ABV Calculator
Calculate Alcohol by Volume from original and final gravity readings
Calculate Alcohol by Volume (ABV)
Gravity reading before fermentation
Gravity reading after fermentation
Advanced formula is more accurate for high gravity beers
For calculating total alcohol content and standard drinks
ABV Calculation Results
Method Used: Simple Formula
Original SG: 0.000
Final SG: 0.000
Original °Plato: 0.0°
Final °Plato: 0.0°
Simple ABV: 0.00%
Advanced ABV: 0.00%
Example Calculation
Typical Ale Fermentation
Original Gravity: 1.050 SG
Final Gravity: 1.010 SG
Batch Size: 20 liters
Calculation Results
Simple Formula: (1.050 - 1.010) × 131.25 = 5.25% ABV
Advanced Formula: More accurate result ≈ 5.21% ABV
Attenuation: ((1.050 - 1.010) / (1.050 - 1)) × 100 = 80%
Pure Alcohol: 20L × 5.25% × 0.789 = 0.83kg
Standard Drinks: 830g ÷ 14g = 59 drinks
Typical ABV Ranges
Light Beer
3.0-4.5% ABV
Session Ales
3.5-5.0% ABV
Standard Beer
4.5-6.0% ABV
Strong Beer
6.0-9.0% ABV
Barleywine
8.0-12.0% ABV
Wine
11.0-15.0% ABV
Gravity Scale Reference
Brewing Tips
Take readings at the same temperature
Use temperature correction if needed
Advanced formula is more accurate for high OG
Wait for fermentation to complete before FG reading
Sanitize hydrometer and sample jar
Understanding ABV Calculation
What is ABV?
Alcohol by Volume (ABV) is a standard measure of the volume of alcohol contained in an alcoholic beverage. It represents the percentage of the total volume that is pure ethanol at 20°C (68°F).
How ABV is Calculated
- •Measure original gravity before fermentation
- •Measure final gravity after fermentation
- •Apply formula to calculate alcohol content
- •Consider temperature corrections if needed
Calculation Formulas
Simple Formula:
ABV = (OG - FG) × 131.25
Advanced Formula:
ABV = (76.08 × (OG - FG) / (1.775 - OG)) × (FG / 0.794)
Attenuation:
= ((OG - FG) / (OG - 1)) × 100
Note: The advanced formula accounts for the non-linear relationship between gravity and alcohol content, providing more accurate results for high-gravity fermentations.