**To convert milligrams (mg) to milliliters (ml), the number of milligrams must be multiplied by the density of the liquid, which equals the volume in liters,and then divided by 1,000 to convert liters to milliliters.** The density of each liquid is unique.

The density for acetic acid is 1.049. To find out how many milliliters of standard acetic acid could be made with 10 milligrams of acetic acid, 10 milligrams must be multiplied by the density (1.049), which equals 10.49 liters. To convert this number from liters to milliliters, 10.49 is divided by 1,000, because there are 1,000 milliliters per liter. Thus, 10 milligrams of acetic acid could make a stock solution of 0.01049 milliliters of acetic acid.