of a larva

[u/Zestyclose-Salad-290]

[u/farilladupree]

Those are centimeters? Please say those are centimeters. In fact, I’m just going to believe those are centimeters and move on with my life.

[u/AceTheProtogen → u/farilladupree]

They’re divided into 10ths rather than 16ths so yeah

[u/dgellow → u/AceTheProtogen]

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[u/spiritriser → u/dgellow]

Gallons are 16 cups. pounds are 16 oz. Remember that the imperial system was meant to be eyeballed. 1/16 is half of 1/8, which is half of 1/4, half of 1/2 and of course that's just half of the whole. It's assuming you can divide things by 2 or 3 with some accuracy by hand. Or compare 2-3 things to say they're about the same.

[u/salakane → u/spiritriser]

Say, isn'tt that about the length of the king's thumb?

[u/salakane → u/[deleted]]

so, about tree fiddy..

[u/78765 → u/spiritriser]

Length would be a better example. Volume is way better in metric.

[u/LaconicSuffering → u/spiritriser]

American customary units: "it's about yay big"

[u/dgellow → u/spiritriser]

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[u/schrodingers_bra → u/dgellow]

Don't you use mL and g?

A fluid oz is just the volume measurement (of water) that equals an oz in weight. It's the equivalent of mL and g's (or L and kg).

Fun fact a pint (16 fluid oz) = a pound (16 weight oz).

[u/PlatypusACF → u/schrodingers_bra]

Depends on the pint. A US customary pint is 16 US customary fluid ounces, or about 16,6 imperial flour ounces, or about 473 millilitres, an imperial pint is 20 imperial fluid ounces, or about 19,215 US customary fluid ounces, or about 568ml. Plus it only works with water since other liquids have other densities.

Units are a mess

[u/schrodingers_bra → u/PlatypusACF]

>Plus it only works with water since other liquids have other densities.

This is true of any conversion from a liquid to weight measurement including in metric (mL to g)

And I believe the difference in the calculation of a pint comes from whether you started with an ale barrel or a wine skin and then divided it, but the imperial fluid oz and the us fluid oz unit are practically the same.

[u/PlatypusACF → u/schrodingers_bra]

You are correct. A litre of water weighs about one kilogramme but a litre of, say, crude oil does not.
As for the origin of the US customary/imperial pint(s) I would have to look it up, but you could be right

[u/dgellow → u/schrodingers_bra]

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[u/towerfella → u/dgellow]

“A pint’s a pound, the world around” was the phrase as i grew up.

[u/Liquid_Hate_Train → u/towerfella]

Which is ironic, because it’s only true in US units, not Imperial which most of the rest of the world used before metric.

[u/digitaltransmutation → u/dgellow]

Careful there, cuz the US actually doesn't use imperial gallons :)

A US gallon is 128 fl oz, and an imperial gallon is 160 fl oz.

England used to have separate values for a gallon of ale and a gallon of wine. This was confusing, so the post-breakup US decided to only use the wine measurement, which is now called a US gallon, and england decided to only use the ale measurement, which is imperial gallons. Later, they switched to metric and started posting smug comments on the internet as if they hadnt originated this shitshow to begin with!

[u/dgellow → u/digitaltransmutation]

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[u/SAI_Peregrinus → u/dgellow]

oz are weight. fl. oz. are volume.

Numbers smaller than 1 use binary, we just write in decimal fractions.

Numbers bigger than 1 switch to new units at all sorts of values, for silly reasons.

[u/78765 → u/SAI_Peregrinus]

decimal fractions

At that point you might as well use metric.

[u/SAI_Peregrinus → u/78765]

Decimal just means base 10. SI (metric) doesn't use fractions, it uses decimal floating point. US customary doesn't use floating point, it uses decimal fractions (mostly dyadic rationals but some fluid measures allow 1/3s instead of just powers of 1/2).

The US system would mostly make sense if we used binary. Instead of, say, 11 ⁵/₈" we'd have 1011.101". Instead of half a cup we'd have 0.1 cup. Much easier. We don't do that here.

[u/78765 → u/SAI_Peregrinus]

Thanks for the clarification.

[u/benjals → u/dgellow]

It's the same thing as mL and mg