Homebrew ABV Calculator
Estimate the alcohol by volume and attenuation of your beer or wine from original and final gravity.
Inputs
Results
Alcohol By Volume
5.25 %
Apparent Attenuation
80 %
How it's calculated
ABV = (original gravity − final gravity) × 131.25, the standard homebrew approximation. Apparent attenuation = (OG − FG) ÷ (OG − 1) × 100 — the share of sugars the yeast fermented.
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