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Old 01-31-2009, 06:12 PM   #1
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Default Does someone have an efficiency formula?

I plugged this into BeerTools

6 gallon boil
5 gallon batch
10lbs Munich Malt
3lbs Midwest Wheat Malt
3oz Cascade 60 minutes

They estimated 1.063 OG at 72%. I got 1.080 at 67 degrees or 1.081.

The way I figured my efficiency last time was by changing the percentage until there estimated OG matched what I got.

Does someone have a formula to make this easier.

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Last edited by impatient; 01-31-2009 at 06:37 PM.
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Old 01-31-2009, 06:41 PM   #2
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I answered me own question.

Efficiency Calculator

Says I got 89%. Not bad for AG #2.

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Old 01-31-2009, 06:47 PM   #3
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gonna say
#G x ppg(35) /batch size = theoretical 100%

measured og/ theoretical=efficiency

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extraction calculator
grains in pounds(G) X 36(average points per gallon of grains) / batch size in gallons(g) = maximum efficiency(ME)
OG / ME = brewhouse efficiency

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Old 01-31-2009, 06:53 PM   #4
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Quote:
Originally Posted by eriktlupus View Post
gonna say
#G x ppg(35) /batch size = theoretical 100%

measured og/ theoretical=efficiency
I don't understand.
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Old 01-31-2009, 07:00 PM   #5
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13# x 35 / 5g = 91

81/91=89%eff

pounds of grain x 35pointpergallon / batch size = maximun extraction

actual extraction/maximun extraction = extraction efficiency

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extraction calculator
grains in pounds(G) X 36(average points per gallon of grains) / batch size in gallons(g) = maximum efficiency(ME)
OG / ME = brewhouse efficiency

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Old 01-31-2009, 07:08 PM   #6
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Quote:
Originally Posted by eriktlupus View Post
13# x 35 / 5g = 91

81/91=89%eff

pounds of grain x 35pointpergallon / batch size = maximun extraction

actual extraction/maximun extraction = extraction efficiency
Did you get the 35 from Palmers chart?
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Old 01-31-2009, 07:12 PM   #7
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Quote:
Originally Posted by impatient View Post
Did you get the 35 from Palmers chart?
nah, beersmith list the high end for the grains in the ingredients list. most are in the 34-37 range so 35 looked like a good average to use.
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extraction calculator
grains in pounds(G) X 36(average points per gallon of grains) / batch size in gallons(g) = maximum efficiency(ME)
OG / ME = brewhouse efficiency

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Old 01-31-2009, 07:18 PM   #8
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Quote:
Originally Posted by eriktlupus View Post
nah, beersmith list the high end for the grains in the ingredients list. most are in the 34-37 range so 35 looked like a good average to use.

Thanks....
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Old 01-31-2009, 07:53 PM   #9
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I've always calculated my efficiency per-boil. Is there a reason to do it post boil? Would come out the same I suspect anyway.

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Old 01-31-2009, 08:28 PM   #10
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ths works pre or post its just a linear function of gravity and volume when one goes up the other goes down.

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extraction calculator
grains in pounds(G) X 36(average points per gallon of grains) / batch size in gallons(g) = maximum efficiency(ME)
OG / ME = brewhouse efficiency

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