Question: 1 oz cereal equals how many cups?
Answer: The major complicating factor is that the standard serving sizes for cereals are based on density—not sheer amount. So a serving of a low-density cereal, such as Cheerios, might be 1 cup (1 ounce), while a serving of a dense cereal, such as granola, might be only ½ cup (2 ounces).