ANSWER
It is impossible, without additional information. "milliliter" is unit of volume and "milligram" is unit of weight. You need to know the density of substance.
For example, 1 liter of water weigh 1 kilogram, but 1 liter of gasoline weigh less then 1 kilogram
Directly there is no conversion.
However, mass (in milligrams) and volume (in millilitres) for a substance are related by density:
density = mass/volume = mg/ml
If, however, you are talking about medicine dosage, then the mg of the drug in the ml of the solution will depend upon the concentration of the drug (again in mg/ml).
There can be no conversion. A milligram is a measure of mass. A millilitre is a measure of volume. The two measure different things and, according to basic principles of dimensional analysis, conversion from one to the other is not valid. Consider a millilitre of air. How many milligrams? Next consider the same volume of water. How many milligrams? The masses of equal volumes of the two substances will clearly be very different.
You don't. Milligram is a measure of mass, milliliter of volum.
You cannot. Milligrams neasure mass, millilitres measure volume.
Does not convert; milligrams (mg) and grams (g) are measures of weight or mass and mL (milliliters) is a measure of volume.
Milliliters and milligrams are not equivalent unit types.
Milliliters can't be converted to milligrams. Milliliters measure volume, while milligrams measure mass.
Does not convert; one is a measure of weight and the other is a measure of volume.
Does not convert; milligrams (mg) and grams (g) are measures of weight or mass and mL (milliliters) is a measure of volume.
Milliliters does not convert to milligrams.
Milligrams and milliliters are two different measures, milligrams measure mass and milliliters measure volume and you can not convert one to the other.
Milligrams can't be converted to milliliters. Milligrams measure mass, while milliliters measure volume.
Milligrams and milliliters measure different things. For a specific substance, you can convert the milligrams to grams (dividing by 1000), then divide by the density of the substance (expressed in grams / milliliter), to get the volume (in milliliters).
Milligrams is a unit of mass. Milliliters is a unit of volume. To convert between these units you must know the density of the substance.Density = mass / volume.
It is important to know how to convert units throughout life. In 90 milligrams of substance there are 0.09 milliliters of substance.
Does not convert; milligrams (mg) and grams (g) are measures of weight or mass and mL (milliliters) is a measure of volume.
This is not a valid conversion; milligrams (mg) and grams (g) are measures of weight or mass and mL (milliliters) is a measure of volume.
Does not convert; milligrams (mg) and grams (g) are measures of weight or mass and mL (milliliters) is a measure of volume.
Does not convert; milligrams and grams are measures of weight and mL (milliliters) is a measure of volume.
Does not convert; milligrams (mg) and grams (g) are measures of weight or mass and mL (milliliters) is a measure of volume.
Does not convert; milligrams (mg) and grams (g) are measures of weight or mass and mL (milliliters) is a measure of volume.