SixtyTools
Explore tools
Guide · 7 min read · 18 Jul 2026

Millilitres to cups: a liquid conversion guide

The numbers, the cup-size problem, and when it actually matters.

Millilitres to cups is the conversion that separates a recipe that works from one that does not, especially when you are cooking from an international recipe. Unlike weight conversions, liquid volume seems like it should be simple — until you discover that a "cup" is a different size depending on where the recipe was written. This guide gives you the exact numbers, explains the cup-size problem, and covers the conversions people search for most.

Liquid measurements sit at the heart of cooking, from the splash of stock in a sauce to the precise millilitres of milk in a delicate batter. The trouble is that the humble cup, which feels like it should be a fixed amount, is actually a moving target that changes size from country to country. That single fact explains a lot of kitchen frustration, and knowing how to navigate it — when to trust a cup and when to reach for a marked jug — is what separates recipes that work reliably from ones that occasionally, mysteriously, do not.

The core numbers

The catch is that there is no single "cup". The common definitions are:

  • US customary cup: about 236.6 mL
  • US legal cup (used on nutrition labels): 240 mL
  • Metric cup (Australia, New Zealand, much of Europe): 250 mL
  • UK cup (largely historical): about 284 mL

For everyday cooking, most people treat a cup as roughly 240 mL, which is close to both the US legal cup and a convenient round number. But the metric cup is 250 mL, about 6% larger, and that difference matters in baking. A volume and liquid capacity converter lets you pick the cup standard so you are not guessing.

Common millilitre-to-cup conversions

Using the widely accepted 240 mL cup, here are the everyday figures:

  • 60 mL = ¼ cup
  • 120 mL = ½ cup
  • 180 mL = ¾ cup
  • 240 mL = 1 cup
  • 475 mL ≈ 2 cups
  • 500 mL ≈ 2 cups + 1 tablespoon (using the 240 mL cup)
  • 1,000 mL (1 litre) ≈ 4¼ cups

Notice that half a litre is not exactly two cups — it is a little over, because 500 divided by 240 is about 2.08. Small gaps like this are why converting precisely, rather than assuming round equivalences, keeps liquid-heavy recipes accurate.

Why the cup size varies

The cup grew up as a household measure rather than a scientific one, so different countries settled on slightly different sizes. The US kept a cup close to half a US pint; Australia and others rounded to a tidy 250 mL when they went metric; the old UK cup was larger still. None is more "correct" — they are regional conventions. The practical consequence is that an American recipe's "1 cup of milk" (about 237 mL) and an Australian recipe's "1 cup of milk" (250 mL) are genuinely different amounts, and following one with the other's cup introduces a small but real error.

When the difference matters

For a soup, a stew, or anything where you are adding liquid to taste, the cup-size difference is invisible — a few millilitres of stock changes nothing. For baking, it can matter, because the ratio of liquid to flour affects texture. A cake that wants a US cup of milk but gets a metric cup receives about 6% more liquid, which across several cups can leave a batter looser than intended. When precision counts, measuring liquids in millilitres directly — with a marked jug — sidesteps the whole cup-size question.

Tablespoons, teaspoons and fluid ounces

Below the cup, the smaller liquid measures are more standardised:

  • 1 tablespoon = 15 mL (US and metric)
  • 1 teaspoon = 5 mL
  • 1 US fluid ounce ≈ 29.6 mL
  • 1 cup = 16 tablespoons = 48 teaspoons

Fluid ounces add their own wrinkle: a US fluid ounce is about 29.6 mL, while a UK (imperial) fluid ounce is about 28.4 mL, and the imperial pint (20 fl oz) is larger than the US pint (16 fl oz). For recipes that use ounces and pints, checking whether they are US or imperial avoids a surprising gap.

Measuring liquids accurately

Technique matters as much as the number. Liquids should be measured in a clear jug placed on a flat surface and read at eye level, watching the bottom of the meniscus — the curved surface of the liquid. Measuring at an angle or holding the jug up to read it introduces easy errors of several millilitres. For small amounts, proper measuring spoons are more accurate than kitchen tablespoons, which vary. When a recipe is sensitive, a marked jug in millilitres beats cups because it removes the size ambiguity entirely.

Litres and larger quantities

For batch cooking and drinks, you will work in litres. One litre is 1,000 mL, a little over four US cups, and about four metric cups. A US quart (roughly 946 mL) is close to but not exactly a litre, which trips people up when scaling American recipes into metric jugs. For large volumes, converting the whole quantity at once — rather than counting cups — is both faster and more accurate, and a converter handles litres, millilitres, cups, pints, and quarts together.

Quick answers to common questions

How many ml in a cup? About 240 mL for the everyday US cup, but 250 mL for a metric cup.

Is 250ml one cup? It is one metric cup, but slightly more than a US cup (about 237 mL).

How many ml in a tablespoon? 15 mL, and a teaspoon is 5 mL.

How many cups in a litre? A little over four, since a litre is 1,000 mL.

The bottom line

A cup is roughly 240 mL, but "roughly" hides a real difference between US (237 mL) and metric (250 mL) cups that matters in baking. Use the everyday conversions for cooking, measure liquids in millilitres when precision counts, and check whether ounces and pints are US or imperial. When a recipe crosses borders, a converter that lets you choose the cup standard keeps your liquids honest.

Related tools

← All guides