Liters to Cups Converter

A litre is 4.23 US cups, not four — the gap that catches people scaling soups and batch recipes.

Conversion table

Volume	In US cups
0.5	2.1134 cups
1	4.2268 cups
1.5	6.3401 cups
2	8.4535 cups
2.5	10.5669 cups
3	12.6803 cups
4	16.907 cups
5	21.1338 cups
6	25.3605 cups
7	29.5873 cups
8	33.8141 cups
9	38.0408 cups
10	42.2676 cups
12	50.7211 cups
15	63.4014 cups

🥣 Big quantities at a glance

1 litre4.227 US cups
1 litre4 metric cups exactly
2 litres8.45 US cups
1 US cup236.59 mL

Scaling a recipe up

Above about half a litre, use a measuring jug rather than counting cups. Fewer measurements means fewer chances to lose count.
A litre is 4.23 US cups, not 4. Rounding down loses 53 mL per litre, which shows up as thick stock or dry rice.
If the recipe is Australian or from New Zealand, its cup is 250 mL, so four of them really are a litre.
For stocks and braises the difference is forgiving; for custards, gels and anything set with gelatine or agar, it is not.

Why a litre is not four cups

The US cup was defined as half a US pint, which makes it 236.588 millilitres, and everything above it in the American ladder divides cleanly: four cups to a quart, sixteen to a gallon. The litre came from a different system entirely and does not slot into that ladder at all, so it lands at 4.227 cups — awkward, and just close enough to four that people round it away. The metric cup of 250 mL was invented precisely to fix this: four of them make exactly one litre, which is why Australian and New Zealand recipes scale so much more comfortably.

Where the error actually shows

In small quantities a 5% error disappears into the seasoning. In batch cooking it does not, because it multiplies: a stock recipe scaled from four cups to four litres accumulates the same proportional gap over sixteen times the volume, and a rice or polenta ratio that is off by 5% is visibly wrong on the plate. The practical rule is to switch measuring tools as the quantity grows — cups and spoons below half a litre, a graduated jug above it, and a scale for anything where the ratio has to be right.

Daily water, translated into glasses

The familiar advice of eight 8 oz glasses is 1.9 litres, and it has no strong evidence behind it.
EFSA's reference values for total water intake are 2.0 litres a day for women and 2.5 for men, including water from food.
Food typically supplies 20–30% of that, so drinks account for around 1.5–2 litres.
A litre is 4.2 US cups, so 2 litres is about 8.5 cups.
Needs rise with heat, altitude and exercise, sometimes by a litre or more a day.
Thirst is a reasonable guide for healthy adults; fixed cup counts are a habit device, not a physiological rule.

Volumes for the pot

1 L = 4.227 US cups = 1,000 mL = 33.8 fl oz.
2 L = 8.45 US cups; 4 L = 16.9 cups, just over a US gallon.
A US quart is 4 cups and 946 mL — 5% less than a litre.
A 500 mL carton is 2.11 US cups.
An Australian cup of 250 mL means 4 cups = 1 L exactly.
A standard mug holds 300–350 mL, not one cup — mugs are not measures.

Worked examples

Stock, soup and punch

Two litres of stock

2,000 ÷ 236.588 = 8.45 US cups
Rounding to 8 cups would lose 106 mL
In a jug, simply fill to 2 L

2 L = 8.45 US cups

An American recipe calling for 6 cups

6 × 236.588 = 1,420 mL
So about 1.42 litres, not 1.5
With an Australian 250 mL cup it would be 1.5 L — a 6% difference

6 US cups = 1.42 L

Frequently Asked Questions

How many cups are in a litre?

4.227 US cups, because a US cup is 236.588 mL. If the recipe uses metric cups of 250 mL — standard in Australia and New Zealand — then a litre is exactly four cups, which is why those recipes scale so neatly.

Is 4 cups the same as 1 litre?

Only with metric cups. Four US cups make 946 mL, which is a US quart and 5% short of a litre. The difference is invisible in a stew and obvious in anything where a ratio matters, like rice, polenta or a set custard.

How many cups of water should I drink a day?

EFSA's reference values are 2.0 litres of total water a day for women and 2.5 for men, food included — roughly 8.5 and 10.5 US cups. Since food supplies a fifth to a third of that, drinks come to around 6 to 8 cups. The familiar eight glasses is a rule of thumb, not a finding.

Should I use cups or a jug for large quantities?

A jug above about half a litre. Every separate measurement is a chance to miscount, and a graduated jug replaces eight cup measurements with one reading. Cups remain useful below that, where a jug's markings are coarse.

How many cups is 250 mL?

1.057 US cups, or exactly one metric cup. This is the single most common conversion in international recipes, and the 6% gap is why an American cake made with Australian cups comes out slightly wet.

Is a mug the same as a cup?

No. A measuring cup is 236.588 mL, while a typical mug holds 300 to 350 mL and a large one more. Mugs are not calibrated at all, so using one as a measure introduces an error of a third before you have even started.