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Originally Posted by Sea
(OG - FG) x 1.05/.79 = ABV
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Huh?
The instructions with my AHB Fat Tire extract says (OG-FG)131=ABV%
Using the 1.05 OG and 1.012 FG that my kit says is average, your method results in 5.05 %abv, and AHB's comes out to 4.978 %abv.
Is your equation a more accurate way?