1 US cup = 240 ml exactly. This is the culinary standard used in US recipes. The precise customary cup is 236.588 ml, but all modern US recipes use 240 ml.
| US cup (240 ml) | Millilitre (ml) |
|---|---|
| 0.125 US cup | 30 ml |
| 0.25 US cup | 60 ml |
| 0.5 US cup | 120 ml |
| 0.75 US cup | 180 ml |
| 1 US cup | 240 ml |
| 1.5 US cup | 360 ml |
| 2 US cup | 480 ml |
| 3 US cup | 720 ml |
| 4 US cup | 960 ml |
| 8 US cup | 1920 ml |
The US cup is defined as 240 ml for all culinary purposes. This is slightly larger than the precise customary US cup (236.588 ml = 8 US fluid ounces) but has been the practical standard for American recipes since at least the early 20th century. All modern US recipe websites, cookbooks, and measuring cup sets use 240 ml.
Outside the US: Australia and Canada define the cup as 250 ml (the metric cup), while the UK has largely abandoned cup measurements in favour of grams and millilitres. Nordic countries use dl and ml. If you are adapting an Australian recipe, 1 cup = 250 ml, not 240 ml — a 4% difference that matters in precise baking.
For liquid ingredients, cups and millilitres are interchangeable in most cooking contexts. For dry ingredients, always prefer weighing in grams over measuring by volume, as packing density varies between brands and scooping methods.
In US cooking, yes — 1 cup = 240 ml by culinary convention. The precise customary US cup is 236.588 ml, but all modern US recipes use 240 ml.
2 cups = 480 ml.
The Australian and Canadian metric cup is 250 ml, not 240 ml. The US cup is 240 ml. This converter uses the US standard of 240 ml.