How many mls equals 62.5 mg?

To convert milligrams (mg) to milliliters (ml), you need to know the density of the substance being measured, as the conversion depends on that. For example, if you are measuring water (with a density of 1 g/ml), 62.5 mg would equal 0.0625 ml. However, for other substances, the conversion will vary based on their specific density.