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