this post was submitted on 17 Oct 2026
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[–] lauha@lemmy.world 76 points 2 days ago* (last edited 2 days ago) (7 children)

Metric is great for scientists in a lab with equipment to measure things.

Metric is just as great for everyday life as imperial units.

Also, a foot can be divided equally into 2, 3, 4, or 6 equally-sized pieces without resorting to estimation or irrational numbers; a meter cannot.

While I agree in principle, I also enjoy the chaos that imperial system causes when you try adding up 1 1/8 inches + 5 27/32 inches + 7 3/16 inches instead of just using decimal numbers.

Edited for clarity

[–] surewhynotlem@lemmy.world 48 points 2 days ago (1 children)

Metric is just as great for everyday life as imperial units.

This is what the metricians say to feel better about themselves, but they never mean it.

"Oh yes, I'll have a 236.588 milliliters of tea, thank you for offering"

"The kids are out playing in the back 0.914 meters"

"Doctor, I think I broke my left 30.48 centimeters"

Do you see how silly you would sound if you didn't use imperial?

[–] TrickDacy@lemmy.world 28 points 2 days ago

I was co confused until I got the joke lol

[–] wonderingwanderer@sopuli.xyz 2 points 1 day ago (1 children)

That's easy, 14 5/32

(Yes, I did it in my head. Yes, I am chaos)

[–] lauha@lemmy.world 1 points 1 day ago (1 children)
[–] wonderingwanderer@sopuli.xyz 1 points 1 day ago

a murmur rises from the deep...

"you're welcome"

[–] aMockTie@piefed.world 7 points 2 days ago* (last edited 2 days ago) (1 children)

1 1/8 inches + 5 27/32 inches + 7 3/16 inches

1/8 = 4/32
3/16 = 6/32
4 + 6 + 27 = 37
37/32 = 1 5/32
1 + 5 + 7 + 1 = 14
Total: 14 5/32

I wouldn't call it chaos, it's a straightforward algorithm:

  1. Identify the largest denominator
  2. Multiply each other fraction by [largest denominator divided by current fraction's denominator] (e.g. 32/8 = 4, so 1/8 * 4/4 = 4/32)
  3. Determine the sum of every numerator
  4. Divide and simplify the number if necessary
  5. Determine the sum of the integers, including any integers added in the previous step

This works for every measurement because the denominator is always a power of 2.

With that said I absolutely prefer metric.

[–] tempest@lemmy.ca 9 points 2 days ago (2 children)

In practice you would just use decimal inches. Doesn't really make it better but you can machine something without ever seeing a fraction if you want to since everything will be in thousandths of an inch.

[–] HeyThisIsntTheYMCA@lemmy.world 4 points 1 day ago (1 children)
[–] livingheart@sh.itjust.works 2 points 1 day ago (1 children)

most electronics breadboards and the pins from (non-tiny) microchips / ICs are spaced at 2.54mm apart, which i eventually realised is a tenth of an inch.

[–] HeyThisIsntTheYMCA@lemmy.world 1 points 22 hours ago

hey none of that mathematics witchery here dude. we guesstimate or we do nothing (and i'm too tired to guess)

[–] aMockTie@piefed.world 5 points 2 days ago

Maybe in your particular industry, but I reckon most people using imperial units aren't using measuring devices with decimal inches or needing the precision of .0001"

[–] taiyang@lemmy.world 7 points 2 days ago (1 children)

Wheeeeeeee fractions!

But after multiplying, 8 + 54 + 3 over 64 is just clean fun, you end up with 14 1/64 inches and wanna die because you accidentally cut the material at 14 inches and now your whole day is ruined.

I'm using some pvc to build a prototype and the percentage of it that turns to microplastic so I can get precise sizing is terrifying. But I'ma use the chop saw we got instead of buying new, larger pvc scissors

[–] JoeBigelow@lemmy.ca 7 points 2 days ago (2 children)

If someone were adding those figures they would switch to decimal. I built furniture for 2 years, 64ths are almost never used over thousands of an inch. If you need to be finer than 32nds you use thou. And that pretty much only for wood. Machine shop I worked in used thou exclusively.

[–] starik@lemmy.today 14 points 2 days ago (1 children)

thousands of an inch

Which is called a “mil”, a name that has never caused confusion

[–] Instigate@aussie.zone 4 points 1 day ago (2 children)

Is it really? That’s really interesting, and would cause a lot of confusion in metric-English countries where ‘mil’ is pejoratively used in speech to either mean ‘millimetre’ or ‘millilitre’ depending on context.

[–] starik@lemmy.today 5 points 1 day ago

It causes confusion in the US too, because, despite popular misconceptions, we do in fact use both systems.

[–] livingheart@sh.itjust.works 1 points 1 day ago

pejoratively ≠ casually

[–] lauha@lemmy.world 5 points 2 days ago

While in theory it is like that, I as a non english speaker have come across people trying to add up inch fractions more time than I remember.

[–] JustPlainDave@lemmy.zip 5 points 2 days ago (2 children)

Having done my share of automotive and carpentry work, I've never in my life had to go down to 64ths. 32nds is the smallest fraction I've ever had to use and the amount of times I've had to get that small could probably be counted on one hand.

[–] lauha@lemmy.world 14 points 2 days ago (1 children)

Are you saying adding 8ths, 16ths and 32nds is trivial and having 64th in my example made it unrealistic?

[–] JustPlainDave@lemmy.zip 1 points 2 days ago (1 children)

I'm saying that if you knew what you were talking about you wouldn't be working in 64ths in the first place. You picked 64ths because "hurr sure Americans dumb" and you know it.

[–] lauha@lemmy.world 7 points 2 days ago (1 children)

I picked 64 because I don't use imperial and I have no sense of scalw what makes sense as a fraction unit. A bit paranoid, aren't you?

[–] mkwt@lemmy.world 2 points 1 day ago (2 children)

In US machine shops if they're getting down to that level of measurement, they'll switch over to milli-inches.

Yes, milli-inches are an actual unit in use.

[–] wonderingwanderer@sopuli.xyz 4 points 1 day ago

Why don't they use 1024^th^s? Gotta commit to the bit if you wanna be taken seriously.

[–] JustPlainDave@lemmy.zip 1 points 1 day ago

Yes, machine shop use thousandths, but 99.9% of the population will never do that.

[–] HeyThisIsntTheYMCA@lemmy.world 1 points 1 day ago (2 children)

Chaos? Just normalize to a denominator of 32 and it's simple

[–] gazter@aussie.zone 3 points 1 day ago

A denominator of 1 makes it even simpler

[–] Schemen110676@lemmy.ml 2 points 1 day ago

Or normalize to something sane and use mm