Measures and measuring

Words by Simon Difford

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Measuring each ingredient accurately is essential to making consistently tasty cocktails so we present our recipes in ml, cl, and ounces. We've even developed our own Easy Jigger to make measuring each ingredient in either ml or ounces even easier.

Originally, cocktail recipes were in "gill", "quart" and "pony" measures, then fluid ounces (oz) became pretty much the standard global cocktail measure and remain the norm in North America. However, in the UK, Europe, Asia and much of the rest of the world, the ease and accuracy of measuring in millilitres (ml) has led to ounces becoming obsolete.

When fine-tuning the optimum proportion of one ingredient to another, while also pursuing a perfect fill level in the appropriate glass (wash-line), working in round ounces (30ml, or even half (15ml), quarter (7.5ml) or third-of-an-ounce (10ml) units is sometimes too restrictive. Working in millilitres makes measuring in smaller increments of 5ml (approx. 1/6oz) or even 2.5ml (approx. 1/12oz) easier to measure.

We round up 30ml to equal to 1oz (its actually 29.5735296ml) as this enables cocktail recipes in ounces to easily convert to millilitres. Conversely, some common measurements in ml aren't so easy to comprehend or measure in ounces. e.g. the standard legal UK spirits measure of 25ml equals an unfriendly five-sixths of an ounce, which if you're measuring in ounces is best measured in two goes:

25ml = 1 x 2/3oz measure + 1 x bar spoon (1/6oz) = 5/6oz

This is further complicated by those used to working with 25ml as the standard measure also thinking in fractions of that measure. Hence, 12.5ml is a common measure in European recipes but this converts to an unfathomable two-fifths of an ounce from an American perspective.

12.5ml = one x 1/4oz measure + 1 x bar spoon (1/6oz) = 2/5oz

The following table shows commonly used cocktail measures and their conversion from ml to oz. The green to red colour scheme indicates which measures convert easily and those which are more awkward in ounces.

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What's a dash, and how many drops in a dash?

A drop dispensed from the pipette is the smallest bartending measure and, after patiently dripping, counting, and measuring, I've found approx. 41 drops equal 1ml. How many drops equals a dash depends on what size you consider a dash to be, and that largely depends on your dasher – the same 1ml measure can be anything from 3 to 6 dashes (with Japanese bitters bottle dashers tending towards 6 dashes).

In the pursuit of consistency and accuracy I prefer to use bitters bottles with dropper pipettes (e.g. Bob's Bitters) or replace the dashers on brands of bitters bottles such as Angostura and Peychaud's with DashDarts screwtops. I then work to:
12 drops = 1 dash
4 dashes = 1.25ml

Easy Jigger

I'm sent recipes in ml and ounces with measured volumes (other than dashes) often as small as 1.25ml (1/24 oz or quarter a teaspoon). Over years of following and writing recipes, I dreamt of having an accurate jigger with graduations in both millilitres and ounces that started from 1.25ml / 1/24oz and ran all the way through the popular volumes to 60ml and 2oz. After a eureka moment with a plastic funnel, I told my friends at Bonzer about my idea and they produced what we call the Easy Jigger. I believe this is both the most accurate, easiest, quickest, and the most hygienic cocktail measure available.

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