It seems like a weird point to bring up. How often do y’all convert your measurements? It’s not even a daily thing. If I’m measuring something, I either do it in inches, or feet, rarely yards. I’ve never once had to convert feet into miles, and I can’t imagine I’m unique in this. When I have needed to, it’s usually converting down (I.e. 1/3 of a foot), which imperial does handle better in more cases.
Like. I don’t care if we switch, I do mostly use metric personally, it just seems like a weird point to be the most common pro-metric argument when it’s also the one I’m least convinced by due to how metric is based off of base 10 numbering, which has so many problems with it.
Edit: After reading/responding a lot in the comments, it does seem like there’s a fundamental difference in how distance is viewed in metric/imperial countries. I can’t quite put my finger on how, but it seems the difference is bigger than 1 mile = 1.6km
It’s not my measurements I need to convert, it’s other people’s. Don’t forget, American content is pretty overrepresented on the internet, so I actually need to do conversions pretty regularly.
Beyond the day to day, a spacecraft has burned up in the Martian atmosphere and an aircraft has run out of fuel mid-flight because of unit conversions not being done. These happenings aren’t very common, but the repercussions can be pretty big when they do, and the fact that this is a completely self-inflicted problem just makes it worse. Also, the shipping industry spends a good amount of money on unit conversions.
As for the problems with base-10, certainly a system based on base-12 would in principle be better (mind you, imperial isn’t one either). The problem is our numerals are base-10 and so our intuitions around numbers are based on that. 12 can still be dealt with, but once you get to 144 or 1728, it gets a lot harder. I can certainly name more integer divisors of 100 and 1000 off the top of my head despite having fewer of them.
That wasn’t because of unit conversions, that was a major failure of systems management.
I say this as someone in IT where we have multiple no involved people verifying work we do. Mistakes happen, so you have external validations. I’m not even permitted to touch the systems for which I’m responsible - I have to document changes, with extensive lab testing that is vettwd by someone who’s never seen these systems.
NASA should be shamed for dropping the ball so badly.
Ams those are the only two cases you can come up with, compared to the trillions it would take to convert, and the billions of errors that would occur with trying to convert now.
Just look at a single machine shop, that’s using large from 1945 (because that’s all they need for accuracy). Should they upgrade their lathes to new ones with metric indicators? How much steel isn’t going to take, coal, aluminum, energy just to transport the lathe to that one shop.
Then all their tools. The world doesn’t have the manufacturing capability just to make measurement tools for all the industries that would need it.
And then you’d still have the conversion problem between one business and the next during the decade’s long transition. How many conversion mistakes do you think would happen then?
You people who scream about this all the time have never had to even look at what it would take. You act like it’s a simple problem.
Testing and validation are very important, but they’re no replacement for structurally making mistakes as impossible as possible to make in the first place. In fact, that was the conclusion from the Gimli Glider incident, that using mixed units increases the likelihood of mistakes being made, and so they stopped doing that. It’s kind of absurd to acknowledge that people make mistakes and therefore their work needs to be validated, but when the people doing the validation also make mistakes, they get all of the blame even when the people who made the thing did things in a way that increased their chances of making mistakes when they could have chosen not to.
Also, that’s some contrived scenario you’re painting.You make it sound as though every machine shop in the US would have to replace all of their equipment. First of all, for anything computer-controlled the units are arbitrary and software-defined. But even for purely (electro-)mechanical machines, it’s not like those can’t be (and aren’t already) modded up the wazoo. Why replace the entire machine when you can just swap out some of the gears or even just the dial? If a machine has been around since 1945, they’ll have done things like that many times already.
Of course no transition is going to be instant or painless, but it’s better than keeping up this situation forever. I mentioned two incidents because they’re the most dramatic, but things like that happen every day and the cost of lesser incidents also builds up. Somehow, almost all of the rest of the world managed to go against centuries if not millennia of tradition and momentum and transition in a fairly short amount of time during a period when precision engineering was already a thing that happened at a large scale, but the US is special? Give me a break.
Oh, absolutely. And all of those are better arguments than “It’s easy to go from meters to km! Just shift a few decimals!” despite the latter being the more common argument I see.
And yeah, imperial isn’t base 12 either. I do think base 12 numbers would be better, and I would have exactly 0 reservations about metric if we did, though it’s not like I’m exactly anti-metric now. I use it probably about as much as I use imperial day-to-day
Well, I do think that has value too. This example is going to be fairly specific to my situation, but as a programmer working on simulation software, it’s not uncommon for me to see or need to enter values in terms of meters that I think of as being in the realm of kilometers. Being able to reason more intuitively about these distances just by moving the decimal point around instead of having to multiply/divide them by 5280 or something is helpful. And the reason I have this intuition to begin with is because I use the same units in everyday life. This does require the system of units to be based on multiples of 10, however.