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Old 09-05-2012, 06:04 PM   #31
ahaley
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So I just took my gravity reading and my SG was 1.052, and 2 weeks later it's about 1.012. Sound about right? I'll bottle tomorrow if it's stable, but I was a little shocked when I saw the low abv. If I read it correctly 1.012 = about 2%? Oh well! It taste like flat beer so I'm happy so far!


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Old 09-05-2012, 07:26 PM   #32
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I'm not sure where u got the 2%, but that is more like 5.3%


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Old 09-05-2012, 07:28 PM   #33
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Not sure where u got the 2%, but that's more like 5.3% ABV
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Old 09-05-2012, 08:25 PM   #34
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Quote:
Originally Posted by Jdaught
Not sure where u got the 2%, but that's more like 5.3% ABV
Maybe I looked at it wrong but I'll send a picture up

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The top of the napkin is at 1.012 and 5% is way below, wouldn't I read straight across?
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Old 09-05-2012, 09:01 PM   #35
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You need to use the OG and FG to determine your ABV%

((1.05 x (OG – FG)) / FG) / 0.79

Based on your numbers its around 5.3% as jdaught stated above
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Old 09-05-2012, 09:10 PM   #36
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I've never tried to read ABV off of the hydrometer. I always use the formula stated above. I would recommend writing it down and using it from now on.
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Old 09-05-2012, 09:17 PM   #37
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Oh snap I didn't k ow there was a formula, thanks guys I'll add that to my notes!
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Old 09-05-2012, 09:19 PM   #38
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Quote:
Originally Posted by tally350z
You need to use the OG and FG to determine your ABV%

((1.05 x (OG – FG)) / FG) / 0.79

Based on your numbers its around 5.3% as jdaught stated above
Where does 1.05 come in as well as .79? Are those constant numbers?
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Old 09-05-2012, 10:37 PM   #39
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They are constant numbers.
1.05 is the number of grams of ethanol produced for every gram of CO2 produced and .79 is the density of ethanol.
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Old 09-05-2012, 10:40 PM   #40
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U could also just search for ABV calculator online and skip the math.


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