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Calculate ABV from original and final gravity. Includes beer and wine style references.
ABV is a standard measure of the alcohol content in a beverage, expressed as a percentage of total volume. It tells you how much of the drink is pure alcohol.
| Style | OG | FG | ABV |
|---|---|---|---|
| Light Lager | 1.028–1.040 | 1.004–1.010 | 2.8–4.2% |
| Pale Ale | 1.044–1.060 | 1.008–1.014 | 4.4–5.4% |
| IPA | 1.056–1.075 | 1.008–1.016 | 5.5–7.5% |
| Stout | 1.036–1.075 | 1.007–1.020 | 4.0–6.5% |
| Belgian Tripel | 1.075–1.085 | 1.008–1.014 | 7.5–9.5% |
| Wine (Dry) | 1.080–1.100 | 0.990–1.000 | 11–14% |
Formula
Standard: ABV = (OG − FG) × 131.25 | Alternate: ABV = (76.08 × (OG − FG) / (1.775 − OG)) × (FG / 0.794)OG = Original Gravity (pre-fermentation gravity reading)
FG = Final Gravity (post-fermentation gravity reading)
Worked Example
OG = 1.050, FG = 1.010
Did you know? The 131.25 constant is derived from the density of ethanol and water — it's a simplification of a more complex thermodynamic equation used by commercial breweries.
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