How to calculate ABV?

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Re: How to calculate ABV?

Postby turbo_ale » Tue Aug 19, 2014 8:01 am

dmtaylor wrote:
MullerBrau wrote:The calculation is probably not linear; that's why you see .128 or .131 or .13125 as a multiplier.


Correct, it is a non-linear relationship. At low gravity, the multiplier is closer to 128. At high gravity, the multiplier is as high as 132 or so. In any case you can just use 130 or 131 all the time and get the right answer within 0.1% ABV.


Like the Co2 carbonation/pressure chart, would be nice to see a chart for ABV in that format. 12% beers using 132 down to the 3% sessions using 128.
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Re: How to calculate ABV?

Postby CA_Mouse » Tue Aug 19, 2014 1:36 pm

turbo_ale wrote:Like the Co2 carbonation/pressure chart, would be nice to see a chart for ABV in that format. 12% beers using 132 down to the 3% sessions using 128.


I could toss one together if someone has a reference to where I can get the actual gravity break down relevant to the multiplier. I will see if I can dissect the formulas on MullerBrau's site in the mean time.
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Re: How to calculate ABV?

Postby dmtaylor » Wed Aug 27, 2014 3:45 pm

Heh heh heh.... I found this from alt.beer.home-brewing from 2004. That's where I learned the truth. :twisted:

https://groups.google.com/d/msg/alt.bee ... YSP2gId8UJ
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