Wine ABV Calculator – Calculate Alcohol Content in Homemade Wine
Measure the strength of your homemade wine with our Wine ABV Calculator. Use initial and final hydrometer gravity readings or Brix sugar levels to calculate ABV percentage — perfect for home winemakers and fermentation enthusiasts.
Typical range: 1.070 - 1.120
Typical range: 0.990 - 1.010
Results
Enter your gravity readings and click Calculate to see results
Understanding Wine ABV Calculation
Alcohol by Volume (ABV) is calculated by measuring the sugar content before and after fermentation. Yeast converts sugar to alcohol, causing the specific gravity to drop.
- Original Gravity (OG): Sugar content before fermentation
- Final Gravity (FG): Remaining sugar after fermentation
- Standard Formula: ABV = (OG - FG) × 131.25
- Brix: Alternative sugar measurement (degrees Brix)
Tip: Take readings at stable temperatures (60°F/15.5°C) for accuracy. Hydrometers are typically calibrated at this temperature.
How to Calculate Wine ABV
Take Initial Reading
Measure original gravity (OG) or Brix before fermentation begins.
Take Final Reading
Measure final gravity (FG) or Brix after fermentation completes.
Get ABV Results
See alcohol content, attenuation, and wine classification.
Key Features of This Wine ABV Calculator
**Dual Measurement Support**
Calculate from specific gravity or Brix readings based on your hydrometer.
**Accurate Formulas**
Uses standard (OG-FG)×131.25 and advanced formulas for precision.
**Attenuation Tracking**
Shows fermentation completeness to help diagnose stuck fermentations.
**Wine Classification**
Automatically categorizes your wine by alcohol level and sweetness.
Frequently Asked Questions
How is wine ABV calculated?
ABV = (Original Gravity - Final Gravity) × 131.25. For example, OG 1.090 and FG 0.990 gives (1.090-0.990)×131.25 = 13.1% ABV.
What is a normal ABV for wine?
Table wines: 11-14% ABV. Light wines: 9-11%. Fortified wines: 17-20%. Most commercial wines target 12.5-13.5% for balance.
What does final gravity tell me?
FG indicates fermentation completeness. Dry wines: 0.990-0.996. Sweet wines: 1.000+. FG above 1.000 may indicate stuck fermentation or residual sugar.
How do I convert Brix to gravity?
Approximate formula: SG = 1 + (Brix / 258.6). For accuracy, use: SG = 1 + (Brix / (258.6 - (Brix/258.2)×227.1)).
Why is temperature important for readings?
Hydrometers are calibrated at specific temperatures (usually 60°F/20°C). Readings at other temperatures need correction. Warm liquids read lower, cold liquids read higher.
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