There are 28.35 grams in an ounce. An ounce is a unit of measurement for weight, and it is equal to 28.35 grams. This means that there are 28.35 grams of weight in an ounce. One ounce is also equivalent to 0.0625 pounds, so you can use this conversion to determine the weight of an object in ounces if you know its weight in pounds. For example, if you have a 1-pound object, you can multiply 1 by the conversion factor of 0.0625 to determine that the object weighs 16 ounces.