Convert Fluid Ounces to Milliliters (fl oz to ml)

This direction is for when you already have a volume in US fluid ounces — a US recipe measurement, a soda can, a cosmetics bottle — and need it in milliliters for a metric recipe, a non-US product comparison, or a form that expects milliliters.

Baking is the clearest trigger here too: a US recipe measuring liquids in cups needs converting to milliliters for anyone using a metric kitchen scale or measuring jug. One US cup is exactly 8 fl oz, which converts to 236.59 ml — not the same as a "metric cup," which is commonly rounded to 250 ml in some countries, so treating them as interchangeable introduces a small but real error in a precise recipe.

Drink and bottle sizes are the other common case: a standard US soda can is 12 fl oz (354.88 ml), a US pint is 16 fl oz (473.18 ml), and a large fountain drink might be 32 fl oz (946.35 ml) — figures worth knowing when comparing US beverage sizes against metric bottle sizes sold elsewhere.

Cosmetics and personal care sizes matter too: a 4 fl oz US travel bottle converts to about 118.3 ml, useful when checking it against an international carry-on liquid limit that's expressed in milliliters rather than fluid ounces.

Cocktail recipes are written in US fluid ounces and poured with a jigger, which is why the numbers look awkward in metric. The standard 1.5 fl oz pour is 44.36 ml, a half measure of 0.75 fl oz is 22.18 ml, and a 2 fl oz double is 59.15 ml. None of them land on the 25 ml and 35 ml measures that pubs in the UK and Ireland serve spirits in, so the same recipe built with metric barware comes out slightly different from the version poured US-style.