Question: how many grams is 1 cup of cereal?
Answer: For many cereals (corn flakes, for example), the nutrition label lists 1 cup, which weighs something like 28 grams (about 1 ounce). One of General Mills' new Curves cereals, Whole Grain Crunch, has a serving size of 3/4 cup, or 27 grams. It's a little denser than corn flakes, so a serving is less than a cup.