Cups in a Liter
There are about 4.23 US cups in 1 litre. A litre is 1000 ml and a US cup is 236.6 ml, so the answer is not a round number.
Convert between litres, millilitres and cups. The answer is deliberately not rounded to 4, because that error compounds quickly in baking.
Litre and cup chart
| Litres | Millilitres | US cups |
|---|---|---|
| 0.25 L | 250 ml | 1.06 cups |
| 0.5 L | 500 ml | 2.11 cups |
| 0.75 L | 750 ml | 3.17 cups |
| 1 L | 1000 ml | 4.23 cups |
| 1.5 L | 1500 ml | 6.34 cups |
| 2 L | 2000 ml | 8.45 cups |
| 3 L | 3000 ml | 12.68 cups |
| 5 L | 5000 ml | 21.13 cups |
Why the answer is not 4
A litre is 1000 ml. A US cup is 236.588 ml. Divide one by the other and you get 4.2268, not 4.
Rounding to 4 cups per litre introduces a 5.7 percent error. For a pot of soup that is invisible. For bread dough, a 5.7 percent shortfall in water is the difference between a workable dough and a dry one, and the error grows with every litre.
The reverse trips people up too. Four cups is 946 ml, which is a quart rather than a litre. US recipes that call for a quart are not calling for a litre, though the two are close enough that the substitution usually survives.
Metric cups make it cleaner
A metric cup is defined as exactly 250 ml, which means 4 metric cups make exactly 1 litre. Australian and New Zealand recipes generally use this cup, and the round number is why.
So the honest answer to how many cups are in a litre depends on which cup: 4.23 US cups, or exactly 4 metric cups. If a recipe comes from Australia and gives clean litre quantities, the metric cup is almost certainly what was meant.
Where litre and cup conversions come up
Recipe conversion is the common one, usually when a European or Australian recipe meets an American kitchen or the other way round.
Drink and hydration tracking uses it as well, since water intake is often quoted in litres but measured in cups or glasses.
Batch cooking and meal prep needs it when scaling a recipe up into a stockpot, where the difference between 4 and 4.23 cups per litre starts to add up.
Frequently asked questions
How many cups are in a liter?
About 4.23 US cups, or exactly 4 metric cups. A litre is 1000 ml, a US cup is 236.6 ml and a metric cup is 250 ml.
Is 4 cups the same as 1 liter?
Not quite. Four US cups is 946 ml, which is a quart. That is about 5 percent less than a litre.
How many ml in a cup?
236.6 ml for a US cup, 250 ml for a metric cup, and 284 ml for an old imperial UK cup.
How many cups in 2 liters?
About 8.45 US cups, or exactly 8 metric cups.