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