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Home Brew Forums > Home Brewing Beer > Beginners Beer Brewing Forum > Is 1 LB (pound) always by weight or by measure?
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Old 11-03-2009, 05:18 PM   #1
neldred
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Default Is 1 LB (pound) always by weight or by measure?

Do you guys generally call one LB (of say DME or grain) 16 oz (in a measuring cup), or 1 actual pound of weight on your precision scale?

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Old 11-03-2009, 05:19 PM   #2
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Weigh it, volume doesn't work.

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Old 11-03-2009, 05:22 PM   #3
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Weight and volume are not the same thing....You weigh the dry goods

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Old 11-03-2009, 05:27 PM   #4
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The scale doesn't have to be 'precision' per say... a cheapo food scale will work for grains and generally hops

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Old 11-03-2009, 06:00 PM   #5
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There are fluid ounces and weight ounces. Weight measures weight, fluid ounces measures volume. There are 16 weight ounces in a pound. There are APPROXIMATELY 16 fluid ounces of water in 1 lb of water, (but not exactly). LME weighs much more, so there are FEWER than 16 fluid ounces in 1 lb of LME, (but still 16 weight ounces). DME weighs less, so there are MORE than 16 fluid ounces of DME in 1 lb of DME. You need to know the density of a certain thing, (and how well it's packed, if it's a solid like DME), to convert between fluid ounces and weight ounces.

To sum up:
1 lb DME = 16 ounces DME
16 ounces DME = MORE than 16 fluid ounces DME
1 lb LME = LESS than 16 fluid ounces LME
1 lb water = ABOUT 16 fluid ounces water.

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Old 11-03-2009, 07:49 PM   #6
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Thanks guys. It sounds like if I actually weigh the DME, grains, hops, invert sugar, etc I'll be ok. I have a nice (but inexpensive) digital scale that does grams, oz, lbs, klgs up to 8 lbs as small as 1 gram.

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Old 11-03-2009, 08:17 PM   #7
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Quote:
Originally Posted by shortyjacobs View Post
To sum up:
1 lb DME = 16 ounces DME
16 ounces DME = MORE than 16 fluid ounces DME
1 lb LME = LESS than 16 fluid ounces LME
1 lb water = ABOUT 16 fluid ounces water.
Except I've never seen a "fluid" oz of dry malt extract....

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Old 11-03-2009, 09:19 PM   #8
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Quote:
Originally Posted by mmb View Post
Except I've never seen a "fluid" oz of dry malt extract....

Yup, I know....fluid ounces are traditionally only used for, well, fluids...but they are a valid measurement of volume, and hence could be used for dry things. Like I said, there's only meaning to it if you include density or packing fraction.
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Old 11-04-2009, 03:49 PM   #9
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A "pound" is a measure of weight, period.

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Old 11-04-2009, 04:11 PM   #10
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Quote:
Originally Posted by TexLaw View Post
A "pound" is a measure of weight, period.
Except when it a unit of currency. You would think they could come up with some other words instead of re-using all the same ones.
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