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#1
07-16-2008, 12:07 PM
 Unregistered Guest Posts: n/a
fluid ounces to pounds

how many pounds are in 46 fluid ounces
#2
07-16-2008, 04:00 PM
 Sandra Double Ultimate Supreme Member Join Date: May 2007 Location: California Posts: 1,956 Rep Power: 9
Re: fluid ounces to pounds

Quote:
 Originally Posted by Unregistered how many pounds are in 46 fluid ounces

46 / 16 = 2.875 pounds
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#3
07-17-2008, 03:15 PM
 JohnS Moderator Join Date: Dec 2007 Location: SE Michigan, USA Posts: 9,445 Rep Power: 19
Re: fluid ounces to pounds

Quote:
 Originally Posted by Sandra 46 / 16 = 2.875 pounds
Sandra,

That would be correct if he were asking about avoirdupois ounces (weight). He is asking about fluid ounces. Since they are a unit of volume, and pounds are mass, you have to know what the liquid is and it's density. 46 fl oz of air, water, and mercury would have very different weights.

Even for water, 1 pint (16 fl oz) weighs 1.043 lb (16.69 av oz), so a pint is not quite a pound, the world around.
(Especially not in Commonwealth countries where a pint is 1.25 lb, but not quite in the US either)
#4
07-17-2008, 05:16 PM
 Sandra Double Ultimate Supreme Member Join Date: May 2007 Location: California Posts: 1,956 Rep Power: 9
Re: fluid ounces to pounds

Sorry John, I thought it was a student that didn't know how many ounces were in a pound. I do know that troy weight is different but I wasn't aware that fluid ounces referred to volume instead of weight.
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#5
08-25-2010, 07:50 AM
 Unregistered Guest Posts: n/a
Re: fluid ounces to pounds

how meney pounds is 225 ounces
#6
08-25-2010, 11:06 AM
 JohnS Moderator Join Date: Dec 2007 Location: SE Michigan, USA Posts: 9,445 Rep Power: 19
Re: fluid ounces to pounds

Quote:
 Originally Posted by Unregistered how meney pounds is 225 ounces
In the avoirdupois system, 1 av lb = 16 av oz,
this is probably the answer to your question, as it is the pound and ounce for weighing most materials. The "avoirdupois" or its symbol is customarily omitted. So 225 oz is 14 lb 1 oz

However in the troy system (used for precious metals)
1 troy lb = 12 troy oz
(and both the ounces and pounds are a different size from avoirdupois.

If you meant fluid ounces, that opens a whole other can of worms as you need to know the density of the liquid.
#7
09-18-2011, 11:52 AM
 Unregistered Guest Posts: n/a
Re: fluid ounces to pounds

this is in cooking 25fl oz to lbs
#8
09-18-2011, 12:23 PM
 JohnS Moderator Join Date: Dec 2007 Location: SE Michigan, USA Posts: 9,445 Rep Power: 19
Re: fluid ounces to pounds

Quote:
 Originally Posted by Unregistered this is in cooking 25fl oz to lbs
25 fl oz of what? Different liquids have different densities.
#9
11-09-2011, 01:02 PM
 Unregistered Guest Posts: n/a
Re: fluid ounces to pounds

how many fluid ounces are in 12 pounds of aluminum?
#10
01-29-2012, 10:37 AM
 Unregistered Guest Posts: n/a
Re: fluid ounces to pounds

Quote:
 Originally Posted by JohnS 25 fl oz of what? Different liquids have different densities.
Hi John,
The liquid density is .885g/ml and you purchased it by the pound. How would you figure the cost per oz?

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