ABV Calculator: Alcohol by Volume for Beer, Wine and Cider

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Specific gravity is the ratio of your wort density to water. Degrees Plato express the same as percent sugar by weight.
The standard formula is widely used and accurate within about 0.1% ABV. The alternate formula is more precise for high-gravity beers (OG above 1.080).
Hydrometer reading taken before fermentation. A typical pale ale starts around 1.048-1.054.
SG
Hydrometer reading taken after fermentation is complete. Most ales finish between 1.006 and 1.015.
SG
Total batch size in US gallons. Used to calculate total pure alcohol in the batch.
gal
Alcohol by VolumeStandard ABV
5.25%

Percentage of pure ethanol in the finished beverage

Alcohol by Weight (ABW)4.1%
US Proof10.5
UK Proof (degrees Sikes)9.2
Apparent Attenuation79.3%
Calories per 12 oz206kcal
Total alcohol in batch33.6fl oz
OG (SG)1.05
FG (SG)1.01
5.25% %
Session / Low<3.5Standard3.5-5.5Strong5.5-8Very Strong8+

ABV is 5.25% (10.5 proof US).

  • Apparent attenuation is 79.3%, a normal range for most ales and lagers. Fermentation appears to have proceeded well.
  • Each standard 12 oz serving contains approximately 206 kcal, coming from both the ethanol and residual sugars.
  • Alcohol by weight is 4.10%. US proof is 10.5, meaning every label claim of "proof" can be converted back to ABV by halving it.
  • Standard lager, pale ale, and most wheat beer land in this range.

Next stepAlways take two final-gravity readings 48 hours apart to confirm fermentation is complete before packaging. A stable FG means fermentation has finished.

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