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.