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Millilitres to US cups

Multiply millilitres by 0.00422675 to get US cups.

1 mL = 0.00422675 cupBIPM SI · NIST HB 44
mL
0.845351cup

200 mL = 0.845351 cup

How to convert millilitres to US cups

The US cup is a US customary cup, one sixteenth of a gallon (236.5882365 millilitres). The millilitre is one thousandth of a litre, equal to one cubic centimetre (cm³).

Worked example — 200 mL: 200 × 0.00422675 = 0.845351 cup.

Millilitres to US cups table

Common conversions. The reverse table is on US cups to millilitres.
MillilitresUS cups
50 mL0.211338 cup
100 mL0.422675 cup
118 mL0.498757 cup
150 mL0.634013 cup
200 mL0.845351 cup
237 mL1.0017 cup
250 mL1.0567 cup
500 mL2.1134 cup
1,000 mL4.2268 cup

Reverse and related

About millilitres and US cups

Millilitre (mL)

1 mL = 0.00422675 cup

Definition. One thousandth of a litre, equal to one cubic centimetre (cm³)

History and origin

The millilitre is one thousandth of a litre, equal to one cubic centimetre. It came with the decimal metric system as the unit for small liquid volumes.

Current use

Millilitres are used for recipes, medicine doses and cosmetics, and are printed on most small bottles and cans.

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

US cup (cup)

1 cup = 236.5882 mL

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

Millilitres: recipes, medicine doses, cosmetics. US cups: recipes, baking. 237 mL is about 1 US cup.

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 = 236.5882365 mL, so 1 mL = 1 ÷ 236.5882365 = 0.00422675 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 mL is 1 cup?

One US cup is about 237 mL (236.6 mL). To convert mL to cups, divide by 237.

How many cups is 500 mL?

500 mL is about 2.1 US cups, and 250 mL is about 1.06 cups.

Is 250 mL one cup?

Close but not exact: 250 mL is about 1.06 US cups, while a US cup is 237 mL.

How many cups is 1000 mL?

1000 mL, which is one litre, is about 4.2 US cups.

How many mL is half a cup?

Half a US cup is about 118 mL, and a quarter cup is about 59 mL.

All millilitre conversions