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Re:Ask HN: Why it is hard for US to move to metric system? by tgflynn on Thursday January 12, 2023 @10:27AM (#34354897)
It's political. A significant portion of Americans, mostly conservatives, are unable to accept that anything not invented in the US could be superior to what they are accustomed to.

There was a push toward adopting the metric system under Carter but since then the right wingers have been largely in control of the political discourse.

Re:Ask HN: Why it is hard for US to move to metric system? by jjgreen on Thursday January 12, 2023 @10:42AM (#34355160)
Er, they are aware that the inch, foot etc were not invented in the US right?
Re:Ask HN: Why it is hard for US to move to metric system? by robertakarobin on Thursday January 12, 2023 @11:02AM (#34355526)
You might be surprised at how many Americans think that Jesus spoke English.

Source: am American.

Re:Ask HN: Why it is hard for US to move to metric system? by seanw444 on Thursday January 12, 2023 @11:12AM (#34355715)
If Jesus exists, he probably can speak English. I'm sure that's not one of his limitations.
Re:Ask HN: Why it is hard for US to move to metric system? by yardie on Thursday January 12, 2023 @11:06AM (#34355587)
The US mile is different from the UK mile and US gallons are sufficiently different from UK gallons. Yes, our measurement system is almost entirely homegrown at this point.
Re:Ask HN: Why it is hard for US to move to metric system? by joshuaissac on Thursday January 12, 2023 @11:22AM (#34355906)
The UK had multiple incompatible measures with the same name. The 'imperial' measures were the result of a standardisation of these measures.

The US gallon is the same as the now-defunct English 'wine gallon'. The US mile was similarly the same as the UK statute mile, until it was indirectly redefined in terms of the metric metre in 1893. So at least the two examples given are not homegrown.

Re:Ask HN: Why it is hard for US to move to metric system? by vel0city on Thursday January 12, 2023 @11:53AM (#34356573)
I wish the pub down the street served UK pints :(
Re:Ask HN: Why it is hard for US to move to metric system? by ahartmetz on Thursday January 12, 2023 @10:56AM (#34355425)
"It's always been that way" is similar to "it was invented here" in that regard. Besides, the imperial units had local versions and some still do. There are AFAIK no US inches and yards, but US gallons and US pints.
Re:Ask HN: Why it is hard for US to move to metric system? by zethus on Thursday January 12, 2023 @10:57AM (#34355441)
Trusting us Americans to know history? Not a chance.
Re:Ask HN: Why it is hard for US to move to metric system? by mrguyorama on Thursday January 12, 2023 @12:17PM (#34357039)
Many americans seem unaware of many things that happened before 1776. How many americans even know that the constitution wasn't made until many years later, how many even know the articles of confederation exist, or the politics of 1600s colonies? Many americans seem to think the declaration of independence is legally binding.

We are an incredibly stupid country, because many of us actively devalue education, or otherwise denigrate people who learn. The requirements for teaching and education varies wildly state to state, including many states that basically have NO requirements for teachers, and we have actual, real, paper textbooks purchased by southern school systems that teach slavery as "not that bad"

Re:Ask HN: Why it is hard for US to move to metric system? by emmp on Thursday January 12, 2023 @10:55AM (#34355397)
I think it is a tough sell that there would actually be real value out of changing a bunch of road signage and recipe books to metric, and being a stickler about telling people to weigh themselves in kgs instead of lbs for their weight loss programs, etc. It's basically purely aesthetics. I don't think it is politically conservative to say that there's no actual productivity or social gain from expending time and energy 'moving' to these things in everyday contexts.

In scenarios where metric is actually needed or appropriate nobody has any trouble using metric. Every kid has learned it in school for decades.

Re:Ask HN: Why it is hard for US to move to metric system? by exmadscientist on Thursday January 12, 2023 @11:05AM (#34355574)
> In scenarios where metric is actually needed or appropriate nobody has any trouble using metric

This is the key point. What people asking this question often miss is that the US is actually a dual system country. Metric is quite common anywhere it is valuable to use! So the places it isn't used are mostly the places it isn't so useful, or at least where the transition cost is very high.

Re:Ask HN: Why it is hard for US to move to metric system? by Steuard on Thursday January 12, 2023 @11:06AM (#34355591)
We lost the Mars Climate Orbiter in 1999 because Lockheed Martin supplied a part that output results in pound-seconds and then that number was fed in to a NASA part that interpreted it as Newton-seconds.[1] Having US engineers speak a different language than all of the other engineers in the world imposes real, non-negligible costs for data checking and risks of failure for any project that might interact with non-US-centered expectations.

[1] https://en.wikipedia.org/wiki/Mars_Climate_Orbiter#Cause_of_...

Re:Ask HN: Why it is hard for US to move to metric system? by emmp on Thursday January 12, 2023 @11:20AM (#34355859)
I see that as an organizational issue within that company and its project management rather than a political issue. US engineers certainly all know how to use and speak metric. I actually promise you that you won't be able find one who doesn't.
Re:Ask HN: Why it is hard for US to move to metric system? by trgn on Thursday January 12, 2023 @10:58AM (#34355447)
How's the metric system superior? For science, sure.

But I find day2day use of measurements in inch/ft, e.g. in home renovation and architecture, way way easier than metric system.

I think it's the other way around. The adoption of the metric system was an ideological program from a very specific time. An enlightenment belief in a supreme rational order of things, military science transferred into the real world.

Metric system is cool, but it's not "better". Personally, I think it's worse and awkward for many use cases.

Re:Ask HN: Why it is hard for US to move to metric system? by buzzdenver on Thursday January 12, 2023 @11:15AM (#34355766)
Why is inch/ft easier than cm/m? As long as we use base 10, it seems trivial that units that are based on it are easier to deal with. Don't you hate it when unit prices for the same type of product, say coffee, are sometimes printed in dollar per pound, other times in cents per oz? Multiplying by 16 in your head isn't exactly trivial. Then with cooking there is teaspoon, tablespoon, ounce, cup, quart, gallon... The fact that there are 12 inches in a foot, but 16 oz in a pound is just madness.
Re:Ask HN: Why it is hard for US to move to metric system? by Zanfa on Thursday January 12, 2023 @11:17AM (#34355810)
> But I find day2day use of measurements in inch/ft, e.g. in home renovation and architecture, way way easier than metric system.

I’m gonna make an educated guess that you grew up using imperial units. There’s nothing more “natural” to imperial units. An inch is as arbitrary as a centimeter and a foot as arbitrary as a meter. You can eyeball them all equally accurately, but the imperials are gonna kick your ass when you’re converting.

Re:Ask HN: Why it is hard for US to move to metric system? by sowbug on Thursday January 12, 2023 @11:14AM (#34355751)
It's better because of network effects. More than 90 percent of the world uses it. They benefit from a consistent lexicon when communicating about measurements.

Nobody will ever convince anyone else that a centimeter is better or worse than an inch. Or a pound vs. a kilogram. It's a ridiculous discussion to have.

When the primary benefit of a choice is consistency, the outliers will always be able to argue that their system works for themselves. Which, unfortunately, misses the point.

Re:Ask HN: Why it is hard for US to move to metric system? by trgn on Thursday January 12, 2023 @11:17AM (#34355808)
> the outliers will always be able to argue that their system

Isn't that exactly the point. Why must people to adapt to the system, rather than have the system adapt to the people?

Metric system is a technocratic system. It has technocratic benefits. I value that a lot less than people, who, oh what a coincidence!, are already on the metric system.

Re:Ask HN: Why it is hard for US to move to metric system? by drexlspivey on Thursday January 12, 2023 @11:05AM (#34355578)
How much does 12.34 gallons of water weight?
Re:Ask HN: Why it is hard for US to move to metric system? by trgn on Thursday January 12, 2023 @11:11AM (#34355702)
My point exactly. You constantly have to deal with those stupid fractions and decimals in metric system all the time.

Also - weight and volume relations have mostly scientific relevance. Not joe schmoe putting up out some drywall, or proportion door and window sizes.

It's not that you can't use metric system. It's just worse for a lot of day2day.

Re:Ask HN: Why it is hard for US to move to metric system? by toss1 on Thursday January 12, 2023 @11:34AM (#34356163)
NO, in metric, I've never dealt with fractions.

It is ALL DECIMAL, which is the point.

It is in the "English" system that you have to deal with the fractions: the board is 8 feet 1 and 23/32 inches long. Now how long will it be when you cut off 5 3/8 inches from that?

If you can't more quickly subtract 137mm from 2482mm, you are either extremely unusual or insincere.

Re:Ask HN: Why it is hard for US to move to metric system? by RajT88 on Thursday January 12, 2023 @11:09AM (#34355660)
Exactly. Another example:

How many feet is 74 inches? How many meters is 1234cm?

(How long did it take for you to do that math in each case?)

Re:Ask HN: Why it is hard for US to move to metric system? by trgn on Thursday January 12, 2023 @11:13AM (#34355740)
6ft 2inch.

So easy. So clean.

1234cm is the dumbest measurement ever. Once you find yourself working with those, you are either a scientist or you have adapted to the machine rather than have the machine adapt to you.

Re:Ask HN: Why it is hard for US to move to metric system? by RajT88 on Thursday January 12, 2023 @11:26AM (#34355975)
You didn't actually do the test.

It would still take you longer in your head to come up with 6ft 2inches (which is the wrong answer, btw, the right answer is 6.167 ft.), than it would to come up with 1.234 meters.

> Once you find yourself working with those, you are either a scientist or you have adapted to the machine rather than have the machine adapt to you.

This is a super weird comment for a programming-centric forum.

Re:Ask HN: Why it is hard for US to move to metric system? by toss1 on Thursday January 12, 2023 @11:29AM (#34356043)
Nonsense.

You have obviously never seriously used both systems. I use both everyday, and the Inch+ is still more familiar.

BUT metric is VASTLY superior and easier

Examples: Quickly subtract 5/8" of an inch from from 1' 5 25/32" or subtract 16mm from 452mm - which is easier?

Quickly add 3 tablespoons to 3/4 of a cup vs 44 ml added to 177 ml..

Hell, just measure something. That stock board is 8 feet 3/8 of an inch long and needs to be cut to 7'6" (or is it 78"). vs 2.448m cut to 1.98m, and even those would be more round numbers working with metric lumber & building.

Sorry, but the only reason you think it is awkward is that you don't use it regularly.

Re:Ask HN: Why it is hard for US to move to metric system? by qcic on Thursday January 12, 2023 @02:26PM (#34359022)
How is measuring something in 3 1/16" better than 8mm? Conversely, how is that not worse?

You can measure from 1nm to 1Em using a simple decimal scale, while with imperial you have to handle conversion from twip to inches to foot to yard to mile to league, all using different scales.

Re:Ask HN: Why it is hard for US to move to metric system? by alphazard on Thursday January 12, 2023 @10:58AM (#34355459)
It really doesn't seem political as you present it, along party lines. No one wants to incur the cost of switching, which would be increased errors and material waste. The politicans who change it will be associated with the one time increase in errors and confusion. The benefits are reaped slowly over time (in the form of fewer conversions), so no one can really claim all the credit at once.

It's also not political insofar as whether we use metric or imperial de facto depends on the decisions of many thousands of manufacturers and suppliers, not the government. Are they going to outlaw all the imperial measuring tapes, or institute a buy back program?

Re:Ask HN: Why it is hard for US to move to metric system? by RajT88 on Thursday January 12, 2023 @11:08AM (#34355633)
Right leaning folks tend to have nationalistic (or at least Anglo-centric) talking points when it comes to the switch. Just in the conversations I've had, people feel like they'd be losing some piece of American culture if we switched. It's a thing.
Re:Ask HN: Why it is hard for US to move to metric system? by toss1 on Thursday January 12, 2023 @11:23AM (#34355927)
You are evidently getting downvoted out of ignorance.

In 1975, congress passed the Metric conversion act, and created the US Metric Board for planning, coordination, and public education.

This was disbanded under Reagan, particularly due to White House Advisor Lyn Nofziger's efforts [0]. The killing came from the conservative side, straight up.

And yes I was in HS then, and was very enthusiastic about the conversion, and the opposition was generally driven by conservative xenophobic sentiments (and frankly, laziness to learn a new system). I literally heard people say they "didn't want no damn foreign system here", nevermind their ignorance that "standard" wasn't invented in the US either.

The fact is that the same xenophobia, laziness, and willful ignorance is being exploited today to drive RW voting blocks. Metric is now so far off their anti-scale as to be invisible, but if another push comes, I can guarantee that the RW media will be all over the same anti-foreign-stuff on metric.

What's worse, I use both systems nearly every day in my work, and metric is WAAAY easier.

Example: Quickly subtract 5/8" of an inch from from 1' 5 25/32" or subtract 16mm from 452mm - which is easier? Or add 3 tablespoons to 3/4 of a cup vs 44 ml added to 177 ml.. Hell, just the notation in the "standard" system is insane, nevermind the origins (3 barleycorns to the inch or the length of the current king's foot...).

Yes, I get that doing conversions is a pain, but once you get used to the switch (maybe just spend a couple weeks in any other country) it is way easier. Opposition is really either political or an unwillingness to think about it.

[0] https://en.wikipedia.org/wiki/Metrication_in_the_United_Stat...