Micrograms per cubic millimeter to grams per liter converter on this page calculates how many grams per liter are in 'X' micrograms per cubic millimeter (where 'X' is the number of micrograms per cubic millimeter to convert to grams per liter). In order to convert a value from micrograms per cubic millimeter to grams per liter (from μg/mm³ to g/L) just type the number of μg/mm³ to be converted to g/L and then click on the 'convert' button.