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I agree that 10 as the base is suboptimal, however everyone using the same base has great network effects. That’s what the other 190-ish countries are annoyed about


The thing is, the US tried to adopt the Metric system but with number of failures: https://en.wikipedia.org/wiki/Metrication_in_the_United_Stat...

Smaller nations have no problem changing everything. The marginal benefit is too small for a giant to turn on a dime.

A lot of things in US are already both ANSI/Metric:

- Electronics and PCB manufacturing (accepts both, but its a bit messy). Headers are 0.1" but BGA pitch is 0.4mm for example.

- Hardware stores have both standard and metric sizes for fasteners

- Liquids (both oz/ml has to be printed by law)

- Car speed gauges (both mph/kph printed by law)

- Food items are all metric. A Coke can has 42 grams of sugar. There is no oz printed in nutrition labels.

It's kind of a hybrid system.

However, there are exceptions for the follow which are still stuck:

- Temperature, weather is always in Fahrenheit. Even in recipes.

- Paper sizes are not adopted to ISO standards.

- Pressure is almost always in psi


> Smaller nations have no problem changing everything. The marginal benefit is too small for a giant to turn on a dime.

Every other nation seemed to manage it. It's just the usual American exceptionalism. There's nothing special about the USA that makes it harder to implement. There's just just a stubborn belief that there is, which becomes a self-fulfilling prophesy. A bit like all the other policy issues which the rest of the world has solved but the US still argues about.


I really don’t think that’s the issue. Even in the US, people complain constantly about the units.

The stubbornness you speak of is actually more to do with not willing to accept the costs of the change. World’s largest economy can’t just change it all at once even though majority of the people support it.

No one in the US argues that the Metric system isn’t superior. It doesn’t take a genius to figure out that multiples of 10 in a base 10 system of numbers makes everything easy.

In fact, the superiority complex comes from non-US folks thinking “look at those dumb Americans and their stupid units”.

Certain people think “Americans just don’t get it”.

Are you content that US and majority of the countries drive on the same side? https://en.m.wikipedia.org/wiki/Left-_and_right-hand_traffic


Left vs right hand drive is a poor comparison. The choice is entirely arbitrary, and nobody can seriously say that one is "better".


I am talking about adoption and standardization, not whether one is better than the other. If right hand side was “better”, it would be pretty much impossible for US/EU to change the driving side. Can you imagine the costs? Even if it was better.


Yes, but my point is that it isn't an example of the US adopting a standard. It's the US just happening to have chosen the more popular of two arbitrary options.


And the longer you wait, the harder it gets. They did at least start on the road to metric so perhaps in a generation or two, we are there!


One interesting fact about US food labeling requirements is that manufacturers are legally required to use incorrect conversion ratios.

Per the law 21 CFR 101.9(b)(5)(viii) [0]:

> (viii) For nutrition labeling purposes, a teaspoon means 5 milliliters (mL), a tablespoon means 15 mL, a cup means 240 mL, 1 fl oz means 30 mL, and 1 oz in weight means 28 g.

In reality:

* 1 fl. oz. ≈ 29.57 mL [1] (the volume measurements all build off of one another so I won't bother converting more than one)

* 1 oz. ≈ 28.35 g

In other words, volume and mass measurements are legally required to be off by ~1.4% and ~1.3% respectively.

[0]: https://www.accessdata.fda.gov/scripts/cdrh/cfdocs/cfcfr/cfr...

[1]: https://en.wikipedia.org/wiki/Fluid_ounce


> Smaller nations have no problem changing everything. The marginal benefit is too small for a giant to turn on a dime.

I don't think it is the size of the US that is the problem, I think the real problem is the US political culture.

The most successful approach to metrication is (a) do it in a big-bang, all at once, not gradually (b) make it apply uniformly nation-wide (c) make it apply across as many industries/sectors as possible, with as few exceptions as possible (d) take a predominantly mandatory rather than voluntary approach to metrication. If the US had followed that formula, it would very likely have succeeded, but it never had the political will to go down that path. Instead it opted for a piecemeal, voluntary approach, which was never likely to be a great success

In a parliamentary system such as the UK, Canada, Australia, etc, cabinet decides on a policy, and then the government usually has the numbers in the legislature to enact whatever policy cabinet decides. By contrast, in the US, the executive (President and cabinet) and the legislature (Congress) are two arms-length branches of government, with far less coordination, and it becomes much harder to push policies through unless strong interests are backing them.

Hence, in the US, it is basically impossible to get any controversial policy implemented unless either it has corporate lobbying behind it, or else it is some kind of emotional issue which attracts the attention of activist groups. Corporate lobbyists don't support mandatory metrication (it will cost business money, at least in the short term); metrication doesn't induce the kinds of emotions that issues like abortion or racism do, so there is little activist energy pushing it.

Also, the US historically has a much more hostile attitude to technocratic bureaucracy than most other Western countries do. In other countries, the scientific/technological elite consensus is "this way is better", and the government endorses it, and so the general public falls into line behind the government. In the US, there has always been much more resistance among the general public to those kind of elite proposals. (That said, I think in more recent years the rest of the English-speaking world is becoming more like the US in this regard; I think the Internet has helped export that US culture of distrusting technocratic elites to the rest of the English-speaking world.)


So, China or India don't use the metric system?


> Smaller nations have no problem changing everything.

And some smaller nations (the UK, for example) have never changed "everything" and likely never will.


In about 4 months the UK is scheduled to leave the EU.

Probably some portion hope to revert completely when they do.

Probably some portion hope that they rejoin the EU with another vote; and in the process get dragged the rest of the way to the engineering age measurements in the process.


This isn't about Brexit or politics. For example, Japan hasn't fully converted to metric, either:

https://resources.realestate.co.jp/buy/guide-to-japanese-apa...

> The size of a Japanese-style room is measured by the number of tatami mats:

>> Four mat room = 6.12 square meters = 66 square feet

>> Six mat room = 9.18 square meters = 98.8 square feet

> Most Japanese-style rooms in modern apartments are four or six mats in size.


Well, for rooms with actual tatami mats, you are not really interested in the area, but rather how many mats will fit. Thus, a 24m^2 (12 mat) room with the wrong aspect ratio will not fit 12 mats. (I'm using the 1 mat = 2m^2 conversion for convenience and I actually use 2m^2 mats in my tatami room.) Practically, mat sizes can vary a bit and can be custom sized. [1]

Even though today only a minority of apartment rooms are actually used with tatami it is still customary to give all rooms in mat units and usually in m^2 too.

BTW that's similar to how non SI units are still used in other countries nowadays, e.g. (metric) pounds and half-pounds are still used in context of groceries in colloquial German.

[1] https://en.wikipedia.org/wiki/Tatami#size


The UK left the EU at the end of January 2020. The EU is currently treating us as having various member agreements in place until the end of December 2020 but we have already left at this point.


>Probably some portion hope to revert completely when they do.

That would make trade deals with the EU impossible.




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