How many cups are in 1 litre?

about 4.

a metric equivalent cup is 250 ml or 1/4 liter.

a US liquid cup is 237 ml, so there is 4. 22 cups per liter.

An imperial small cup is 227 ml so there is 4.4 cups per liter.

An imperial 1/2 pint cup is 283.5 ml so there is 3.53 cups per liter.