One 100 g serving of cereals ready-to-eat, post honey bunches of oats with cinnamon bunches has 400 calories, 82.8 g of carbs, and 5.8 g of fiber.
Full macro and micronutrient breakdown, plus how this compares across diets, is on the Cereals ready-to-eat, POST HONEY BUNCHES OF OATS with cinnamon bunches nutrition facts page.