is the ratchets for metric sockets have drives measured in English units. And tires have rim size in inches, and width in mm.
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The U.S. is a big country, my view doesn’t have much weight in the matter, yours even less.
I don’t have an opinion as to which approach to change is better, government decree or free market forces. Both arguments seem to have merit.
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