One serving offers an array of macros. (1/2 cup) of cooked steel-cut oats has 150 calories, 5 g protein, 27 g carbs, 2 g fat and 4 g fiber. One serving (1 cup) of cooked rolled oats has an extra gram of fat. One packet of plain instant oats has 100 calories, 4 g protein, 19 g carbs, 2 g fat and 3 g fiber.read more >>