ABV & Attenuation Calculator

Calculate alcohol content, attenuation, and calories for your homebrew.

1) Enter Your Beer Data

Original Gravity (OG)

Final Gravity (FG)

Batch Size (optional)

Units

Force high-accuracy ABV formula (auto-applied above 7%)

Beer Style Presets

Tip: take both gravity readings at the same temperature and calibrate your hydrometer.

2) Calculation Results

ABV

—

Alcohol by Volume

Apparent Attenuation

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% sugars consumed

Real Attenuation

—

% actual fermentation

Calories per 12 oz

—

total calories

Total Alcohol

—

Total Calories

—

ABW

—

Enter OG and FG to see calculations.

FG must be lower than OG.

ABV: alcohol by volume. Apparent attenuation: what your hydrometer reads. Real attenuation: accounts for alcohol's lower density. ABW: alcohol by weight.