ABV Calculator (Brewing)
Alcohol by volume from OG and FG readings
Alcohol by Volume (ABV)
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📚 Learn more — how it works, FAQ & guide Click to expand
Learn more — how it works, FAQ & guide
Click to expand
ABV calculator for home brewers
Calculate alcohol by volume from OG + FG readings. Beer, cider, wine, mead.
How to use this tool
- 1
Record Original Gravity
OG before fermentation (e.g., 1.055).
- 2
Record Final Gravity
FG after fermentation complete (e.g., 1.012).
- 3
See ABV
Alcohol by volume percentage + attenuation.
Frequently Asked Questions
Which formula is used?
Two options: simple (ABV = (OG - FG) × 131.25) and accurate (Alternative formula good up to 12% ABV).
Typical gravities
OG: Light beer 1.035-1.045, IPA 1.055-1.075, imperial 1.080+. FG: Dry beer 1.005-1.010, sweet 1.015+.
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