Grams per cubic meter to milligrams per milliliter conversion calculator above calculates how many milligrams per milliliter are in 'X' grams per cubic meter (where 'X' is the number of grams per cubic meter to convert to milligrams per milliliter). In order to convert a value from grams per cubic meter to milligrams per milliliter (from g/m³ to mg/mL) just type the number of g/m³ to be converted to mg/mL and then click on the 'convert' button.