Ounces per milliliter to grams per cup conversion calculator shown above calculates how many grams per cup are in 'X' ounces per milliliter (where 'X' is the number of ounces per milliliter to convert to grams per cup). In order to convert a value from ounces per milliliter to grams per cup (from oz/mL to g/cup) type the number of oz/mL to be converted to g/cup and then click on the 'convert' button.