Cocktail Batch Scaler
Enter one drink, choose how many you’re making, and get the full batch — including the water that melting ice would normally add.
Add at least one ingredient with an amount above zero to scale the batch.
Total batch
for drinks · each
- Base mix (no water)
- Water for dilution (%)
- Final batch volume
- Estimated batch ABV ABV. Alcohol by volume — the percentage of a drink that is pure alcohol.
Batching for a party — practical notes
About this calculator
A cocktail batch scaler takes a single-serve cocktail recipe — written for one drink in a mixing glass or shaker — and scales it up to a party batch in a punch bowl or pitcher, with the right dilution water added in so the final ABV and balance match a properly-shaken or -stirred individual drink.
The trick is dilution. When you shake a Manhattan over ice, you are not just chilling it; you are also melting roughly 25 percent of the drink's final volume as water. A pre-batched Manhattan that skips that step tastes harsh and too strong. The fix, popularised by Dave Arnold in *Liquid Intelligence*, is to add the dilution water deliberately before bottling: about 25 percent of the spirits volume for shaken drinks, 20 percent for stirred-with-ice, and zero for served-on-the-rocks (where the dilution happens in the glass).
This calculator handles that math: take a recipe, choose how many servings you want, pick the dilution method, and get a precise spirits-plus-water output that you can mix in advance, refrigerate (or freeze, for some), and pour straight from the bottle on the night.
The math: dilution, ABV, and ratios
Cocktail batching is a two-stage scale: ingredient scaling, then dilution.
Ingredient scaling is simple multiplication: per-drink quantity × number of drinks = batch quantity for that ingredient. So a Manhattan with 60 mL rye, 30 mL sweet vermouth, and 2 dashes (about 1 mL) of Angostura, scaled to 12 drinks, gives 720 mL rye, 360 mL vermouth, and 24 dashes (12 mL) of Angostura.
Dilution adds water to mimic ice-melt. Dave Arnold's published dilution percentages: shaken cocktails (Margarita, Daiquiri, Whiskey Sour) take ~25 percent of total volume; stirred-with-ice cocktails (Manhattan, Negroni, Martini) take ~20 percent; built-in-glass-on-rocks drinks (Old Fashioned, Negroni-on-rocks) take 0 percent because the dilution happens in the glass.
For the Manhattan example: spirits total 1,080 mL. At 20 percent dilution: 1,080 × 0.20 = 216 mL of water added. Final batch volume: 1,296 mL plus the bitters (rounding error). Estimated ABV: rye is ~40% ABV, vermouth ~16% ABV, so spirit-weighted alcohol = (720 × 0.40 + 360 × 0.16) ÷ 1,080 = 0.32 or 32% before dilution; after dilution to 1,296 mL the ABV drops to 720 × 0.40 + 360 × 0.16 = 345.6 mL pure alcohol in 1,296 mL = 26.7% ABV. That's typical for a properly-stirred Manhattan in the glass.
Standard pour sizes and dilution percentages
| Item | Standard | Notes |
|---|---|---|
| Spirit pour (single) | 1.5 fl oz / 44 mL | Standard North American pour |
| Spirit pour (double) | 3 fl oz / 89 mL | Double / "long" pour |
| Vermouth (per Manhattan) | 0.75–1 fl oz / 22–30 mL | Sweet or dry |
| Citrus juice (per sour) | 0.75–1 fl oz / 22–30 mL | Lemon, lime, grapefruit |
| Simple syrup (per sour) | 0.5–0.75 fl oz / 15–22 mL | 1:1 sugar:water |
| Bitters (per drink) | 1–3 dashes (~0.5–1.5 mL) | Angostura, Peychaud's, orange |
| Dilution: shaken | 25 % of total volume | Margarita, Daiquiri, Whiskey Sour |
| Dilution: stirred | 20 % of total volume | Manhattan, Negroni, Martini |
| Dilution: built on rocks | 0 % | Old Fashioned, Negroni-on-rocks |
| Typical Manhattan ABV | ~27 % | After 20 % dilution |
| Typical Negroni ABV | ~24 % | Equal-parts after dilution |
| Typical Margarita ABV | ~15 % | After 25 % dilution + lime/syrup |
Batching for a party — practical notes
Make ahead, refrigerate, do not freeze (usually). A pre-diluted shaken cocktail keeps three to seven days refrigerated and tastes better cold; the citrus dulls after a day or two so anything with fresh juice is best mixed within 24 hours. Stirred spirits-only cocktails (Negroni, Manhattan) keep a week or two refrigerated and improve slightly — some bartenders call this "meld."
Fizz cocktails (Mojito, Mule, Bellini) cannot be pre-batched with their fizz. Pre-mix the non-carbonated portion, then top with the fizz when pouring. Same with cocktails that need an egg white or aquafaba — those have to be shaken fresh per serving.
Garnish at service. Citrus peels oxidize quickly and lose their oils; mint wilts in liquid; cucumber slices get soggy. Cut the garnishes ahead and add them at the moment of pour. Cherries, olives, and dehydrated citrus wheels keep fine and can be staged ahead.
ABV math is approximate. The calculator's ABV reading assumes the labelled spirit ABV is exact, which it is to within ½ percent. Vermouth and other fortified wines vary more (15-18% is the typical range). For exact figures, use a hydrometer. For a party, the calculator's estimate is plenty accurate to gauge whether the batch will sneak up on guests (often) or not.
Batching cocktails — common questions
How do I scale a cocktail for a big batch?
Multiply every ingredient in a single drink by the number of drinks you want, then add water to stand in for the dilution that stirring or shaking with ice normally provides. This tool does both at once: enter one drink, set the batch size, pick how it’s mixed, and it returns each ingredient’s total plus the exact water to add so the batched drink tastes like a fresh one.
Why do I need to add water to a batched cocktail?
When you stir or shake a single drink over ice, some of that ice melts into the drink — usually adding 20–30% of its volume in water. That dilution is part of the recipe; it softens the alcohol and balances the flavours. If you batch ahead and serve without ice, you have to add that water in yourself, or the drink will taste harsh and over-strong.
How much dilution should I add?
A good rule of thumb is about 20–25% added water for a stirred drink (a Negroni or Old Fashioned) and 25–30% for a shaken one (a Margarita or Daiquiri), because shaking melts more ice. Drinks served over fresh ice need no pre-dilution, since the ice in the glass dilutes them as people sip. This tool uses those presets and lets you fine-tune the percentage.
How is the batch ABV calculated?
For each ingredient, the tool multiplies its volume by the alcohol percentage you enter to get its pure-alcohol content, adds those up across the whole batch, and divides by the final volume after the dilution water is added. A typical stirred or shaken cocktail lands around 18–24% ABV once diluted — noticeably gentler than the 30%+ of the undiluted pour. It’s an estimate, so always check your bottle labels.
What does “one part” mean in a cocktail recipe?
A “part” is a ratio, not a fixed measure — “2 parts gin to 1 part vermouth” keeps the same proportions whether a part is an ounce, 30 mL, or a whole cup. Choose the “part” unit and set what one part equals, and the calculator turns the ratio into real volumes for your batch. It’s handy when a recipe is written as a ratio rather than in ounces or millilitres.
Can I make the batch a day ahead?
Spirit-forward batches (Negroni, Manhattan, Old Fashioned) keep for days or even weeks refrigerated, because alcohol and sugar are good preservatives. Anything with fresh citrus is best mixed the same day, as lemon and lime juice turn dull and bitter within hours. A safe approach is to batch the spirits, vermouths, and syrups ahead, then stir in fresh citrus and any bubbles right before serving.
Reviewed 8 June 2026 · methodology cited