One whole Hass avocado (136g without skin and seed) has 227 calories, 21g of fat, and 9.2g of fiber, according to USDA FoodData Central. That's more than a banana and an apple combined. But before you cross avocado off your grocery list, here's what matters more than that number: how much you actually eat.
Half an avocado? That's 114 calories — totally reasonable for a weight loss meal. A quarter? Just 57 calories. The difference between "avocado ruined my diet" and "avocado helped me stay full" usually comes down to whether you ate a measured portion or scooped straight from the skin.