* Milliliters (ml) measure volume, which is the amount of space a substance occupies.
* Milligrams (mg) measure mass, which is the amount of matter in a substance.
To convert between volume and mass, you need to know the density of the substance. Density is the mass per unit volume.
Here's how to think about it:
* Imagine you have 3 ml of water. Water has a density of approximately 1 gram per milliliter (g/ml).
* Since 1 gram equals 1000 milligrams, you can calculate that 3 ml of water weighs approximately 3000 mg (3 ml x 1 g/ml x 1000 mg/g = 3000 mg).
However, if you're dealing with a substance other than water, you'll need to know its density to make the conversion.
