uRabbit Senior Member Joined: 15 Jan 2013 Posts: 50 Location: Seattle, WA Expertise: I live coffee
Espresso: AeroPress Grinder: Bodum Bistro, Hario Mini Drip: Chemex Roaster: DOMA
Posted Tue Jan 29, 2013, 5:57pm Subject: Measure in fl. oz. or just oz.?
Should we be measuring water in fl. oz. on our scale, for use in the Chemex? We just thought of this. >.< We have been doing 21 oz. of water to 10 oz. of coffee. This gives us each five oz., but we noticed our 10 oz. cups are close to full when served.
Also, are mugs and cups listed as fl. oz. or oz.? Such as the Bodum Bistro 5 oz. cup with handle?
EDIT: Now I am even more confused! I tested our scale using oz. and fl. oz., and they measured the same. O.o
If your scale reads in fluid ounces there should be a way to enter the fluid density. Yours must be set to 1 oz/fl.oz., which happens to be the density of water at 212°F.
uRabbit Senior Member Joined: 15 Jan 2013 Posts: 50 Location: Seattle, WA Expertise: I live coffee
Espresso: AeroPress Grinder: Bodum Bistro, Hario Mini Drip: Chemex Roaster: DOMA
Posted Wed Jan 30, 2013, 6:13pm Subject: Re: Measure in fl. oz. or just oz.?
jpender Said:
If your scale reads in fluid ounces there should be a way to enter the fluid density. Yours must be set to 1 oz/fl.oz., which happens to be the density of water at 212°F.
A pint is APPROXIMATELY a pound only close to boiling. One of the reasons I hate English measurements.
1 oz of weight is 28.35g
1 fluid oz of volume is 29.57 cc.
at 4°C, 1.0 cc contains 1.0g of water. But when 1.0cc of water has 0.959g of mass (which at standard pressure and 99°C or very close to boiling), then 29.57cc (1 fluid oz volume of water) has a mass of 28.35g.
at 4°C (about 40°F), a pint is about 1.04lb, the world around. ;-D
Confusing? You bet. Just use metric grams.
The kool thing about the metric system is that the density of water is within 1% of 1g/cc from 0°C (but not frozen) to about 45°C (32°F ~ 115°F). Measure out 1liter of room temp brew water, and you're pretty darn close to 1000g. Measure out 1pint of brew water, and you'll have more like 16.7oz (av.) of water.
------------------------------------------ ----------------------------------------- Le café doit être noir comme le diable, chaud comme l'enfer, pur comme un ange, et doux comme l'amour.
"There is no right answer with coffee. There is only the elixir in your cup at the moment you partake."
"...I often say that when you can measure what you are speaking about, and express it in numbers, you know something about it; but when you cannot measure it, when you cannot express it in numbers, your knowledge is of a meagre and unsatisfactory kind;..." - Lord Kelvin RECIPES thread => http://www.coffeegeek.com/forums/coffee/machines/585708
Owww ! that hurts, 'cos you're talking American standard measurements not British (1824 Imperial) so don't blame us now even if you inherited it originally. (Imperial is a minefield of inconsistency too ;o)
SI units rule - except I still can't get my head around litres per 100km for fuel consumption.
Posted Fri Feb 1, 2013, 8:35am Subject: Re: Measure in fl. oz. or just oz.?
__________ Said:
Owww ! that hurts, 'cos you're talking American standard measurements not British (1824 Imperial) so don't blame us now even if you inherited it originally. (Imperial is a minefield of inconsistency too ;o)
SI units rule - except I still can't get my head around litres per 100km for fuel consumption.
At least we're not talking cubic cubits or cubic hands... LOL
I actually like fuel used per distance better. It just seems to me that fuel consumption is how much fuel you use to get somewhere. When we say "miles per gallon" it says that we went x miles with a set amount of fuel, which to me is the inverse of what I'd really like to know.
The BEST you can ever get in a vehicle for MPG is.... infinity? I hate infinity almost as much as Eng... Imperial units! ROFLOL
The best fuel consumption you can ever get in metric is ZERO.
The metric system has better discretion at the BAD range of the scale. 2MPG and 2.5MPG seem like the same. But it's the difference between 115 l/hkm and about 95 l/hkm.
I just think about it with benchmarks - 6.5 is pretty decent, 7.5 is a modern mid-sized non-hybrid sedan on the highway, 9.5 is so-so for a mid and horrible for a compact, 11.5 is a V8 sports car cruising on the highway, and 14.5 is a Gas Pickup. Those are roughly 35mpg/30mpg/25mpg/20mpg and around 15-17mpg.
5.5 is a small turbodiesel or a hybrid. (about 45mpg).
------------------------------------------ ----------------------------------------- Le café doit être noir comme le diable, chaud comme l'enfer, pur comme un ange, et doux comme l'amour.
"There is no right answer with coffee. There is only the elixir in your cup at the moment you partake."
"...I often say that when you can measure what you are speaking about, and express it in numbers, you know something about it; but when you cannot measure it, when you cannot express it in numbers, your knowledge is of a meagre and unsatisfactory kind;..." - Lord Kelvin RECIPES thread => http://www.coffeegeek.com/forums/coffee/machines/585708
Jmanespresso Senior Member Joined: 18 Jan 2009 Posts: 2,108 Location: Westchester NY Expertise: I live coffee
Espresso: Alex Duetto II Grinder: Compak K10 - Vario Vac Pot: Yama-SY5/SY8/TCA5 Drip: V60, Beehouse, CCD Roaster: Hottop B
Posted Fri Feb 1, 2013, 10:30am Subject: Re: Measure in fl. oz. or just oz.?
Wowzers.
Thats above my head.
However, I do weigh pretty much everything I do with coffee. Been doing it like since the start(ish).
Use grams on your scale. Its more precise, and it translates perfectly to when your doing small and big cups. Use more grams. No conversion.
Currently, in the V60, Im using 26grams of grounds. Put the whole setup on the scale(Vessel, V60, 26grams ground), tare it out, and pour 450grams of water. Might be a little different then what some use(I think Im using more water then some), but lately its been working nicely. I change it around though.
You can also use a simple base formula which I used to use before I weighed everything. 8grams to 4oz water. Multiply as needed. Alter for flavor as needed.
Also, unless you have measured your cups to be 10oz, then its likely they're not the volume they "say" they are.
Follow Your Bliss
Coffee makes your constantly overcome your prejudices and re-evaluate your own "received wisdoms" when it comes to judging cup flavors. -Tom Owen, SweetMarias
But you malign them wrongly in your example. I fluid oz (imperial = 28.41ml ***) of distilled water does actually weigh one ounce (imperial) at something like normal room temperature. The American measure you exemplified as misleading is a different volume.
I shall try to popularise mutchkins (sic) per perch (sic)........but I doubt it will catch on. ;o)
Miles per gallon is totally illogical where I live because we buy fuel in litres (it sounds cheaper that way). But they have to be published by law, and it's what everyone uses in daily life when complaining about the cost of motoring. It is also what my car's computer tells me, although it gets it slightly wrong.
In the meantime, back to the OP - without any reservations, strongly recommend you use Metric. It is so much simpler and consistent, and for all practical things I wouldn't use anything else, even though I was brought up in a pre-metric era.
I'm more than happy to work on 60gm coffee to 1 litre water as part of a far more logical and sensible way to measure the world.
Edit *** I'm confused now, 'cos my diary says it's 28.349....and I'm getting a headache.
Further edit *** in the interests of pedantry, (!) it is officially, 28.41307424375 ml - that is if you can find a scale that will handle it....
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