A medium-sized banana (about 7 to 8 inches long, weighing around 118 grams) contains approximately 27 grams of total carbohydrates. This includes about 3 grams of fiber, resulting in roughly 24 grams of net carbs (total carbs minus fiber)

. The carbohydrate content can vary with the size of the banana:

• Extra small (under 6 inches): ~19 grams of carbs
• Small (6–7 inches): ~23 grams of carbs
• Medium (7–8 inches): ~27 grams of carbs
• Large (8–9 inches): ~31 grams of carbs
• Extra large (9+ inches): ~35 grams of carbs

The carb composition also changes with ripeness. Unripe (green) bananas contain more resistant starch, which acts like fiber and is less digestible, while ripe bananas have more sugar and fewer resistant starches

. In summary, a typical medium banana has about 27 grams of carbs, with around 3 grams of fiber included in that total.