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