#### 4 Ways to Convert Milliliters (mL) to Grams (g) wikiHow

Multiply the density in kg/m 3 (kilograms per cubic meter) by to get the density in g/mL. Multiply the density in lb/gallon (pounds per gallon) by to get the density in g/mL. 3. Multiply the volume in milliliters by the density. Multiply the mL measurement of your substance by its density in g/mL.