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UnitCalculators.com

Litres to US cups

Multiply litres by 4.2268 to get US cups.

1 L = 4.2268 cupBIPM SI · NIST HB 44
L
8.4535cup

2 L = 8.4535 cup

How to convert litres to US cups

The US cup is a US customary cup, one sixteenth of a gallon (236.5882365 millilitres). The litre is a cubic decimetre (0.001 m³), the SI-accepted metric unit of volume.

Worked example — 2 L: 2 × 4.2268 = 8.4535 cup.

Litres to US cups table

Common conversions. The reverse table is on US cups to litres.
LitresUS cups
0.25 L1.0567 cup
0.5 L2.1134 cup
1 L4.2268 cup
1.5 L6.3401 cup
2 L8.4535 cup
3 L12.6803 cup
4 L16.907 cup
5 L21.1338 cup
10 L42.2675 cup

Reverse and related

About litres and US cups

Litre (L)

1 L = 4.2268 cup

Definition. A cubic decimetre (0.001 m³), the SI-accepted metric unit of volume

History and origin

The litre was introduced in France in 1795 as a unit of volume, defined as one cubic decimetre. It is not an SI base unit but is accepted for use with the SI.

Current use

Litres measure drinks and bottles, fuel and engine sizes across the metric world, and appear on beverage containers almost everywhere.

Source: BIPM SI Brochure (2019); the litre is an SI-accepted unit (1 L = 1 dm³)

US cup (cup)

1 cup = 0.236588 L

Definition. A US customary cup, one sixteenth of a gallon (236.5882365 millilitres)

History and origin

The US customary cup was standardised as a cooking measure at one sixteenth of a gallon, about 237 millilitres. It became popular through American recipe books in the nineteenth and twentieth centuries.

Current use

The cup is the dominant volume measure in US home cooking and baking; metric recipes usually give millilitres or grams instead.

Source: NIST Handbook 44, Appendix C §2 (U.S. Customary Units) and §5 (Tables of Equivalents)

Where people use this

Litres: drinks and bottles, fuel, engine sizes. US cups: recipes, baking. 1 litre is about 4.23 US cups.

How we know this is right
The factor is fixed by the standards that define the units, not chosen — so it is exact, not a measurement:
1 cup = 0.2365882365 L, so 1 L = 1 ÷ 0.2365882365 = 4.2268 cup.

Every value is carried to full double precision; the display is rounded.

Sources: NIST Handbook 44, Appendix C §2 (U.S. Customary Units) and §5 (Tables of Equivalents); BIPM SI Brochure (2019); the litre is an SI-accepted unit (1 L = 1 dm³).

Questions people ask

How many cups is 1 litre?

One litre is about 4.23 US cups. To convert litres to cups, multiply by 4.2268.

How many cups is 2 litres?

2 litres is about 8.45 cups.

How many cups is half a litre?

Half a litre is about 2.11 cups.

All litre conversions