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