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Beer ABV Calculator

Alcohol by volume from gravity readings.

Estimate the alcohol-by-volume (ABV) of a homebrew from the original and final specific gravity readings using the standard 131.25 multiplier.

Daniel Oh By Daniel Oh
Published Last reviewed 1 min read

Inputs

Results

Enter values and click Calculate to see results.
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How to use this calculator

  1. Fill in the inputs above using the units you already have.
  2. Values update automatically as you type — no submit button needed.
  3. Hover any result row for the underlying formula and intermediate values.

Formula

ABV % = (OG − FG) × 131.25

In depth

Estimate the alcohol-by-volume (ABV) of a homebrew from the original and final specific gravity readings using the standard 131.25 multiplier.