Author Topic: Determining gravity contribution of sugars added during fermentation  (Read 4741 times)

Offline jivetyrant

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The title pretty much says it all.  Is there a way to accurately calculate the gravity contribution of sugars (ie: 1 lb of turbinado sugar) to a beer already in fermentation?  Thanks!

Offline Kaiser

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Re: Determining gravity contribution of sugars added during fermentation
« Reply #1 on: March 23, 2011, 06:22:04 AM »
The OG contribution is the same that it would have had if you added it to the wort.

Turbinado sugar is contributes pretty much 100% of its weight to the OG thus it adds 46 pppg. The volume is the volume of beer. If you want to be more precise you would include the increase in beer volume when you add the sugar. Each lb of sugar adds about 0.3 qt of volume. But I don’t think that that will make enough of a difference.

Kai

Offline jivetyrant

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Re: Determining gravity contribution of sugars added during fermentation
« Reply #2 on: March 29, 2011, 04:31:28 AM »
At the risk of sounding noobish, what does 46ppg mean? :X

Offline jeffy

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Re: Determining gravity contribution of sugars added during fermentation
« Reply #3 on: March 29, 2011, 04:49:35 AM »
At the risk of sounding noobish, what does 46ppg mean? :X
Gravity points per gallon.  If you had a specific gravity of 1.046, the gravity points would be 46.
Jeff Gladish, Tampa (989.3, 175.1 Apparent Rennarian)
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Offline hokerer

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Re: Determining gravity contribution of sugars added during fermentation
« Reply #4 on: March 29, 2011, 09:50:34 AM »
At the risk of sounding noobish, what does 46ppg mean? :X

Points per Pound per Gallon.  That is, if your sugar is 46ppg, then one pound of that sugar in one gallon would give you 46 points, aka 1.046 gravity.
Joe

Offline ryang

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Re: Determining gravity contribution of sugars added during fermentation
« Reply #5 on: March 29, 2011, 02:23:54 PM »
and thus if you added one pound to 5 gallons, it would bump your gravity up 9 points (46/5 = 9.2)

which would show for example your gravity going from 1.045 to 1.054

Offline jivetyrant

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Re: Determining gravity contribution of sugars added during fermentation
« Reply #6 on: March 29, 2011, 07:00:39 PM »
excellent, thanks for the clarification!