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