Milligrams per liter to kilograms per cubic meter conversion calculator shown above calculates how many kilograms per cubic meter are in 'X' milligrams per liter (where 'X' is the number of milligrams per liter to convert to kilograms per cubic meter). In order to convert a value from milligrams per liter to kilograms per cubic meter (from mg/L to kg/m³) just type the number of mg/L to be converted to kg/m³ and then click on the 'convert' button.