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ABV & Attenuation

From your original and final gravity: alcohol by volume, apparent and real attenuation, real extract, and calories. Or work it backward — what final gravity do you need to hit a target ABV, a target attenuation, or where will your yeast's attenuation land this beer? A hydrometer temperature-correction helper is built in.

ABV ×2Accurate & simple
App + RealAttenuation
CaloriesPer 12 oz & 100 mL
Solve FGFrom a target
From measured gravities

Calculate the numbers

Enter original and final gravity. OG can be given in specific gravity, Plato, or Brix (pre-fermentation, so it's clean); FG in SG or Plato — a refractometer FG needs the alcohol correction first.

Original gravity
Final gravity
ABV & Attenuation · A brewer's calculator
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Standard relations · verified

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