A banana contains calories that vary mainly by its size:
- Extra small (under 6 inches, ~81g): about 72–89 calories
- Small (6–7 inches, ~101g): about 90 calories
- Medium (7–8 inches, ~118g): about 100–105 calories
- Large (8–9 inches, ~136g): about 121 calories
- Extra large (9+ inches, ~152g): about 135 calories
On average, a medium banana has around 100 to 105 calories
. Most of these calories come from carbohydrates, which make up about 90% or more of the banana's calorie content. A medium banana typically contains about 27 grams of carbs, including 2–4 grams of fiber
. The calorie content can slightly vary depending on the banana's ripeness, as starch converts to sugars during ripening, which may increase calories marginally
. In summary, if you want a quick estimate, a medium banana has roughly 100 calories.
