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Old 08-25-2011, 02:56 AM   #1
Aug 2011
jacksonville, florida
Posts: 226
Liked 1 Times on 1 Posts

Can anybody give me any advice on the formula for getting my gravity. I check the og after the boil and before I pitch the yeast we pour some in the tube that came with hydrometer and check the temp then the og. Then I check the final gravity at the end of secondary before I add the priming sugar. Then you subtract final from og and take what's left and multiply it by what number? We had the number but I can't rember it right now.(Wasn't shooting for a specific gravity so that's why I took it before I bottled and didn't check it earlier to get it at a certian gravity). The product of the formula kept coming out to like 13% and I know that's not right. Tried it three times and the og was always the same and it was all different batches. It's a dme base with a mini mash grain sac bag if that helps. The beer almost always turns out good and 1 just took second place in a home brew comp so it taste good just frustrated in having a hard time figuring the gravity out. If you have any advice it would be greatly appreciated! Thanx cheers!

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Old 08-25-2011, 03:36 AM   #2
Kayos's Avatar
Dec 2006
Santa Clarita, SoCal
Posts: 1,364
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I am not that smart. Here ya go!
Being Dealt (kegged): Carbed Crystal light lemonade for the boys, Delta Bravo IPA, Applewinder
Primary: Climbing stout
Primary #2: ESB
Big Blind: Pucker Bitter
Small Blind:
Tasty Remembrances: White 'N Nerdy, Dynamite Red (Hop bursted), APA, The Bonaduce (irish Red), runners stout, ridgeback brown,

from my big ass computer sitting on my floor

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Old 08-25-2011, 03:53 PM   #3
Feb 2011
Yorba Linda, CA
Posts: 916
Liked 46 Times on 38 Posts

I think you are looking for the ABV (alcohol content)? To get that take your OG which is your wort in your fermenter before adding yeast. Then take a reading after fermentation is complete which is your FG. Take the difference and multiply by 131.

So if your OG is 1.050 and your FG is 1.012, you have 1.050-1.012=0.038*131=4.98% alcohol

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