The number of calories in a banana varies primarily by its size:
- Extra small (under 6 inches, ~81 g): about 72 calories
- Small (6–7 inches, ~101 g): about 90 calories
- Medium (7–8 inches, ~118 g): about 105 calories
- Large (8–9 inches, ~136 g): about 121 calories
- Extra large (over 9 inches, ~152 g): about 135 calories
On average, a typical medium banana contains around 100 to 105 calories
. Most of the calories in a banana come from carbohydrates (about 93%), with smaller amounts from protein (4%) and fat (3%)
. The calorie content can also be influenced by the banana's ripeness, as starch converts to sugars during ripening, slightly increasing the calorie content
. In summary, you can estimate about 100 calories for an average medium banana, with variations depending on size and ripeness.
