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Old 10-22-2007, 05:19 PM   #1
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Default Pounds to Cups?

Does anyone know the relation of pounds to cups? I have a recipe for a maple wheat and it calls for 2 lbs of maple syurp, I would like to know how many cups that is. I really hate to try to find a weight scale to mesusre it.

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Old 10-22-2007, 05:22 PM   #2
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Quote:
Originally Posted by Aiko
Does anyone know the relation of pounds to cups? I have a recipe for a maple wheat and it calls for 2 lbs of maple syurp, I would like to know how many cups that is. I really hate to try to find a weight scale to mesusre it.
D cups = a lot of pounding.

(sorry)

You have to look at the weight and volume of the package and figure it out from there. It's going to depend on the gravity of the liquid.
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Old 10-22-2007, 05:24 PM   #3
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A cup of water weighs roughly 1/2 a pound. So, for a rough guess, use slightly less than 4 cups (syrup weighs more than water).

If you're serious about brewing, I suggest getting yourself a good scale. Most brew ingredients are measured by weight.

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Old 10-22-2007, 05:24 PM   #4
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Like CF said.

One is a volume the other is a weight.
So it changes dependant on what you are measuring.

A lb of sugar is less in cups than a lb of flour in cups.

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Old 10-22-2007, 05:28 PM   #5
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if you goto this site http://www.angelfire.com/bc/incredib...htmeasure.html

itll give you a pretty good breakdown of food products weight conversions with cups to lbs

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Old 10-22-2007, 05:32 PM   #6
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Quote:
Originally Posted by Yuri_Rage
A cup of water weighs roughly 1/2 a pound. So, for a rough guess, use slightly less than 4 cups (syrup weighs more than water).

If you're serious about brewing, I suggest getting yourself a good scale. Most brew ingredients are measured by weight.
If a heavy wort can weigh 1.10, that's 10% more than water. Syrup's gravity ha sto be MUCh higher.

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Originally Posted by http://janus.state.me.us/legis/statutes/7/title7sec892-A.html
A. "Grade A Light Amber" means pure maple syrup that is free of any material other than pure, clear liquid maple syrup in sanitary condition; has a color no darker than the federal Department of Agriculture's visual color standard light amber or has a color for light transmittance not less than 75.0%Tc; has a delicately sweet, original maple flavor; and has a density of at least the equivalent of 66.0` Brix at 60` Fahrenheit Modulus 145. Grade A Light Amber maple syrup must be free of sugar crystals and may not be damaged in any way.
I think water is about 0 brix.


This means that it is 66% heavier than water. Ergo...

Quote:
Originally Posted by Yuri Rage
A cup of water weighs roughly 1/2 a pound.
They you need to figure that 4 cups = 2 pounds water. Multiply that by .66 and you get 2.64 cups = 2 pounds maple syrup.
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Old 10-22-2007, 05:33 PM   #7
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Quality maple syrup has an average density of 66-67.9˚ Brix. http://ohioline.osu.edu/for-fact/0036.html

Quote:
The density should be at least 66 Brix (66 percent solids) and not much more than about 67 to 67.5 Brix. Less than 66 and it is not legally maple syrup, it will be very thin, and will not store as well.
That gives a SG of 1.3275, so density = 1.3275kg/L

One pound = 0.45359237kg, so 2lb = 0.9071kg

One US cup = 236.58mL

So, putting it all together:

(0.9071kg)*(1L / 1.3275kg) * (1000mL / 1L) * (1 cup / 238.58mL) =2.87 cups
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Old 10-22-2007, 05:35 PM   #8
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I do a lot of converting recipies from cups, tablespoons and teaspoons to lbs and ounces for commercial production.

My list of approximate measurements of foods and food ingredients has maple syrup listed at 11oz for 1 cup.

So you need 2.9 cups. Round up to 3 and you'll be fine

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Old 10-22-2007, 05:36 PM   #9
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I just found a reference saying that an average gallon of maple syrup weighs 11 lbs. Using that as a baseline, use 2.91 cups.

http://www.motherearthnews.com/Whole...ple-Syrup.aspx

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Old 10-22-2007, 05:43 PM   #10
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Quote:
Originally Posted by mrkristofo
Quality maple syrup has an average density of 66-67.9˚ Brix. http://ohioline.osu.edu/for-fact/0036.html



That gives a SG of 1.3275, or a density of 0.88945 kg/L.

One pound = 0.45359237kg, so 2lb = 0.9071kg

One US cup = 236.58mL

So, putting it all together:

(0.9071kg)*(1L / 0.88945kg) * (1000mL / 1L) * (1 cup / 238.58mL) = 4.27cups.


PM me, and I'll give you the shipping address where you can send some homebrew.
Your math is flawed. If the SG is 1.3275, the weight has to be more than that of water, and your results show the opposite. I don't know enough about brix to density conversion to fix it.
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