1 ml = 1gr
One milliliter equals one gram for pure water. But normally, one unit volume of different liquids will weigh differently because of a variation in their densities. Therefore if you know the density of the substance, you can multiply mL by grams-per-milliliter. Xo, Smartiiz.
A millilitre is a unit of capacity. A gram is a unit of mass. Without some unit of density to compare, the two units are incompatible.
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You need to know the density of the material you are weighing, which is typically given in grams per milliliter. You then multiply the weight in grams of the object by its density to get its volume in milliliters.
For water: 1g = 1mL For anything else you need to know it's density to convert from mass to volume.
it depends of what you are mesuring, if it is water, the proportion is 1:1, 15ml of water is 15grams etc.
If the density of an alcoholic beverage is known, multiplying the volume (in milliliters) by the density in grams per milliliter produces the mass in grams. For water, the mass in grams will be the same as the volume in milliliters, because the density of water is 1 gram per milliliter. (That is, for pure water at sea level, at 4 degrees C)