How Many Cups in a Liter?

A liter or a quart: what the gap is worth

A liter is a little more than a quart, and the little is worth knowing once: 53.65 mL, or about 3⅔ tablespoons. Four cups is 946.35 mL, so a 1-liter carton of stock covers an American soup recipe that says 4 cups with that much left over. I'd pour in the lot and stop thinking about it.

Now reverse the situation. A European recipe says 1 liter and you've got a US quart. You're short by the same 3⅔ tablespoons, and for a soup or a braise a splash of water closes the gap. Where the liquid has to be absorbed rather than simmered off, as in a pilaf or a bread dough, I'd add the missing amount properly: 3 tablespoons and 2 teaspoons gets you there.

Half a liter, a 250 mL carton and a bottle of wine

Half a liter is 2.11 cups, or 2 cups plus about 2 tablespoons. A 250 mL carton is 1.06 cups, so a cup plus a tablespoon gets you within a hair. A 750 mL bottle comes to 3.17 cups, a little more than 3, and if a braise asks for one bottle of wine I'd simply empty it into the pot, since a recipe that says "one bottle" is not asking you to be precise.

The smaller sizes are where the fractions turn annoying. A 330 mL can is 1.39 cups, and 200 mL is 0.85. The last column of the table gives a route for each, within about 1%, but ¾ cup plus 1½ tablespoons is three scoops to match a carton you could have poured. That's the moment to stop translating and find a measure that reads milliliters. If you do want the cups, enter the package size in mL above and the plan comes back with its percentage off, which tells you whether the approximation is worth caring about.

Deciliters and centiliters

If a recipe writes dL or cL, turn it into milliliters first. One deciliter is 100 mL and one centiliter is 10 mL, so 2 dL is 200 mL and 15 cL is 150 mL. From there the table will take you to cups, or the conversion calculator will. It accepts mL and L and has no setting for the other two, so that first step is yours.

Should you convert a European recipe to cups at all?

For liquids, I think it's fine and often unnecessary. If your glass measuring cup has a mL scale printed on the far side, read that and skip the math. Dry ingredients given in grams are another matter: turning 250 g of flour into a volume means trusting a scoop to reproduce what the recipe's author weighed. The cups to grams converter is there for the opposite direction, when a recipe is in cups and you'd rather have grams.

The worst option is a half-translated recipe, with some lines rounded to cups and others left in metric. Each rounding is tiny, but they don't all lean the same way, and the proportions the author worked out start to drift. Pick one system per recipe and stay in it. For the question of which milliliter figure a cup should be, see how many mL are in a cup.