How many cup in a liter of water?

If each cup is 250 milliliters (mL) then four cups is a liter (L).

These are the "exact" amounts:

In the United States, 1 liter is equal to 4.226 752 838 cups.

According to the metric system, 1 liter is equal to 4 cups.

In Canada and the United Kingdom, 1 liter is equal to 4.399 384 966 cups.