This variety of avocado is grown in California, New Zealand and Central America. Hass avocados contain many different nutrients packed inside the small fruit. A whole Hass avocado without the pit and skin contains between 250 and 289 calories, depending on size. The Hass Avocado Board lists a serving size as one-fifth of an avocado. Hass avocados contain up to 26 grams of total fat per whole fruit, according to Calorie King, which accounts for 41 percent of your daily needs.