Grams per cup to milligrams per deciliter conversion calculator above calculates how many milligrams per deciliter are in 'X' grams per cup (where 'X' is the number of grams per cup to convert to milligrams per deciliter). In order to convert a value from grams per cup to milligrams per deciliter (from g/cup to mg/dL) type the number of g/cup to be converted to mg/dL and then click on the 'convert' button.