It is difficult to convert milligrams (mg) to milliliters (ml) (because they are two different units that are measured differently), although if certain information is provided, it is possible to solve using a proportion. It may be easier to use a calculator to convert mg to ml, which is commonly used when prescribing liquid medication and tablets. You could try using this online calculator which *should* hopefully help you answer any questions you come across pertaining to converting mg to ml.
www.eurobolic.com