📊 Cocktail ABV Calculator
Enter the volume and alcohol percentage (ABV) of each ingredient to calculate the overall alcohol percentage of your finished drink.
Alcohol is summed, then divided by the whole drink
Each row contributes pure alcohol equal to its volume times its strength. The calculator adds those up and divides by the total liquid:
alcohol (oz) = Σ ( volume × ABV / 100 )
overall ABV % = alcohol (oz) / total volume (oz) × 100The page opens with 2 oz of 40% spirit and 4 oz of mixer: 0.8 oz of alcohol in 6 oz of liquid, so 13.3%. A stirred Negroni of 1 oz gin at 40%, 1 oz Campari at 24% and 1 oz sweet vermouth at 16% gives 0.40 + 0.24 + 0.16 = 0.80 oz in 3 oz, which is 26.7%. Volumes step in quarter ounces.
Dilution is an ingredient, and the tool will not add it for you
Stirring and shaking melt ice into the drink, and that water is part of what you serve. Enter it as its own row at 0% ABV or your answer will be too high.
- Stirred, 20-25% of the pre-dilution volume. That Negroni picks up about 0.7 oz of water, so 0.80 oz of alcohol now sits in 3.7 oz - the real strength in the glass is 21.6%, not 26.7%.
- Shaken, 25-30%. A hard shake on a 3 oz sour adds roughly 0.8 oz.
- Built over ice, 10% and rising - it keeps weakening in your hand.
Frequently asked questions
How do you calculate the ABV of a cocktail?
Multiply each ingredient's volume by its ABV, add those results, then divide by the finished volume including melted ice. Two ounces of 40% vodka in 6 oz of drink is 0.8 / 6, or 13.3%.
Does ice make a cocktail weaker?
Yes. Melting ice adds water and nothing else, so the alcohol is spread through more liquid. A stirred drink typically loses about a fifth of its strength before it reaches the glass.
What ABV should I enter for liqueurs?
Read the bottle - they vary far more than spirits. Triple sec runs 15-40%, sweet vermouth around 16%, Campari 24%, amaretto near 28%.