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Chuckeee

macrumors 68000
Aug 18, 2023
1,930
5,150
Southern California
And 1 litre is close to 1 US Quart.

In this computerised world, binary-based numbers are everywhere, often as multiples of 16. Many of us probably know 16, 32, 48, 64, 80, 96, 112, without even really thinking about them. MPH to KPH - multiply by 16 and divide by 10. Of course, dividing by 10 is so trivial it doesn't need any effort! I find it easier than 5/8 or 8/5.
Temperature: -40 degrees Celsius is the same as -40 degrees Fahrenheit 😊
 
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polyphenol

macrumors 68000
Sep 9, 2020
1,906
2,279
Wales
If we use units which aren't round numbers, that means we're working with a harder system.
We often see criticism of the need to use decimal for things like temperatures. That is, the degree Fahrenheit has some special property meaning we only need whole numbers. But Celsius is criticised because we often need 0.5! That might have some truth in terms of room temperatures. But none at all when it comes to cooking!

Probably the greatest number of non-metric spanners/bolt heads are actually not whole numbers. Worse, you have to go up and down the scale from eights, through quarters to halves. (Worse still if you are going down to sixteenths, thirty-seconds, etc.)

⅛, ¼, ⅜, ½, ⅝, ¾, ⅞

Then, if we go down to even smaller measurements, we miraculously jump to thousandths! How many thousandths in a sixty-fourth? Horrible.
 
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AlaskaMoose

macrumors 68040
Apr 26, 2008
3,519
13,373
Alaska
We often see criticism of the need to use decimal for things like temperatures. That is, the degree Fahrenheit has some special property meaning we only need whole numbers. But Celsius is criticised because we often need 0.5! That might have some truth in terms of room temperatures. But none at all when it comes to cooking!

Probably the greatest number of non-metric spanners/bolt heads are actually not whole numbers. Worse, you have to go up and down the scale from eights, through quarters to halves. (Worse still if you are going down to sixteenths, thirty-seconds, etc.)

⅛, ¼, ⅜, ½, ⅝, ¾, ⅞

Then, if we go down to even smaller measurements, we miraculously jump to thousandths! How many thousandths in a sixty-fourth? Horrible.
Some mechanical work requires the use of a 5.5mm socket, but if I don't have the socket at hand, I grab a 7/32" socket and use this one. In this case I am not paying attention to what calculator would show in relation to 5.5mm and 7/32" being approximately the same, or 0.21654". I do use the fractions 1/16", 1/32", and 1/64" when using measuring tapes :)
 
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DaveFromCampbelltown

macrumors 68000
Jun 24, 2020
1,564
2,550
Why is this even a thing? Are 5 or 6mm to far apart?

That said, I have them in both STD and DEEP. :oops:

They can be. At the small end of things, it is a 20% change to go from 5mm to 6mm, while 20mm to 22mm is only a 10% change.
I have a set of sockets that go 3.0 mm, 3.5, 4.0, 4.5, 5, 5,5, 6, 7, 8,....
Some bolt heads used in electronic equipment are even smaller, but they often use hex keys. My set starts at 1mm.
 

AlaskaMoose

macrumors 68040
Apr 26, 2008
3,519
13,373
Alaska
They can be. At the small end of things, it is a 20% change to go from 5mm to 6mm, while 20mm to 22mm is only a 10% change.
I have a set of sockets that go 3.0 mm, 3.5, 4.0, 4.5, 5, 5,5, 6, 7, 8,....
Some bolt heads used in electronic equipment are even smaller, but they often use hex keys. My set starts at 1mm.
You are correct. It gets more complicated in the smaller metric sizes and the large SAE sizes as well. I have some large size SAE wrenches that I seldom use. But the most common are small sizes that are interchangeable with metric sizes down to perhaps 3 or so mm. The smallest one I have used is the 5.5mm or 7/32 SAE.
Why is this even a thing? Are 5 or 6mm to far apart?

That said, I have them in both STD and DEEP. :oops:
I have both metric and standard (SAE) down to 5mm, although I have never needed a smaller than 5.5mm (7/32") socket or wrench.
 

Mousse

macrumors 68040
Apr 7, 2008
3,511
6,746
Flea Bottom, King's Landing
Worse, you have to go up and down the scale from eights, through quarters to halves. (Worse still if you are going down to sixteenths, thirty-seconds, etc.)
Speaking of scales and eighths. Why isn't music written in metric? Notes and rests are whole, half, quarter, eighth, sixteenth.

Why not decimalized music, as suggested by an AI with the IQ of 6000?;)

HOLLY: I've devised a system to totally revolutionize music.
LISTER: Get out of town!
HOLLY: Yeah, I've decimalized it. Instead of the octave, it's the decatave. And I've invented two new notes: H and J.
LISTER: Hang on a minute, you can't just invent new notes.
HOLLY: Well I have. Now it goes: (Singing) Do Re Mi Fa So La Wo Bo Ti Do. Do Ti Bo Wo La So Fa Mi Re Do.
RIMMER: What are you drivelling about?
HOLLY: Holrock. It'll be a whole new sound. All the instruments will be extra big to incorporate my two new notes. Triangles will have four sides. Piano keyboards the length of zebra crossings. Course, women will have to be banned from playing the cello.
 

Ctrlos

macrumors 6502a
Sep 19, 2022
876
1,911
My only concern with US measurements is the insistance on doing things by volume (ie X amount of cups of this) but then giving a limit on the number of eggs. If I am making something like shortbread this is fine as I can just increase the vessel size to make more samples but if its a sponge cake and it says "Use 6 cups of flour and 3 eggs" my recipe will end up very different if I change my shot glass to a mug to a pint glass.
 
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Apple fanboy

macrumors Ivy Bridge
Feb 21, 2012
55,456
53,304
Behind the Lens, UK
My only concern with US measurements is the insistance on doing things by volume (ie X amount of cups of this) but then giving a limit on the number of eggs. If I am making something like shortbread this is fine as I can just increase the vessel size to make more samples but if its a sponge cake and it says "Use 6 cups of flour and 3 eggs" my recipe will end up very different if I change my shot glass to a mug to a pint glass.
Reminds me of a story. Someone I know wanted to save cost on a big paint job. Decided to buy white paint and add a small pot of green paint to end up being a lighter green.
Well it was going to need 4-5 large trade white paint tubs. Needless to say the colour did not match!
 
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timber

macrumors 65816
Aug 30, 2006
1,160
2,127
Lisbon
My only concern with US measurements is the insistance on doing things by volume (ie X amount of cups of this) but then giving a limit on the number of eggs. If I am making something like shortbread this is fine as I can just increase the vessel size to make more samples but if its a sponge cake and it says "Use 6 cups of flour and 3 eggs" my recipe will end up very different if I change my shot glass to a mug to a pint glass.
That can also happen with SI units as eggs aren't exactly equal and eggs are also usually written by the unit.
We do remove a layer of potential problem because any recipe comes with flour by weight (usually grams). Using one of those measuring cups doesn't solve this issue most of the time?
Perhaps there is some reason why recipes aren't written with pounds or ounces or whatever?
 
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Herdfan

macrumors 65816
Apr 11, 2011
1,122
7,629
My only concern with US measurements is the insistance on doing things by volume (ie X amount of cups of this) but then giving a limit on the number of eggs. If I am making something like shortbread this is fine as I can just increase the vessel size to make more samples but if its a sponge cake and it says "Use 6 cups of flour and 3 eggs" my recipe will end up very different if I change my shot glass to a mug to a pint glass.

A "cup" is a very specific measurement. Not just whatever you grabbed off the shelf.
 

scubachap

macrumors 6502a
Aug 30, 2016
501
811
UK
A "cup" is a very specific measurement. Not just whatever you grabbed off the shelf.
I guess it has to be but it causes real confusion in this household when we look up US recipes... (I'm wondering if there's a titanium definitive cup kept securely under glass somewhere...?)
 
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mtbdudex

macrumors 68030
Aug 28, 2007
2,703
4,300
SE Michigan
Hey, only 52 posts away from the valued 2,000 post thread.
5 1/2 years old thread … keep it alive people.
Rinse n repeat the comments are all good ..
 

Ctrlos

macrumors 6502a
Sep 19, 2022
876
1,911
That can also happen with SI units as eggs aren't exactly equal and eggs are also usually written by the unit.
We do remove a layer of potential problem because any recipe comes with flour by weight (usually grams). Using one of those measuring cups doesn't solve this issue most of the time?
Perhaps there is some reason why recipes aren't written with pounds or ounces or whatever?
Eggs are nominal so that 50g of flour/sugar/butter can be added per oval.
 

Herdfan

macrumors 65816
Apr 11, 2011
1,122
7,629
I guess it has to be but it causes real confusion in this household when we look up US recipes... (I'm wondering if there's a titanium definitive cup kept securely under glass somewhere...?)

Emery%20Jensen%20Distribution%20LLC_61412xxA.epsxxMaxxxa63e84.jpeg


Every American kitchen has one or more of these.
 
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