Cocktail ABV Calculator

Find the Alcohol Content of Your Mixed Drink

Cocktail ABV Formula

Formula

\[ ABV = \frac{\sum_{i=1}^{n} V_i \cdot abv_i}{\sum_{i=1}^{n} V_i + V_w} \times 100 \]

Where:

\(V_i\) — volume of ingredient \(i\) (ml)
\(abv_i\) — alcohol by volume of ingredient \(i\), as a decimal (e.g. 0.40 for 40% spirits)
\(V_w\) — extra water added by melted ice (ml)
\(n\) — number of ingredients (up to 5)

The numerator is the total volume of pure alcohol in the drink; the denominator is the final volume of the liquid, including meltwater from ice. Dividing one by the other gives the alcohol by volume of the finished cocktail.

Cocktail ABV – Calculation Example

Example: a vodka and juice made with 50 ml of 40% ABV vodka, 100 ml of orange juice, 50 ml of soda, and about 30 ml of water from melted ice.

\[ V_{alcohol} = 50 \times 0.40 + 100 \times 0 + 50 \times 0 = 20 \text{ ml} \]

\[ V_{final} = 50 + 100 + 50 + 30 = 230 \text{ ml} \]

\[ ABV = \frac{20}{230} \times 100 \approx 8.7\% \]

Result: the finished drink contains 20 ml (0.68 fl oz) of pure alcohol in 230 ml (7.8 fl oz) of liquid, giving a final strength of about 8.7% ABV — roughly 1.1 US standard drinks.

How to Use the Calculator

For each ingredient, enter its amount in the Volume field and choose ml or fl oz from the unit dropdown. You can mix units; the calculator converts everything for you.
Enter the ingredient's strength in the matching ABV field. Use 40% for most spirits, 0% for juice, soda, syrups and other non-alcoholic mixers. Liqueurs are typically 15–30%, fortified wines 15–20%, and wine 11–14%.
Leave unused ingredient rows at zero — they are ignored automatically.
Under Ice & Dilution, estimate how much water the ice will add as it melts. A good rule of thumb is 20–40% of the liquid volume for a shaken or stirred drink; enter 0 if the drink is served without ice.
Read the results: Total drink volume, Pure alcohol volume (also shown as US standard drinks) and Estimated final ABV.

What Does Cocktail ABV Mean?

Alcohol by volume (ABV) is the percentage of a drink's total volume that is pure ethanol. A bottle of gin labeled 40% ABV is 40% alcohol and 60% water and flavoring compounds. When you mix that gin into a cocktail, the mixers dilute the alcohol, so the finished drink has a much lower ABV than any single ingredient.

Cocktail ABV matters for several reasons. It tells you how strong a drink actually is, which is easy to misjudge: a large, easy-sipping long drink can contain as much alcohol as two shots of spirits. It helps with responsible pacing — a standard US drink contains about 14 g (roughly 17.7 ml) of pure alcohol, and health guidelines count drinks, not glasses. And for anyone designing or scaling recipes, knowing the final strength helps balance flavor against potency.

To interpret the result, compare it with familiar benchmarks: beer is typically 4–6% ABV, wine 11–14%, and undiluted spirits 35–50%. Most classic shaken or stirred cocktails land between 15% and 30% after dilution, while tall highball drinks with plenty of mixer often fall in the 5–10% range — similar to a strong beer.

Assumptions and Limitations

Volume additivity is assumed. In reality, mixing alcohol and water shrinks the total volume slightly (by a few percent), so the true ABV can be marginally higher than the calculated value. For practical purposes the difference is negligible.
Ice dilution must be estimated. How much ice melts depends on shaking or stirring time, ice temperature, and drink temperature. Use 20–40% of the liquid volume as a starting point: shaking a drink with plenty of ice for 10–15 seconds typically adds around 25–30% meltwater, while a drink left sitting on the rocks keeps diluting over time.
Check your labels. ABV varies by brand — vodkas and gins range from 37.5% to 50%, vermouths lose strength once opened, and premixed canned cocktails vary widely. Always enter the value from the actual bottle you are using.
The result is per whole drink. If the recipe makes two servings, either halve the volumes or divide the alcohol figures by two; the ABV itself stays the same.

Planning drinks for a party? Once you know the strength per glass, our Travel Budget and Parking Cost calculators can help with the rest of the evening's logistics — and if you are scaling up a recipe, the Ingredient Substitution calculator is handy when you are missing a component. Need to substitute a missing mixer? That same Ingredient Substitution tool covers common swaps.

Frequently Asked Questions

How do I calculate cocktail ABV by hand without a calculator?

Multiply each ingredient's volume by its ABV (as a decimal) and add the results to get total pure alcohol. Then add up all the liquid volumes, including dilution water. Divide alcohol by total volume and multiply by 100. Example: 60 ml of 45% gin contains 60 × 0.45 = 27 ml alcohol; mixed with 90 ml of tonic and 20 ml of meltwater, ABV = 27 / 170 × 100 ≈ 15.9%.

How is ABV different from proof?

Proof is simply ABV multiplied by a country-specific factor. In the US, proof is twice the ABV (80-proof vodka = 40% ABV); in the UK, proof is ABV × 7/4 (40% ≈ 70 UK proof). The calculator works with ABV, so divide US proof by 2 before entering it — never enter proof values directly, or your result will be double the true strength.

How many standard drinks are in my cocktail?

The calculator shows this automatically: one US standard drink contains about 14 g of pure alcohol, roughly 17.7 ml. So a Martini with 60 ml of 40% gin plus 10 ml of 16% vermouth holds about 25.6 ml of alcohol ≈ 1.4 standard drinks. Note that a UK unit is smaller (8 g), so the same drink counts as about 3.2 UK units — check which guideline applies to you.

Do I count non-alcoholic beer or wine as 0% ABV?

Often not exactly. Most "non-alcoholic" beers and wines legally contain up to 0.5% ABV, and some brands reach 1%. For one drink the effect is tiny, but if a recipe uses large amounts, enter the label value rather than 0. Truly 0.0% products exist too — check the bottle, since the difference matters for anyone avoiding alcohol entirely.

How do I scale a cocktail recipe up or down while keeping the same strength?

Keep all ingredient proportions identical and the ABV stays the same — including dilution. If you double every volume and double the estimated meltwater, the ratio of alcohol to total liquid is unchanged. Only the pure-alcohol volume and the number of standard drinks per serving change, so recalculate those when batching for a group.

What are the most common mistakes when calculating mixed-drink strength?

Three stand out: forgetting dilution, which overstates ABV in shaken or stirred drinks; guessing liqueur strength — triple sec, for instance, ranges from 15% to 40% by brand; and entering US proof instead of ABV. Also remember that ABV differs from alcohol by weight (ABW), used on some labels — 40% ABV is only about 31.8% ABW because alcohol is lighter than water.

Why does my cocktail feel stronger than its calculated ABV suggests?

ABV measures concentration, not total alcohol. A 500 ml punch at 8% ABV delivers about 40 ml of pure alcohol — two standard drinks — while a 100 ml Martini at 30% delivers roughly 30 ml. Drinking speed, carbonation, sugar, and whether you have eaten also affect how quickly you feel the effects, so pace yourself by standard drinks, not by ABV alone.