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The super-slow conversion of the U.S. to metric (2025)

thefabricator.com

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Re: The super-slow conversion of the U.S. to metric (2025)

#71
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The metric systems's worse flaw was doubling down on base 10 instead of the plainly superior base 12.

Isn't base 10 easier because you just add/remove zeros, and also we have 10 fingers to count..?

No, converting units is not a useful exercise. airplanes are measured in mm - even the full length is in mm not decameters or even hecameters (i had to look those prefixes up, spellcheck doesn't even know the word, but I think they are correct)

Re: The super-slow conversion of the U.S. to metric (2025)

#72
post #67
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Earlier quoted context omitted.

I've heared Americans, unironically, state that the metric system is less precise than the imperial system. I have no clue what the origin is of this myth, but at this point I wouldn't be surprised if Trump held this belief too.

Depends on the field - it happens that 1\1000 inch is a good tolerance for many machining operations, while metric doesn't have a convient round number close enough to that range to be useful. That doesn't slow down mathinists though, they know the fraction of mm tolerance they need to use and it is what is marked on their tools.

So do I understand correctly that it's from a tooling issue? If so, thanks for that insight.

Re: The super-slow conversion of the U.S. to metric (2025)

#73
post #24
post #18

Earlier quoted context omitted.

UK doesn't use cups in recipes and fuel is dispensed in litres. Road signs are still in miles.

It has been a long time since fuel was sold here in the UK in gallons, but most cars still are spoken of in terms of MPG (miles driven per gallon of fuel). There are steps to move this to L per 100km - but most people here still use MPG. We also use Pints in pubs, which are a different size to US pints.

> We also use Pints in pubs

And so we should.

A British pint is 568 ml. We will switch to smaller metric 500 ml 'half-litre' beers over my dead body.

All other imperial measurements can bugger off to the history books where they rightly belong.

Re: The super-slow conversion of the U.S. to metric (2025)

#74
post #51
post #24

Earlier quoted context omitted.

It has been a long time since fuel was sold here in the UK in gallons, but most cars still are spoken of in terms of MPG (miles driven per gallon of fuel). There are steps to move this to L per 100km - but most people here still use MPG. We also use Pints in pubs, which are a different size to US pints.

Engines have been in litres since forever it feels.

Everywhere. All the car companies in the us switched to metric in the 1980s. You find some inch stuff once ina while - but only when the part hasn't been changed in the last 40 years.

Re: The super-slow conversion of the U.S. to metric (2025)

#75

The US being stuck in imperial is such a meme nowadays with "freedum units" and the like. It's yet another odd thing that makes it easy for the rest of the world to laugh at the US. In these isolationist times I doubt this will change soon though, but it'd definitely help international collaboration.

Most likely the current administration will pass executive orders banning the use of metric system, and then force other countries to switch to imperial or face heavy tariffs.

Re: The super-slow conversion of the U.S. to metric (2025)

#76

I'd part with cups and teaspoons/tablespoons and the like, but you'll pry inches/feet/yards and fahrenheit from my cold, dead hands. They're both more convenient for daily use. I think I'd prefer to keep miles as well but I don't have a good reason for that one. Fahrenheit has more precision without using decimals for the thing 99% of people are using temperature measurements for: air temp. Where I live, we generally…

What's the problem with decimals? They're all numbers. -4.5 degrees C is fine, isn't it? (The actual temperature right here right now). Where's the problem?

Re: The super-slow conversion of the U.S. to metric (2025)

#77
"Back when I was a Catholic-school kid in northern Wisconsin, my school lessons briefly focused on the metric system. This was in the late 1970s."

Man, the progressive school (Comanche Elementary in Overland Park, Kansas!) must have had a huge impact on my life. In addition to open classrooms (I was in Unit 5, not 4th Grade), team teaching, a focus on experimental science, a circular layout to the school with a sunken (architecturally) library in the center…

Yeah, we went over the Metric System that whole year. I can still sing the "Metric Family" song from the film on metric units ("Kilo", "Milli", etc.). And to my young and impressionable mind, the U.S. was joining the rest of the "Free World" in a kind of Star-Trek-like casting aside of the old things that divided us—joining each other with a focus on progress, science, space…

President Carter came along around the same time or shortly after. And I have a photo of a family road trip to South Dakota, Montana: the sign that indicates the altitude of a particular mountain pass has both feet and meters. I Google-mapped the same location recently and of course it's no longer in meters.

I feel like in my elementary school days (the 1970's) the U.S. was on the cusp of a future of optimism—no doubt buoyed by having put astronauts on the Moon, but I was wildly on board for it.

But then some kind of shit seemingly started to poison the country. I don't feel we have ever returned to that level of national optimism. Perhaps 1976, the Bicentennial, was the end of it. (Recently watching the film "Nashville" brought me back a bit of the vibe of the times.)

I've been missing it my entire life since.

Re: The super-slow conversion of the U.S. to metric (2025)

#78

The problem is that Fahrenheit is a bit more convenient for describing the weather. Inches and feet are a bit more convenient for measuring human scale things and for being easily divisible by more numbers. And we’re used to the rest of it. Unless someone comes along and forces it on you, for the average person, there’s not enough incentive to switch.

As someone born and living in a country that uses the metric system, I do not understand a bit of what inches and feets mean. Tell me something has 10-15 cm, and I know what it means. I measure 173cm, I know what one meter is about. 5'10? What the hell is that?! 5 feet and 10 inches? Some people have small feet, some have larger. And what is an "inch"? :) Oh, and fahrenheit, what the hell it means? 0ºC means ice, 100…

That’s not what I’m saying at all. I’m saying that a system where the majority of air temperatures in the vast majority of the country fall between 0 and 100 is slightly more convenient than one in which they fall between -17 and 37. 0 is really cold it doesn’t frequently get colder than that in most of the country. 100 is really hot, in most places it doesn’t get hotter than that.

Feet are slightly more convent for declining human sized things because meters are just a little too big to describe human height and centimeters are a bit you

If you were designing a system to describe humans with no other consideration you’d probably pick one where 10 units was the average human height. And feet is closer to that than meters. Also you can divide 12 by 6 and 3.

I’m not saying that customary is superior just that it does has certain advantages.

Re: The super-slow conversion of the U.S. to metric (2025)

#79

I'd part with cups and teaspoons/tablespoons and the like, but you'll pry inches/feet/yards and fahrenheit from my cold, dead hands. They're both more convenient for daily use. I think I'd prefer to keep miles as well but I don't have a good reason for that one. Fahrenheit has more precision without using decimals for the thing 99% of people are using temperature measurements for: air temp. Where I live, we generally…

That’s funny because when I work with Fahrenheit I just work with 5°F ranges to compensate for the approximate mental math required. Eg very quick mentally, 100°F = 37.778 °C (thanks autocorrect) = (100-32)/2 = 34.

But if it was closer to freezing say 42°F =5.556 °C (again) so 5°C. So arbitrarily we could say 57°F was 12°C =53.6 °F actually.

But a true Canuck knows knowing the temp is barely half the battle, what’s the wind speed and humidity? 29°C can be a lovely day if it’s dry or completely unbearable if it’s humid.

We hardly ever use decimals for weather-related measurements, the other factors above being more relevant.

Contrast that with measurements where I would say if you need to know a precise one you should be using decimal; ie what do you do if it doesn’t precisely third or fourth? If you’re talking about tool sizes then any system works as long as your froodle matches the grommlet.

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