ABV Calculator

Calculate Alcohol By Volume for homebrewing. Estimate alcohol content from Original and Final Gravity readings.

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Brew with Precision

Did you make a light lager or a heavy stout? Our ABV Calculator is the essential tool for homebrewers and winemakers. By measuring the density of your liquid before fermentation (Original Gravity) and after (Final Gravity), you can calculate exactly how much sugar the yeast converted into alcohol. This standard formula (OG - FG) * 131.25 gives you the Alcohol By Volume percentage instantly.

Track Fermentation Health

Beyond just alcohol, this tool calculates "Attenuation"—the percentage of sugar consumed. This tells you if your yeast is healthy and if fermentation is truly finished. It also provides a rough estimate of calories per bottle. Whether you're brewing beer, cider, or mead, accurate gravity readings are the only way to ensure consistency and quality in your craft.

Brewer's Fact: The hydrometer, used to measure specific gravity, operates on Archimedes' principle of buoyancy. Sugar water is denser than plain water, so the float sits higher before fermentation!

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