ABV Calculator
Calculate alcohol by volume and attenuation from your gravity readings
Gravity Readings
Gravity before fermentation
Gravity after fermentation
Results
Alcohol By Volume
5.25%
Attenuation
80.0%
Formula
ABV = (OG - FG) × 131.25
Attenuation = ((OG - FG) / (OG - 1)) × 100
About ABV Calculation
The ABV (Alcohol By Volume) calculator uses the standard brewing formula to determine the alcohol content of your beer based on the difference between the original gravity (before fermentation) and final gravity (after fermentation).
Temperature Correction: Hydrometers are typically calibrated at 60°F (15.6°C). If your readings were taken at a different temperature, enable temperature correction for more accurate results.
Attenuation: This shows what percentage of sugars were converted to alcohol. Higher attenuation typically means a drier beer, while lower attenuation results in a sweeter, fuller-bodied beer.