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