The term "avocado" also refers to the fruit of this tree. An avocado is about 4 inches long and shaped like an egg. It's the primary ingredient in guacamole, a popular sauce for Mexican food.Serving InformationMyFitnessPal provides nutritional data for an avocado. This information is for the raw flesh of a medium avocado, and doesn't include the large pit inside the avocado.CaloriesAn avocado contains a total of 322 calories. Fat provides 261 calories, carbohydrates account for 45 calories and protein contributes the remaining 16 calories. This provides 16.1 percent of the daily value for calories, assuming a daily diet of 2,000 calories. Protein and CarbohydratesA serving of avocado provides 4 g of protein, or 8 percent of the daily value for protein. Avocados also contain 17 g of total carbohydrates per serving, which includes 13 g of dietary fiber. This provides about 6 percent of the daily value carbohydrates and 52 percent of the daily value for dietary fiber.FatAvocados contain 29 g of fat per serving, including 4 g of saturated fat and 25 g of saturated fat. This provides about 45 percent of the daily value for total fat and 20 percent of the daily value for saturated fat. Avocados contain no cholesterol.Vitamins and MineralsAn avocado contains 975 mg of potassium, or about 21 percent of the daily value for potassium. It also has 14 mg of sodium, which is less than 1 percent of the daily value for sodium. An avocado also contains about 34 percent of the daily value for vitamin C. Additional nutrients in an avocado include 6 percent of the daily value for iron and 2 percent of the daily value for calcium.