a millilitre = 1/1000 liter
A millilitre is 1 cubic centimetre. There are 1,000 millilitres in a litre.
Millilitre is a small measure of liquid volume. You might measure water for cooking ingredients in millilitres. You might measure the amount of juice in a carton in millilitres. You might measure the...
Grams are units of mass, millilitres are units of volume. You would need to know the density of the substance.
Multiply grams per decilitre by 1000 to get milligrams per decilitre.