A cocktail dilution calculator estimates how much water your drink gains during stirring or shaking, then recalculates the final ABV and proof. Dilution is what transforms raw spirits into a balanced, drinkable cocktail.
Cocktail Parameters
Weighted average of all spirits (e.g. a Manhattan is ~30-35%)
Dilution Results
Adjust parameters and click Calculate
How to Use the Cocktail Dilution Calculator
Understanding cocktail dilution is what separates professional bartenders from home mixologists. Every classic cocktail is designed to be diluted — the recipe ABV drops from 30-40% to a final 15-20% after stirring or shaking. This calculator shows you exactly how much water your drink gains.
Step 1: Enter starting volume and ABV
The drink volume is the total spirit + vermouth + other liquids before adding ice. For a classic Martini (2.5 oz gin at 40% ABV + 0.5 oz vermouth at 18% ABV), the starting ABV is about 35%. Enter that as your starting ABV.
Step 2: Choose method and ice type
Stirred drinks (Martini, Manhattan, Negroni) use cubed or large-format ice with a gentle rotational motion. Shaken drinks (Daiquiri, Margarita, Whiskey Sour) use more vigorous action that chills faster and adds slightly more water. Large ice spheres melt the slowest — ideal for spirit-forward drinks where you want precise dilution control.
Step 3: Interpret the results
A well-balanced classic cocktail lands at 15-22% final ABV. Below 12% feels watery. Above 25% is still too spirit-forward and needs more dilution. Use these results to adjust your technique — stir longer if it needs more dilution, or switch to large-format ice to slow it down.
FAQ
How much does shaking dilute a cocktail?
Shaking adds approximately 20-25% of the total drink volume as water. A 3-oz cocktail shaken for 12 seconds over cubed ice gains about 0.6-0.75 oz of water. The vigorous action and air incorporation accelerates ice melt compared to stirring.
How much does stirring dilute a cocktail?
Stirring adds approximately 15-20% of drink volume as water. Stirring is gentler, so the dilution rate is lower than shaking. A well-stirred Manhattan or Martini gains about 0.5 oz of water over 30-45 seconds of stirring.
Is this calculator free?
Yes, completely free with no signup required.
Why does dilution matter in cocktails?
Dilution isn't a flaw — it is essential. It lowers ABV to a palatable level, melts ice chips that carry flavor, brings out aroma compounds, and integrates the flavors. An undiluted stirred cocktail is too harsh; over-diluted, it is watery and weak. Most classic cocktails target 15-20% final ABV after dilution.
What is the difference between cubed, cracked, and large format ice?
Cracked and crushed ice melts faster due to more surface area, adding more dilution. Standard 1-inch cubes melt at a moderate rate. Large-format ice (2-inch cubes, spheres) melts slowest and adds the least dilution — ideal for spirits served neat or in a rocks glass where you want slow, controlled dilution.