ABV Calculator

Calculate Alcohol By Volume (ABV) from original and final gravity readings. Essential for home brewers and winemakers.

Inputs

Original Gravity (OG)

Final Gravity (FG)

Tab to move between fields

Results

ABV (Alcohol By Volume)

5.25%

ABW (Alcohol By Weight)4.2%

Apparent Attenuation80%

Calories (per 12oz)869

How to Use This Calculator

Measure and enter the Original Gravity (OG) of your liquid before fermentation.
After fermentation is complete, measure and enter the Final Gravity (FG).
The calculator computes ABV, ABW, apparent attenuation, and estimated calories per 12 oz.
Use the results to confirm fermentation is complete and label your product accurately.

How the result changes with Original Gravity (OG)

Original Gravity (OG)	ABV (Alcohol By Volume)
1.01	0%
1.05	5.25%
1.1	11.81%
1.14	17.06%

What each input means

Original Gravity (OG): Specific gravity before fermentation.
Final Gravity (FG): Specific gravity after fermentation.

How this is calculated

Worked example, using the default values

Identify Input Parameters
Original Gravity (OG) = 1.05, Final Gravity (FG) = 1.01 = 2 input(s) provided
Calculate ABV
ABV
5.25 = 5.25%
Calculate ABW
ABW
4.2 = 4.2%
Calculate Apparent Attenuation
Apparent Attenuation
80 = 80%

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