Homebrew ABV Calculator
Enter your original and final gravity readings to estimate your beer's alcohol content and apparent attenuation.
What do OG, FG and attenuation mean?
Original Gravity (OG) is the wort's specific gravity before fermentation. Final Gravity (FG) is the reading after fermentation has finished. Their difference gives an estimate of alcohol by volume (ABV). Apparent attenuation indicates the percentage reduction in gravity points during fermentation; it is not the exact percentage of sugar consumed.
Check that your gravity readings are stable over at least two days before bottling. A calculator cannot confirm that fermentation has finished.
Please note: This calculator provides an estimated alcohol content. For accurate results, make sure your hydrometer readings are taken at the correct temperature, or adjusted accordingly.
