ABV Calculator 2026 — Alcohol By Volume from OG & FG ★★★★☆
🍺 ABV Calculator 2026 — Original & Final Gravity to Alcohol %
Your ABV Calculation (2026)
ABV:—
—
Gravity Points (OG − FG):—
Alcohol per Batch:—
Standard Drinks per Serve:—
Est. Calories per Serve:—
Category:—
⚠️ Formula accurate up to ~10% ABV. Higher-gravity beers may require a more complex equation. Not for medical or legal use.
📌 Quick Answer: ABV = (OG − FG) × 131.25. For OG 1.060 and FG 1.015: (1.060 − 1.015) × 131.25 = 5.91% ABV. One US standard drink contains 0.6 fl oz of pure alcohol — roughly 12 oz of 5% beer .
📋 Key Takeaways — ABV 2026
Formula: ABV = (OG − FG) × 131.25
OG = Original Gravity, FG = Final Gravity
1 US standard drink = 0.6 fl oz pure alcohol
5% beer = ~150 calories per 12 oz
10% beer = ~300 calories per 12 oz
Formula accurate up to ~10% ABV
ℹ️ This ABV calculator uses the standard homebrewing formula (OG − FG) × 131.25, accurate for most beers up to about 10% ABV .
📊 Formula: ABV = (OG − FG) × 131.25 | Standard drinks = (ABV × volume) ÷ 0.6 fl oz
💡 Important: For high-gravity beers (>10% ABV), the linear 131.25 formula underestimates ABV. Use a more complex formula or lab analysis.
📊 ABV Reference Table (Common Beverages)
Beverage
Typical ABV
Standard Drinks (12 oz)
Calories (12 oz)
Light Beer
4.2%
1.0
~103
Regular Beer
5.0%
1.0
~153
IPA
6.5%
1.3
~200
Wine
12%
2.4
~360 (5 oz)
Spirits
40%
1.0 (1.5 oz)
~97 (1.5 oz)
🍺 Example 1: Standard IPA
OG: 1.060 | FG: 1.015
ABV: (1.060 − 1.015) × 131.25 = 5.91%
Std Drinks (12 oz): 1.2
Calories (12 oz): ~180
🍺 Example 2: Strong Stout
OG: 1.080 | FG: 1.020
ABV: (1.080 − 1.020) × 131.25 = 7.88%
Std Drinks (12 oz): 1.6
Calories (12 oz): ~240
What Is ABV?
ABV stands for Alcohol By Volume — the percentage of alcohol in a beverage. A 5% ABV beer contains 5 milliliters of pure alcohol per 100 milliliters of liquid. It is the standard measure used worldwide for beer, wine, and spirits .
In homebrewing and commercial brewing, ABV is calculated from the difference between original gravity (OG) and final gravity (FG). OG measures the sugar content before fermentation, and FG measures what remains after yeast converts sugar to alcohol .
How the ABV Formula Works
The standard homebrewing formula is :
ABV = (OG − FG) × 131.25
For example, if OG is 1.060 and FG is 1.015:
Gravity points dropped = 1.060 − 1.015 = 0.045
ABV = 0.045 × 131.25 = 5.91%
The constant 131.25 approximates the density of ethanol relative to water and the gravity points per unit of alcohol. It is accurate for most beers up to about 10% ABV .
Standard Drinks: A Health Reference
A US standard drink contains 0.6 fluid ounces (14 grams) of pure alcohol . That equals :
12 oz of 5% beer
5 oz of 12% wine
1.5 oz of 40% spirits
Knowing your drink's ABV lets you calculate standard drinks per serving — useful for tracking consumption and understanding health guidelines. The US Dietary Guidelines recommend no more than 2 drinks per day for men and 1 per day for women.
ABV and Calories
Alcohol contains about 7 calories per gram — more than carbohydrates (4 cal/g) or protein (4 cal/g). Higher-ABV drinks have more calories from alcohol alone. A 5% beer and a 10% beer of the same volume differ by roughly 35–40 calories .
This calculator estimates calories per serving based on ABV and serve size. It is an approximation, not a lab measurement.
Limitations of the 131.25 Formula
The linear formula underestimates ABV for high-gravity beers (above ~10% ABV). For those, brewers often use a more complex equation or send a sample for lab analysis. If your OG is above 1.090, treat the calculated ABV as a rough estimate .
This calculator is for educational and homebrewing use. It is not a substitute for professional lab analysis or medical guidance.
🍺 Quick Reference — ABV 2026
Factor
2026 Detail
ABV formula
(OG − FG) × 131.25
Standard drink
0.6 fl oz pure alcohol
Calories per gram
7 (alcohol)
Formula limit
Accurate up to ~10% ABV
High-gravity beers
Need complex formula or lab test
❓ Frequently Asked Questions
What is ABV?
ABV stands for Alcohol By Volume. It expresses the percentage of alcohol in a beverage. A 5% ABV beer contains 5 milliliters of pure alcohol per 100 milliliters of liquid .
How do you calculate ABV from OG and FG?
The standard formula is ABV = (OG − FG) × 131.25, where OG is original gravity and FG is final gravity. For example, OG 1.060 and FG 1.015 gives (1.060 − 1.015) × 131.25 = 5.91% ABV .
What is a standard drink in the US?
A US standard drink contains 0.6 fluid ounces (14 grams) of pure alcohol. That equals 12 oz of 5% beer, 5 oz of 12% wine, or 1.5 oz of 40% spirits .
Why is the 131.25 constant used?
The 131.25 constant approximates the density of ethanol relative to water and the gravity points per unit of alcohol. It is accurate for most beers up to about 10% ABV; higher-gravity beers may need a more complex formula .
Does ABV affect calories?
Yes. Alcohol contains about 7 calories per gram, so higher-ABV drinks have more calories from alcohol. A 5% beer and a 10% beer of the same volume differ by roughly 35–40 calories .
💡 Expert Tips for ABV
Tip #1: Take gravity readings at the right temperature. Hydrometers are calibrated for 60°F (15°C); hotter or colder samples will read inaccurately.
Tip #2: Sanitize your hydrometer and test jar before each reading. Contamination can spoil the batch.
Tip #3: For high-gravity beers, use the alternate formula: ABV = (76.08 × (OG − FG) / (1.775 − OG)) × (FG / 0.794) — more accurate above 10% ABV.
Tip #4: Track standard drinks if you're monitoring consumption. A 9% DIPA is nearly 2 standard drinks per 12 oz.
Tip #5: ABV and IBU (bitterness) are different scales. Don't confuse them when reading beer labels.
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🛡️ CDCalculators ABV calculator 2026 — data sources: standard homebrewing formula (OG − FG) × 131.25, US standard drink definition. Last updated October 24, 2026. Disclaimer: Educational estimate only. Formula accurate up to ~10% ABV. Not for medical, legal, or commercial labeling use.