# How Do You Convert Grams To Fluid Ounces?

There are two common measurements called ounces. One is the regular (Avoirdupois) ounce, which is a measure of weight equal to 28.35 grams. The other is the fluid ounce, which is a measure of volume sued for liquids and is equal to 29.57 milliliters (also called cubic centimeters). Since a fluid ounce is a measure of volume and a gram is a measure of weight, you can’t actually convert grams into fluid ounces. However, if you know the density of a liquid, you can figure out how many grams of the liquid are in a fluid ounce. Know how many grams of pure water are in one fluid ounce. When the modern metric system was developed starting in 1790s France, the gram was defined as the mass of cubic centimeter of water. A cubic centimeter is a milliliter (abbreviated ml) when referring to liquids. Since there is exactly 1.00 gram of water in a milliliter, there are 29.57 grams of water in one fluid ounce. Understand how density of a substance is measured. By definition, water has a density of 1.