To convert cups to milliliters (cup to mL), multiply by 236.58824. 1 cup equals 236.58824 mL, about 67% of a soft-drink can.
| cups | milliliters |
|---|---|
| 1 cup | 236.58824 mL |
| 2 cups | 473.17647 mL |
| 5 cups | 1,182.9412 mL |
| 10 cups | 2,365.8824 mL |
| 25 cups | 5,914.7059 mL |
| 50 cups | 11,829.412 mL |
| 100 cups | 23,658.824 mL |
| 250 cups | 59,147.059 mL |
| 500 cups | 118,294.12 mL |
| 1000 cups | 236,588.24 mL |
The factor is 236.588, which is derived rather than defined, so any decimal you see has been rounded somewhere.
No simple round multiplier is close enough to be useful, so this is one to look up rather than estimate. The exact factor is 236.588.
Going the other way, one milliliter is 0.0042268 cup. Because the numbers get large quickly, a whole-number answer is almost always enough here: carrying decimals implies a precision your original measurement probably does not have.
To anchor the scale: 1 cup is about 237 mL.