Cocktail/Drink Batch

How Cocktail Batch Scaling Works

A cocktail batch scales a single-serving recipe up to any number of servings, while keeping every ingredient in exactly the same ratio. Enter your ingredients at their single-serving amount, along with your original and desired servings, and this calculator finds the scaled amount of each.

The Formula

$$\vC{\text{Scale Factor}} = \frac{\vB{\text{Desired Servings}}}{\vA{\text{Original Servings}}}$$ $$\vD{\text{Scaled Amount}} = \text{Amount} \times \vC{\text{Scale Factor}}$$

every ingredient is multiplied by the same scale factor, so the ratio between ingredients stays unchanged.

Worked Example

An Old Fashioned (1 serving: 2 oz bourbon) scaled up to 12 servings:

1. $\vC{\text{Scale Factor}} = \frac{\vB{12}}{\vA{1}} = \vC{12}$.
2. $\vD{\text{Scaled Amount}} = 2 \times \vC{12} = \vD{24}$ oz bourbon total.

Key Factors to Consider

• Dilution from ice doesn’t scale the same way as the other ingredients. A shaken or stirred cocktail typically gets a meaningful amount of its final volume from ice melt during mixing — batching a large-format pitcher means accounting for dilution separately (often by adding a portion of water directly) rather than assuming each serving dilutes exactly like a single shaken drink would.
• Carbonated ingredients should generally be added fresh per serving, not pre-batched. Soda water, tonic, and other carbonated mixers lose their fizz once mixed and left to sit — batch everything else in advance, but add carbonated components at serving time for a large-format cocktail.
• Citrus juice degrades in flavor faster than spirits do. Freshly squeezed citrus juice starts losing brightness within hours, so batching a large quantity well ahead of time can mean a noticeably flatter-tasting drink by the time it’s served — juice closer to serving time when possible.
• A large batch is easy to under- or over-estimate for a party’s actual serving count. Beyond the scaling math itself, consider how many drinks each guest is likely to have, not just the guest count, when deciding on a target number of servings to batch.

Useful to Know

Once a batch is scaled up, it’s worth rounding each ingredient to a measurement you can actually hit — an odd figure like 8.33 oz is hard to pour precisely, so rounding to the nearest 1/4 oz (or nearest whole dash for bitters) is standard practice, and the difference is negligible once spread across a full pitcher. It’s also worth batching the base spirit-and-modifier mixture separately from anything perishable: a bottle of pre-mixed Negroni or Old Fashioned base keeps well refrigerated for days, while a batch that already includes fresh citrus juice is best made only a few hours before serving.