How to Calculate Cocktail ABV
A cocktail's alcohol content (ABV, Alcohol By Volume) is determined by the ABV and volume of each ingredient, as well as the dilution rate based on the mixing technique. This calculator uses formulas that professional bartenders rely on.
Dilution Rates by Technique
Shaken - 25~35% Dilution
Ingredients and ice are vigorously shaken in a cocktail shaker. This creates significant cooling and dilution. Used for Margarita, Cosmopolitan, Sidecar, and other citrus-forward cocktails.
Stirred - 20~25% Dilution
Ingredients are gently stirred with a bar spoon in a mixing glass. This creates gentler dilution than shaking. Ideal for spirit-forward cocktails like Martini, Manhattan, and Negroni.
Built On the Rocks - 10~15% Dilution
Ingredients are poured directly over ice in the serving glass. Dilution occurs gradually over time. Used for Old Fashioned, Mojito, Gin & Tonic, and similar drinks.
Neat - 0% Dilution
Served at room temperature without ice. No dilution occurs, preserving the original ABV. Typically used for sipping whiskey or cognac straight.
Blended - 30~40% Dilution
Ingredients and ice are blended together to create a slushy texture. This results in the highest dilution. Used for Piña Colada, Frozen Margarita, and other frozen cocktails.
Float - 0% Dilution
Spirits are carefully layered using density differences. Ingredients don't mix, so no dilution occurs. Used for layered cocktails like B-52 and Pousse-café.
Why Does Dilution Matter?
When ice is used in cocktails, it melts and adds water to the drink. This dilution doesn't just lower the ABV—it softens the alcohol's sharpness and allows the flavors to blend harmoniously. Proper dilution is essential for a well-balanced cocktail.