🍸 Cocktail Recipe Scaler Calculator
Many classic cocktails are built from simple part ratios (a Negroni is 1:1:1). Enter your ratio and desired total batch volume to see exact amounts of each ingredient.
Parts to millilitres
The tool adds up the parts you type and shares the total volume between them:
per part = total volume / sum of all parts
ingredient n = part n × per partThe default 1,1,1 into 750 ml gives 250 ml each. Parts can be decimals, so a daiquiri at 2,1,0.75 into 750 ml puts the sum at 3.75, making each part 200 ml: 400 ml rum, 200 ml lime, 150 ml syrup. Divide by 30 for ounces.
| Drink | Parts | Order |
|---|---|---|
| Negroni | 1,1,1 | gin, Campari, sweet vermouth |
| Margarita | 2,1,1 | tequila, lime, triple sec |
| Manhattan | 2,1 | rye, sweet vermouth |
| Martini | 5,1 | gin, dry vermouth |
| Daiquiri | 2,1,0.75 | rum, lime, simple syrup |
Batching means adding the water yourself
A cocktail made to order picks up 20-35% of its volume as melted ice. Scale the spirits alone and bottle them, and what you pour is markedly stronger and harsher than the same drink from a mixing glass - the water is a real ingredient, not a side effect.
Add it as an extra part. Stirring costs about 22% of the final volume, so 750 ml of Negroni becomes 750 / 0.78 = 962 ml, meaning 212 ml of water. That is 0.85 of a part next to the three you already have: enter 1,1,1,0.85 with a total of 962 ml and the fourth line is your water.
Frequently asked questions
How do I scale a cocktail recipe for a crowd?
Convert the recipe to parts, enter the volume you want, and multiply nothing by hand. A 750 ml bottle at 1,1,1 is five 150 ml Negronis once diluted.
Do I need to add water when batching cocktails?
Yes for anything normally stirred or shaken. Roughly 20-25% of the final volume for stirred drinks and 25-30% for shaken ones. Chill the bottle so no further ice is needed at service.
How many ml is one part in a cocktail?
Whatever you decide - a part is a proportion, not a unit. For single drinks people usually treat one part as 30 ml or 1 oz, so a 1,1,1 Negroni is 90 ml.