The calorie content of a banana varies mainly by its size:
- Extra small (under 6 inches, 81 grams): about 72 calories
- Small (6–7 inches, 101 grams): about 90 calories
- Medium (7–8 inches, 118 grams): about 105 calories
- Large (8–9 inches, 136 grams): about 121 calories
- Extra large (9 inches or longer, 152 grams): about 135 calories
On average, a medium banana contains roughly 105 calories
. Most of the calories in a banana come from carbohydrates, which make up over 90% of its caloric content. A medium banana typically has around 27 grams of carbs and 3 grams of fiber, with smaller amounts of protein and fat
. The ripeness of the banana can slightly affect its calorie content, as starch converts to sugars during ripening, but the overall calorie difference is minimal
. In summary, when estimating calories, you can consider a medium banana to have about 100–105 calories.
