Batch Cocktail Calculator

Why Batching Isn't Just Multiplication

When a cocktail is made to order, shaking or stirring it with ice does two jobs at once: it chills the drink and it adds water, diluting the spirits down to a drinkable strength. Multiply a recipe by 50 servings and pour it straight into a pitcher, and you skip that second job entirely — the batch comes out stronger and less balanced than the same drink made one glass at a time, because none of the ice-contact dilution ever happened. Professional batching accounts for this by adding water directly into the mix, so a make-ahead pitcher tastes like the drink it's replacing instead of a straight pour of concentrated spirit.

How to Use This Calculator

Enter your recipe as it's written for one serving — up to four ingredients, each with a name, an amount, and, for anything alcoholic, its ABV percentage (leave that at 0 for mixers, juice, or syrup). Set how many servings you're batching for and pick oz or ml. Choose whether the recipe is normally stirred (spirit-forward drinks like an Old Fashioned or Martini) or shaken (citrus- or egg-white-forward drinks like a Daiquiri or Whiskey Sour) — that sets a sensible default dilution percentage, which you can override if you're working from a different source or want to dial it in by taste.

How We Calculate Dilution and Final ABV

Each ingredient is scaled the same way: per-serving amount × number of servings. Dilution water is calculated as a percentage of the batch's total alcoholic volume, not the whole drink — professional bar guidance commonly cites roughly 20-25% for stirred, spirit-forward drinks and somewhat more for shaken, citrus-forward ones, since shaking incorporates extra water and air that stirring doesn't. If you tag ingredients with their ABV, the calculator also totals the pure alcohol across the batch and divides it by the final batch volume, including the dilution water, to estimate the finished drink's ABV — the same logic a bar uses to keep a batched cocktail consistent from the first glass to the last.

A Worked Example

Take a classic Old Fashioned: 2 oz bourbon (45% ABV), 0.25 oz simple syrup, and a dash of bitters (0.05 oz, effectively 0% ABV), batched for 12 servings, stirred style at the default 20% dilution. Scaled up: 24 oz bourbon, 3 oz simple syrup, 0.6 oz bitters. The alcoholic volume per serving is 2 oz, so dilution water is 2 × 20% = 0.4 oz per serving, or 4.8 oz for the full batch — bringing total batch volume to 32.4 oz. Total pure alcohol in the batch is 12 × (2 × 0.45) = 10.8 oz, so the finished batch sits at about 10.8 ÷ 32.4 ≈ 33% ABV, noticeably softer than the 45% bourbon it started from.

Where Batching Can Go Wrong

These dilution percentages are well-established starting points, not a lab-measured constant for your exact recipe — actual dilution depends on ice quality, how cold your ingredients already are, and how long the batch sits before serving, so taste and adjust before a big event rather than trusting the number blindly. The ABV estimate only accounts for ingredients you've tagged with a percentage; forgetting to enter ABV for a liqueur will understate the batch's real strength. And batching removes the dilution that happens per-glass at serving time — if you're pouring the batch over fresh ice rather than serving it up, that ice will add further dilution on top of what's already built in, so consider starting slightly under your target dilution percentage for drinks served on the rocks.