ABV Calculator: Calculate Alcohol by Volume for Beer, Wine & Mead (UK 2026)
ABV Calculator – OG & FG Gravity
Enter your Original Gravity (OG) and Final Gravity (FG) to instantly get the alcohol by volume. Perfect for beer, wine, cider, mead, and any fermented beverage.
UK Alcohol Units Calculator (per serving)
Use the ABV result from above or enter a custom ABV% to calculate alcohol units based on drink volume (ml). UK unit = (Volume (ml) × ABV%) / 1000.
How to Calculate ABV: Formula & Gravity Explained
The Classic ABV Formula (UK Standard)
The most reliable method for beer, wine, and cider ABV uses Original Gravity (OG) and Final Gravity (FG). The simple formula is:
ABV (%) = (OG – FG) × 131.25
OG measures sugar density before fermentation; FG measures after fermentation. The difference shows how much sugar turned into alcohol. For accurate results, use a hydrometer calibrated at 20°C and apply temperature correction if needed (see our table below).
Original Gravity (OG) and Final Gravity (FG): Why They Matter
Whether you're brewing a stout, crafting a Sauvignon Blanc, or fermenting mead, gravity readings tell the story. Original Gravity (OG) represents the potential alcohol. Final Gravity (FG) indicates residual sweetness and final strength. Our abv gravity calculator works universally for all styles. In 2026, UK homebrewers increasingly rely on digital refractometers – but we provide both correction insights.
ABV Table: Common Beverage Styles & Gravity Ranges
| Beverage / Style | Typical OG | Typical FG | Estimated ABV |
|---|---|---|---|
| Light Lager (UK) | 1.038–1.044 | 1.006–1.010 | 3.5–4.5% |
| English Bitter | 1.040–1.048 | 1.008–1.012 | 3.8–4.8% |
| IPA (India Pale Ale) | 1.054–1.065 | 1.010–1.014 | 5.5–7.2% |
| Stout / Porter | 1.048–1.070 | 1.012–1.018 | 4.5–7.0% |
| Table Wine (White) | 1.085–1.095 | 0.990–0.996 | 11–13% |
| Mead (Traditional) | 1.090–1.120 | 1.000–1.010 | 10–14% |
| Cider (Dry) | 1.045–1.055 | 1.000–1.005 | 5–7% |
🌡️ Temperature Correction for Hydrometer (ABV Accuracy Tip)
Hydrometers are calibrated at 20°C (68°F). Warmer or cooler samples skew gravity readings. For every 5°C above calibration, add 0.001 to gravity. Our abv calculator with temperature helps, but you can apply a correction factor. For ultimate precision, use a refractometer and a correction calculator. In 2026, many UK craft brewers adopt dual-scale hydrometers.
Exclusive Pro Tip: High-Gravity & Advanced ABV Formula
For beers with OG >1.100 (barleywines, imperial stouts) use the Alternate Formula: ABV = (76.08 × (OG-FG) / (1.775-OG)) × (FG/0.794). Our standard calculator remains accurate within 0.2% for most homebrews, but advanced brewers can use this formula to get higher precision. We’ll add an advanced toggle soon – but our tool is 2026-ready.
Step-by-Step Guide: How to Use a Hydrometer & Calculate ABV
- Step 1: Sanitize hydrometer and test jar. Take OG reading just before pitching yeast. Record the value (e.g., 1.052).
- Step 2: After fermentation completes (stable gravity over 2-3 days), take FG reading. Note temperature, apply correction if needed.
- Step 3: Enter both values into our abv calculator above. Click "Calculate ABV".
- Step 4: Use the result for labelling, nutrition, or to track alcohol units.
For wine, mead, or cider, the same principle applies. Our wine abv calculator and mead abv calculator are built into this tool — no extra steps needed.
Brix & Refractometer Conversion for ABV
If you use a refractometer, you’ll read Brix. Use a Brix to ABV conversion after fermentation using a wort correction factor. Our abv calculator brix feature can be approximated by converting Brix to SG: SG = 1 + (Brix / (258.6 - (Brix/258.2)*227.1)). For advanced users, our recommendation: take both refractometer and hydrometer readings for best results.
Why UK Brewers & Home Winemakers Choose TotalCalcHub
We’ve updated our calculators for 2026 tax, excise duty, and UK guidelines. Our alcohol by volume abv calculator is used by hobbyists, microbreweries, and even students in brewing science. Plus the integrated alcohol units calculator aligns with NHS guidelines.
Frequently Asked Questions
We use the standard formula: ABV = (OG – FG) × 131.25. For high gravity, results are accurate within ±0.2% for homebrewing.
If you missed OG reading, approximate using estimated original gravity from recipe. Without OG/FG, ABV cannot be precisely determined. Always record both.
Our abv cocktail calculator uses the formula: Total alcohol = (volume₁ × ABV₁ + volume₂ × ABV₂ …) / total volume. For cocktails, use our dedicated “ABV adjustment” method – we recommend the same unit calculator above to compute overall strength.
Yes, gravity changes with temperature. If your hydrometer reading wasn’t at 20°C, apply a correction before entering OG/FG. Many online tools provide temperature correction tables.
A 568ml pint at 5% ABV = 2.84 units. Use our unit calculator for any volume & ABV.
Absolutely. Gravity-based calculation works regardless of grain bill or fruit used. Works perfectly for cider, mead, and gluten-free brews.
We refresh all tools for 2026, ensuring formulas align with current brewing best practices and UK regulations.