US cups to millilitres
One US cup is 236.5882365 millilitres.
1 US cup = 236.5882365 millilitres · 1 millilitre = 0.004226752838 US cups
This factor is exact, not rounded. It comes from the definition of the units rather than from a measurement, so the only limit on precision is how many digits are worth showing.
US cups to millilitres table
| US cups (cup) | Millilitres (ml) |
|---|---|
| 1 | 236.5882365 |
| 2 | 473.176473 |
| 3 | 709.7647095 |
| 5 | 1,182.941182 |
| 10 | 2,365.882365 |
| 20 | 4,731.76473 |
| 25 | 5,914.705912 |
| 50 | 11,829.41182 |
| 100 | 23,658.82365 |
| 500 | 118,294.1182 |
| 1,000 | 236,588.2365 |
How the conversion works
Multiply by 236.5882365 to go from US cups to millilitres, or by 0.004226752838 to go back the other way. Both figures are exact rather than rounded: they follow from the definitions of the units, not from anybody measuring something.
A US cup is 236.588 millilitres. A metric cup, used in Australia and New Zealand, is 250. A recipe that says 'cup' without saying which is assuming you know where it was written.