How Many Milligrams Are In A Milliliter?

Converting milligrams (mg) to milliliters (mL) is a common task when measuring and dispensing small quantities of medication. But how do you know how many milligrams are in a milliliter?
The answer depends on the density of the substance you are measuring. For example, water has a density of 1 gram per milliliter (g/mL), so 1 mL of water would contain 1 mg of weight. But different substances have different densities, so you can’t always use this method to convert mg to mL.
To accurately convert milligrams to milliliters, you will need to know the density of the substance you are measuring.