many engineering fields already have... US cars have been made with 10mm bolts for awhile. 3/8ths have pretty much gone away. Space is exclusively metric... [not that there weren't issues in the past](https://www.wired.com/2010/11/1110mars-climate-observer-report/)


And a lot of engineering fields have gone metric even if they claim they haven't. Computer chips, for instance, are made on 4, 8, 12, or 18 inch wafers, or at least we say they are, even though they are actually 100, 200, etc mm. It's just a time saving to say the approximations, two syllables for fourinch, 7 syllables for wonhundredmilimeters.


Could just say one-hun-dred-mill like we do. Don't have to do the whole 8.2296 metres Edit: Sad no-one mentioned my 9yard reference :(


Or, alternatively “hundo mill” if you’re really lazy.


Hun ml


Now it just sounds like you’ve given me a pet name and are talking about milliliters.


500ml RTX 3090


You can call me whatever you want if you’re gonna buy me an RTX 3090


*glares at 1050ti sitting in my pc*


*cries at my GTX 960m that’s in my laptop*


I feel you Brother, i have a rx580


Is that one of those vape pens? Y'all mod those things too much.


why say many word, when few word do trick


As someone who works with Aussie tradies this is the professional and preferred terminology


I spent most of my teenage years playing videogames with Aussies and Canadians. It took me 6 years to lose the Canadian accent and drop most of the slang from my vocabulary. The only thing I still do is finish any question with “Eh?” I also call a lot of things “cunt” especially when frustrated.


Or even 10 cm


yeah but the awful thing is that mils are a separate unit defined as a thousandth of an inch


That's why thou is a superior unit to the mil. 40 mil = 1 mil makes no sense, 40 thou = 1 mil makes a lot of sense.


Some would say 82296000000 angstroms.


Found the guy who took a solid state devices class.




Ten-centi! One-deci, even!


"Well you have the honeys. Then you have the double honeys. And if you want a real big ol fab, you get the trippy honey wafers" Southern US guys when the US adopts the metric system


Exactly, wafers are made with 6nm process not like whatever the fuck imperial equivalent of a nanometer is. Nanofeet? Juliuspeen?


Femtofurlong. Interestingly, the Angstrom is equivalent to 1 femtogunterschain, since the furlong and Gunter's chain are a factor of 10 apart. The imperial system is metric after all!


I’ve worked in electronics for the past decade and can confirm that we have been converting to metric. Many pcb related measurements are still in mils (1/1000th inch) but mostly things are in mm. 10 years ago it was much less metric. What you see though is just the American measurements converted to metric which makes for really ugly numbers all over the place like 2.54mm instead of 100 mils. You’ll often get different measurements in different units too like a board house will say 5 mil trace and space and 0.4mm pitch 🙄. Kind of the worst of both worlds lol. I don’t care which one just choose! They both work. Anyway, that’s my rant.


PCBs really are the worst of both worlds, but you kinda get used to it. You realize that 0.4 and 2.54 are special numbers in the conversion, so you can kinda adapt. I know that 40 thou is one millimeter, so that's where the 4 comes from, and I know that 1 inch is 25.4 centimeters, so that is where 254 comes from. Where the decimal goes in those conversions, though, is literally not possible to know given our current understanding of science and math. the harder you look to be sure where it should go, the more fuzzy the accurate position becomes. Something to do with the Heisenberg Uncertainty Principle or something...


Yeah, one inch is 2.54cm, not 25.4 haha


It's literally impossible to say for certain...


Meanwhile in Canada they still make us learn engineering in US units and mixed units so we can deal with companies across the border. Friends, I beg you, please stop this madness.


Don't blame me bro....I thought it sounded like the most logical thing when I was a kid like 45 years ago, and they didn't just rip the bandage off and do it...I was just talking with some friends the other day about how we'd be totally used to it by now...I would have only needed to buy one set of tools for working on cars when I was 19, too...


Well if you're an engineer you'd know all three systems (metric, Imperial, USCS) are valid systems of measurement.






Nah, we will have evolved past the point of needing them, so they will be plentiful. It's like finding lighters after you quit smoking.


The Apollo Guidance Computer did all measurements and calculations in metric, then converted to US Customary for the benefit of the crew. Earning a doctorate in orbital mechanics from MIT was within the scope of possibility for the astronauts but landing in meters/sec was out of the question. I wonder how much heavier the AGC was to carry the circuitry to do that?


Depends. Some older projects still use US Customary units (at least in the USA). But really, with computers and spreadsheets, who give a fig which units are used.


Am working an aerosapace project rn. Am in US. Everything is inches.


Can give positive confirmation with you. Work is aerospace as well. US. And current stuff. Everything is in inches.




Most vehicles are metric these days. The only things I come across that aren't are either old, small or large machinery. (Like lawn mowers, chippers, big tractors)


There was also a rocket that blew up upon launching because someone coded some weight or something in imperial instead of metric.


We should have changed to metric forever ago. Even just having two systems causes so much confusion and so many errors. And the metric system is much easier math.


Yeah having 2 systems using both pounds and kilograms it would just cause a mass confusion


British people people sweating using stones as a measurement


British people are the reason the US still uses Imperial measurements British pirates specifically. When the standards of measurement were being set for the new country, the ship carrying metric measuring devices to the states from France was sunk by British pirates. So they stuck with the system they had been using. This is not a joke.


too bad that was the one and only chance the US had to make the switch


As an 80's kid I specifically remember them trying to make the switch multiple times. Only to fail. A lot of the road signs on the freeway in half of my city have both Miles and Kilometers on them.


I'd love to see a reference for this. I'm not saying you're wrong, just saying it's not what we were taught. From my understanding we didn't choose metric as when the constitution was created America decided to play it "safe" and use the long already exsisiting British Imperial System, rather than the metric, which France only created a few years prior. While France's metric system made sense, many people worried other countries wouldn't adopt it. Kind of ironic considering America is practically the only one that *still* hasn't used it after over 200 years.. [source](https://www.britannica.com/story/why-doesnt-the-us-use-the-metric-system)


Not a reference, but just another account of the story. https://www.npr.org/sections/thetwo-way/2017/12/28/574044232/how-pirates-of-the-caribbean-hijacked-americas-metric-system


I was curious, so I looked it up. Looks like this event did happen: [source](https://www.npr.org/sections/thetwo-way/2017/12/28/574044232/how-pirates-of-the-caribbean-hijacked-americas-metric-system). Of course it’s likely not the only reason, but as the article says, a missed opportunity. Interesting!


I guess they sunk the dictionaries too


Did the person who invented that system smoke weed while doing it because he was probably stoned


Am I the only one that thought this was a pun?


I see what you did there


It would be weigh too difficult


That's a lb-mass of confusion, which is 32.2 lb-force of confusion or 9.81 newtons of confusion (assuming an acceleration of 1g).


You gonna slug it out over this?


When I was in elementary school, almost one thousand years ago, we were told to learn the metric system because it was the future. Yeah, that was a fucking lie. Also, no jetpacks, no flying cars. Now I feel so robbed. Thanks, OP.


In my country, back then when we still had dinosaurs in wild, everyone believed that tonne will be replaced by Mg and litre by dm3 _soon_. And guess what, almost fifty years later and we still use these, even though it is just labeling and no math whatsoever.


I think it was back in the 1960s or something where congress actually considered to change our system to metric. Of course, tons of industries lobbied against it because they would have to convert all their machines into metric which would cost a lot of money. So it didn't happen


And then... In a twist of irony, most of that industry promptly converted to metric after killing off officially converting the country to metric. Today, in the US, the customary units are mostly used as labels on products. Even the customary units are defined using metric units. One US pound is legally defined as 0.45359237 kilograms. There is no other definition for pound, that is how pound is literally defined in the US. Same for literally all the other US customary units. EDIT: Fixed couple of blaring spelling/typing errors.


The European redbull can is 16fl oz so it is 0.473ml


After a lifetime of in the American aerospace industry, I can tell you that the American standard scale is most definitely NOT just used for labels. I can't guess who told you that silliness, but you probably don't work with many machinist or mechanical engineers. If you bring a sketch or drawing to our machine shop, and your measurements are in metric, some poor sap is gonna be doing a lot of 25.4 action before a project manager even looks at it. Right or wrong, the vast majority of machine shops in America work with inches, and the vast majority of the tooling used in said machine shops are also in inches, and hell, the vast majority of hardware sold in hardware stores is in inches.


It was the 1970s


>Even just having two systems causes so much confusion and so many errors. The problem is you can't just tell people to ''choose a new system'', and leaving it at that. It's prone to create dozens of problems. It is confusing having two systems but it would be chaos changing from one system to the other in a few years. Having two systems is part of the process to transition into the metric system slowly but steady. The whole point is that everyone knows the metric system before changing to it so there are less problems and economic chaos from it.


Canada switched over and was pissed when the US backed out. "It takes time" that was the 70's what are we waiting for the metaverse to become real so we can use virtual meters? You phase it in in a plan over a decade start with school kids. it takes about 30 years as equipment phases out for the transition to be effectively complete at that point Imperial hardware is specialty and the whole world rejoices and things are cheaper to manufacture as we don't have to make 48x96 sheet metal and 1m x 3m


I think the States not switching over is what created the Frankenstein monster of weights and measures in Canada. But we can't blame it entirely on the States. It's been a few decades now, and Canada doing dumb shit like measuring height in feet and distance in kilometres, or measuring the weather in Celsius but the oven in Fahrenheit, that shit is totally on us


How many teaspoons are in a gallon? Beats the fuck out of me. But I know right away that there are 1000 milliliters in a liter.


I mean it only really causes confusion for people that dont wanna think ,its not like they are so different , but cant argue about the math part tho


>it’s not like they are so different They’re pretty fucking different dude


Literally different bases of math.


It still causes massive problems in manufacturing. When subcontractors change and make assumptions about measurements or when people are relying on spreadsheets and databases of 'measurement' columns, the assumption internationally is that it's metric. This causes millions if not tens of millions of dollars in waste every year for engineering, to say nothing of medical and construction industries. America isn't just being quirky and 'extra' they are being inefficient and, frankly, this is one of the many reasons it'll be hard if not impossible to ever return large scale manufacturing jobs to the US. No one will ever want to buy the US shit because they won't trust it.


Everything my company buys that comes from overseas, shit even things in the US sometimes, come in metric. All equipment and tools, spare parts. All metric. Yet if I need to run down to the hardware store to fix something in an emergency (production line shutting down emergency), everything is Inch. It’s incredibly frustrating. Maintenance just ends up redrilling and tapping a hole for inch to make it work. Now the machine is a Frankenstein of both standards. Not to mention all hardware stores need to “double” their inventory to hold enough for both sizes, if they carry metric at all.




The Mars probe that crashed due to this is a perfect example.


There are many instances of multi million machines being damaged or broken because of mistakes while converting


One reason it didn’t happen is that in the 70s a set of official weights and measures were sent from France but they were stolen by pirates. Not a joke, this actually happened. The weights are made of platinum so they are very valuable.


It’s not even two systems though it’s three. I’m a surveyor and some of my jobs use international feet while others use US Survey feet. The difference is .000002’ but that adds up over long distances so when using GPS if you’re using the wrong units the points can be anywhere from 2-6’ off. When building a bridge that’s kind of a big deal.


We should keep gallons for gasoline And mph for cars. Everything else yeah metric all the way.


I only want to keep Fahrenheit


"this socket is barely too small, better grab a 13" VS "this socket is too small, better figure out what's the next size up from 15/64"


I absolutely hate thinking in fractions and it's completely stupid that there's a better system out and we don't use it


Someone probably already said this but America was headed straight for metric with the rest of the world. Until they elected Ronald Reagan. That man single-handedly caused so much bad stuff for the US that denying you the metric system probably doesn't even make the top ten


how am we supposed to know the difference between a millimeters/centimeters/meters/kilometers. At least imperial units have distinctive names easier for kids to understand


Like the time NASA buried a probe.


But but, I memorized all these conversions


Don't worry. I have seen people screw things up in metric. Some people just don't know how many places to move the decimal point. It's just sad.


A lot of people don't have a foundational handle on what a base number system is and as such, base ten conventions seem arbitrary to them (they don't realize there's an underlying logic because it was never made explicit to them, math was just presented as a series of steps and rote memorization). New math education (which routinely gets shit on here) actually tries to foster this understanding by teaching people grouping and showing that connection to how we count and write numbers. Regardless, it's a systemic failure that lots of people don't get numbers at all.


hey this is actually interesting, where can I read or find out more about it?


Bruh you were on easy mode and still messed it up.


It will literally take mere hours to learn metric, everything is 10, 100, 1000 and easily divisible. It's not like having 14.2 hogs heads to a 15th of a barrel.


Perception is a different issue. Most Americans can’t imagine what 10 mm is (even if they know what 1 cm is) or how grams of flour I need to buy to make 48 cookies, or filling up 30 L of gas today, is that a lot or not… That’s why we don’t change. We’re just comfortable with what we have, for better or worse. As a science teacher, it’s painful, cause most of my students don’t understand either system!


Almost everything you learn is a waste, what's a few more conversions on top of it?


Nah, there's a certain allure to dimensions like 39/64th of an inch.


or “banana for scale”


There’s always money in the banana stand.


Hidden wisdom.


It’s not hidden. It’s caged.


*in* the banana stand.


I have pop pop in the attic


3/100th of an inch Versus something like 3 micro meters


Sorry closest we can do is 2/64th or 4/128th


Both are 1/32nd


But that could also be expressed as 0.5/16th


which is valid if your tape measure is only marked every 1/16th


Every programmer would find fractional inch measurements a breeze. When I went from building software to building homes, I loved the fact that having memorized the powers of two came in so handy. Granted, you only use the first few in carpentry, but it’s still fun. One would never achieve an accuracy of 1/16384 of anything.


Challenge accepted.


Well I'm game foo, fuck it.




Honestly I'm gonna use it in my house but idc what other people use; I'm adjusted to both systems


you haven’t adjusted to my system


What system do you use then?


Up here we are metric. One day the girls were teasing me calling me old. Then I hear from the deli “how many grams in a pound?” I replied “I’m not THAT old”. I turned around to see a boomer Karen with the most sour expression and the deli girls wide eyed. The cringe was real.


Where’s up here? Because if you’re Canadian, I’d say we’re more like half-metric at best. We half-assed the switch and ended up with random metric vs non-metric. Driving speed? Km/h. Height? Feet and inches. Weight? Pounds. Outside temp? Celsius. Oven or pool temp? Fahrenheit. House temp? Either or really.


You forgot my favourite part. How far a distance is another city? Hours.


To me, that makes the most sense. It’s by far the most useful for planning your day. 100 km on part of the 401 =/= 100 km on another part of the 401.


Oh yeah totally, it's just funny when you think that distance is measured in a completely different unit than it technically is supposed to be.


I design and sell mining equipment for work and I have quite a few customers in Canada. It always makes me chuckle when I get an equipment sketch sent to me from one of our guys on-site at the mine. It's such a mismatch of units and sometimes the guys don't specify what the unit is. Ill get a little pen and paper sketch sent to me and there will be a measurement on it like '35'. 35 what; Cm, in, ft, m?? A lot of the time it's obvious by context, but not always.


I had to draw a small drone from sketches a group did. I assumed all the measurements were in mm, turns out it was cm. So it wasn't that small.


What the fuck even is this story?


I don't even know what the point of it is... Why was she upset?


Seriously I've read it five times and I have no idea why anybody in this story did what they did lmao


be me living in locale that uses metric measurement working in a deli with some girls the deli girls are teasing me, calling me old i hear a voice from the deli counter "how many grams in a pound" i reply "I'm not that old" turn around, realize I just said that to an older woman young deli girls go wide-eyed cringe i had a stroke reading that comment too, i did this for both of us. turns out it's just a pretty tame, boring story.


Holy shit. It makes sense now. I don’t know where you would make use of a talent like yours, but you certainly made sense of that fever dream.




Found drug guy


Then everybody clapped


The boomers were the ones who wanted it. It was the older folks (Silents and Greatest) who were against it at the time. I'm all for changing, as a scientist I've worked enough with metric units that I can "think"in metric, except for temperature. You tell me something is 5mm, I can visualize it just like I can visualize 1/4 of an inch.


Gen X learned the metric system in school. I am all for it so I don't need two sets of sockets, wrenches, allen keys, etc.


I am Gen X. Just stating a fact. The boomers were for it. The Greatest Gen and the Silents opposed it in the late 1970s.


0°C = Freezing 10° = Cold weather 20° = Warm weather 30° = Hot weather 100° = Boiling water


Yes as long as we quit lumping genX in with boomers.


Thank you


Ok boomer


Indeed. But like any other system of measurement, people are going to screw it.up.


Finally they will realize where the blame really belongs


Tell the other half of you to quit acting like fucking boomer juniors then


I am a millennial boomer so you guys aren't exempt. If you stop geing based and start being cringe, it's already too late for you.




Facebook is a boomer site, am I missing something?


I’m a boomer and I approve this message.


Hot Take: by then we'll BE the boomers who can't keep up with changing technology. Or it won't matter because we can't go outside due to the twice-weekly electrical tornado storm that scours the war-torn, bleak and blasted landscape.


But at least we’ll be able to measure the electrical tornado storm in meters!!!


Heck no. When I'm a boomer, they better have invented combustible lemons or I'm gonna be very displeased and will let their manager know my... Oh no, I've already become a boomer. The virus has taken hold.


Half the people don't even know boomers were born 46 -64


You mean 0.5 the people, amirite?


I know both so I really don't care.


And who're we gonna make fun of then? Let em have it el-ou-el.


We tried in the mid 80s . I was taught it in first grade. Maybe a tax break for using metric parts ??


[ Removed by reddit in response to a copyright notice. ]


It's a bot trying to pass as a human, don't be fooled!


My car gets 40 rods to the hogshead and that’s the way I likes it


I thought a yard was as long as, well a yard.


Lmfao. It wasn’t the boomers. It was that WWII didn’t destroy our factories. It was too expensive to retool. What was the boomers was letting manufacturing leave. So now… sure, go metric.


Boomers wont die, I mean the real ones will, but everyone keeps calling younger generations Boomers, gen-x, millennials, and heard one of my nephews friends call him a boomer and he's 14.


Yes, omg yes. Much easier math wise


Karma whore


I can’t wait until the boomers are dead, 20 years pass, and we get shit on by the generation after ours for whatever we fuck up. Everyone likes to think they’d do it different, but it simply isn’t the case. Yeah, me might fix some shit, but we’ll break some other shit in the process that ends up fucking a lot of good people over, ourselves included. It’s a cycle as old as time itself.




I can think of so many more important things to spend the hundreds of millions, if not billions on to fix this country, than a pointless conversion. The cost of every single sign, and market in the entire usa, reprinting every school book, just all of it, costs so much money. We have homeless, and starving and all this other stuff to do way before


Bam! Now more jobs created by the great conversion.


what's so hard about remembering 12in per foot, 3 feet per yard or 5280ft per mile?


It’s way harder than to multiply by 10 to find the nest scale.. 10x1mm=1cm, 10x1cm=10cm, 10x10cm=1m.. you get my point..


it gets even worse when you need to square or cube it /s


Actually there is a decimeter between cm and m so 10cm is 1 dm but no one cares.


It's less about those and more about the "I need a 30mm screw" instead of "I need a 1,181inch screw". Metric is scalable and precise all the time, imperial is not


How is that any different than "I need a 5/16 inch screw" instead of "I need a 7.9375 millimeter screw." Whether metric or US Customary units are used as no effect on precision. Units of measure or functionally arbitrary and any unit can be divided in any divisor.


I keep both metric and SAE wrench sets and when I need two wrenches, I just use a wrench from both sets.


Metric is much more simple? That's the only issue. Plus, names are even more simple and they don't sound fucking goofy.


and the units were established in a way that makes sense. A calorie is the amount of heat it takes to raise the temperature of 1 gram of pure water 1 degree C at sea level. 1kg of water is 1 liter of water which is 1000 cubic centimeters of water.


"In metric, one milliliter of water occupies one cubic centimeter, weighs one gram, and requires one calorie of energy to heat up by one degree centigrade - which is 1 percent of the difference between its freezing point and its boiling point. An amount of hydrogen weighting the same amount has exactly one mole of atoms in it. Whereas in the American system, the answer to "How much energy does it take to boil a room-temperature gallon of water?" is "Go fuck yourself", because you can't directly relate any of those quantities." -Wild thing, by Josh Bazell


> One BTU is the amount of heat energy required to raise one pound of water by 1ºF. Water weighs 8.33 pounds per gallon so we can calculate that one gallon of water requires 8.33 BTU to raise the temperature 1ºF. 212 - 72 = 140 degrees F 140 * 8.33 =1162.2 BTU


Neat, how often do you find yourself using that conversion? Like, are you sitting there thinking “well how many calories is it going to take to heat up this 23 cubic meter pool?”


Nope. I like measuring with random shit or people.


And the corrupt boomer joke we have in charge in the UK is making moves to switch us *back* to imperial... because... reasons


Hey, anything to see the UK crumble! But seriously, I feel the UK is having the worst troubles with their older voters. Wishing them the best


The best part is, the ones in charge seem to be attempting to kill off their voter base... making it harder than ever to pay for utilities and still be able to buy food... This winter just passed, an elderly lady in London was having to use her free bus pass to ride around on the buses all day because she could not afford to heat her home... BJ's reaction to this? "Isn't it good of me that I didn't take her bus pass away! What a wonderful person I am and look at the good job I am doing!"






Why wait if we do the switch today maybe we can hurry a few of them along. Maybe the housing market will finally swing in favor of the next generation.


The metric system is the tool of the devil! My car gets 40 rods to the hogshead and that's the way I likes it!


Canadians have been using metric for decades.


Please do. I am a boomer and after all these years I still struggle with pints. cups , teaspoons, dry versus liquid. I know feet to miles and feet to yards and so forth but there is a world wide system out there that is base 10 times better. Darn Caribbean pirates!


The change has already begun. It’s going


I think that is what we should focus change on. Yeah, the metric system for sure.


Don't wait for me. Let's do it now. 🙂


Boomer here. I remember reading a newspaper in 1974 that said the US would be completely metric by 1980. I'm 58 now and would still be pleased if we switched.


The metric system is for idiots who can only think in orders of magnitude.


I’m an Xer, but I was a premie. If I were born full term, I’d be a millennial. I am totally down to change to metric but I’m just gonna let y’all know up from imma be stupid for like 3 years.


Hell yes!




Metric FTW


I was taught the metric system in 2nd grade (in the US) and thought, “Cool! I won’t have to deal with feet per mile, pounds per bushel, and all that crap when I grow up.” Sigh. That was 55 years ago. Hey, don’t wait for me to go, folks, change away. -Technically a boomer










I work in Starbucks and the whole damn prep system works in liters


As an engineer, please yes. I'll do anything. Imagine having to do everything providing both units of measurement, but you're not sure what unit it was initially designed in, shifting the theory of tolerance stackup analysis.