Nutrition Flash Calories in one medium-sized avocado April 2, 2014September 7, 2015 0 Comment avocado nutrition facts, Calories in one medium-sized avocado, daily diet An avocado contains 321 calories, of which 246 calories from fat, 59 calories from carbohydrates and 16 calories from protein. About 16 percent of the daily value for calories, assuming a daily diet of 2,000 calories.