Enter your original and final gravity readings to estimate ABV and apparent attenuation.
Estimated ABV
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Enter the OG and FG readings from your batch to estimate alcohol and fermentation performance.
Tap an example to prefill the calculator with sample values.
Session pale ale
1.048 OG down to 1.010 FG
A lighter-strength batch where a clean finish keeps the ABV modest but still clearly above a lawnmower lager.
Result: A crisp everyday-strength beer with healthy attenuation and a straightforward hydrometer story.
Classic IPA
1.062 OG down to 1.014 FG
A common homebrew-strength target where attenuation and ABV both land in a familiar craft-beer range.
Result: A standard-strength ale where the gravity drop translates to a solid mid-6% ABV result.
Big stout finish
1.090 OG down to 1.018 FG
A higher-gravity batch that still leaves more body behind, so the apparent attenuation matters as much as the ABV headline.
Result: The alcohol climbs quickly, but the fuller finish still shows up clearly in the attenuation result.