percentage - Home Brew Forums

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10-24-2008, 09:42 PM   #1
leejoe
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Oct 2008
UK
Posts: 18

how do i know what the ABV is of my home brew

10-24-2008, 09:47 PM   #2
Parker36

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Sep 2007
Lesotho
Posts: 4,742
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10-24-2008, 09:48 PM   #3
leejoe
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Oct 2008
UK
Posts: 18

what calcukations please ? sorry if i seem stupid

10-24-2008, 09:51 PM   #4
Parker36

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Sep 2007
Lesotho
Posts: 4,742
Liked 22 Times on 20 Posts

I just use beersmith to do it for me, or you can do it long hand, or enter it in here: Hydrometer Correction

10-24-2008, 09:51 PM   #5
lucky2balive
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Jul 2008
Merced California
Posts: 76
Liked 1 Times on 1 Posts

(og-fg)*131.3

http://www.howtobrew.com/section1/chapter9-4.html

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10-24-2008, 09:52 PM   #6
leejoe
Recipes

Oct 2008
UK
Posts: 18

how much does it vary or is there a rough average and how can i make it stronger if it is a variable

10-24-2008, 09:53 PM   #7
batches_brew

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Jul 2008
Hollyweed
Posts: 156

(Og-Fg )*129= Abv

question, why do different references use different numbers to multiply by?
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10-24-2008, 09:55 PM   #8
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Jan 2008
Milwaukee WI / Mankato MN
Posts: 356
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take the differance between the two readings multiply by 1.1 then by 1.5 you will then have your content

10-24-2008, 09:57 PM   #9
lucky2balive
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Jul 2008
Merced California
Posts: 76
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Quote:
 Originally Posted by batches_brew Og - Fg = A * 129= Abv question, why do different references use different numbers to multiply by?
That's a really good question. I don't even remember where I got mine. Either How To Brew or some random web site reference.
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10-24-2008, 09:59 PM   #10
leejoe
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Oct 2008
UK
Posts: 18

so when i bottle i take a hydrometer readinfg then one when ready and do the math! can i make it stronger or do i just have to see how it truns out ?