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Cocktail Ratio Calculator

Scale a drink recipe by servings or total volume and see parts converted to ml and oz.

Scale a drink recipe

Scale factor: —
Total volume: —
Estimated ABV: —
Ingredient parts are converted to millilitres and ounces. Please drink responsibly.

How to use the Cocktail Ratio Calculator

  1. List the ingredients as a name and a number of parts.
  2. Choose to scale by serve count or total volume.
  3. Set the spirit strength to see the ABV estimate.

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Frequently Asked Questions

Common questions about the free online cocktail ratio calculator.

Enter each ingredient as a name and a number of parts. The tool scales every part to reach your target serves or volume.
Put one ingredient per line as name, a vertical bar, then the number of parts, for example Gin, a bar, then 2.
A part is any equal unit. The tool treats one part as 60 millilitres, so two parts of gin means 120 millilitres of gin.
In serve mode it is your target number of serves. In volume mode it is the target volume divided by the base recipe volume.
Parts are multiplied by 60 millilitres and the scale factor, and ounces are that volume divided by 29.5735.
Named spirits are multiplied by the strength you enter, then divided by the total drink volume to give an approximate ABV.
Dilution, ice melt and mixers all add volume, so a stirred or shaken drink is usually weaker than the spirit alone suggests.
Yes. This tool is for planning drinks only, not medical advice, and you should follow your local alcohol guidance.

Last updated: October 10, 2026