Convert a measure

One measure in the other system of units, and the tool that pours it. The arithmetic is the site's own - the ounce every recipe is converted with, and the sizes the measures reference prints - so the number here and the number beside a recipe are never two opinions about the same pour.

Written the way a recipe writes one: 1 1/2 oz, 50 ml, a quarter of a litre, 2 dashes. A measure has no size to convert only when the amount is not a number at all - the answer below says which of those it is instead of inventing one.

Clear This answer is one measure; the reference has the tools.

1 1/2 oz is 44 ml

Jigger

One small side (25 ml) of a standard jigger, plus about four teaspoons.

The same sentence appears beside the measure on any recipe printed in Millilitres (UK), at the number it names.

The sizes the reference prints

The tools themselves →

One click from an answer: each size as the measures page writes it, asked in the other system, with the tool that holds it. A size already written in the units you are reading it in is not converted here - a jigger is made to those two sizes, and the reference says what the difference between them is.