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Old 06-15-2010, 05:16 AM   #1
Rockweezy
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Default Adding DME to hit OG

How do you calculate how much DME to add in order to hit your OG if you are using a refractometer?

Today I took refractometer readings at 0 min (6 plato), 15 min (7 plato), 30 (8 plato), 40 min (between 8 and 9 plato). I was aiming at a FG of 11 plato, so I added a .5 lb DME in order to try to hit my OG as sort of a guess using Beer Tools, but was unsure at the time if it was right. Using a hydrometer after I adjusted for the temperature the OG was 1.045 (about 11 plate).

Is there any formula for how much DME to add at a certain time when you realize you aren't going to hit your OG? Examples would be fantastic!

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Old 06-15-2010, 02:40 PM   #2
BendBrewer
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You would need to know your points per gallon per pound of the DME and then do a little math.

Sorry, but I don't speak plato.

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Old 06-15-2010, 03:34 PM   #3
wonderbread23
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1lb of dry extract will raise the gravity of 1 gallon of wort 45 points. So.... say you have 5 gallons of wort at 1.040 and you wanted it at 1.055.

55-40 = 15 points short/gallon

15 points X 5 Gallons = 75 points need to be added.

75/45 = 1.67 lbs of DME to hit the proper gravity

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Old 06-15-2010, 03:52 PM   #4
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What White Bread said......

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