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Old 03-29-2008, 08:09 PM   #1
Seawolf
 
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I forgot to take my F.G. and I was wondering how to reverse engineer my false F.G.

I added 3/4 C priming sugar to 5 gallons of a Hoegaarden clone, then took my gravity reading. It was obviously way too high because of the priming sugar, so can anyone help me solve this? I don't know how much gravity that much sugar added to my beer.


Thanks!!
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Old 03-29-2008, 08:20 PM   #2
sittingturbo
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Well I think... 3/4 cup is about 5 oz. so if you used corn sugar. That should have added a total of 12.5 total gravity points. [(40 ppp/g) so (40/16oz. * 5oz.)] Then divide that by I'm assuming 5 gallons. Gives you an additional 2.5 points.

So lets say your gravity now is 1.012(5) your real final gravity should have been 1.010

Am I right everyone? Let me know if this is not right. Good luck!
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Old 03-29-2008, 08:33 PM   #3
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Right, priming sugar typically adds ~2 points to the gravity or 1/4% ABV.
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Old 03-30-2008, 03:31 AM   #4
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I do this routinely. It is easier in my bottling process to wait until the end to check the FG. I don't recommend this for beginners. I've been brewing for 20+ years and know when my fermentation and conditioning are done.

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Old 03-30-2008, 05:34 PM   #5
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subtract .002 from your read FG. priming sugar doesn't screw up your reading by much.
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Old 03-30-2008, 06:39 PM   #6
Seawolf
 
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My F.G. was also high than the recipe because I added 1/2 lb extra flaked wheat. So, between that and the priming sugar, I was 8 points off of my target F.G. of 1.008, but right on target for attenuation.

Thanks for the help!!
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