Calories in a banana

It depends on the size. They range from:

The size of banana is going to play a large role in the number of calories in a banana. The larger the banana, the greater the number of calories.

Approximately 90 calories in one small banana (6″)

Approximately 150 calories in one bigger, more genetically engineered/ripened bananas (over 9″ long)

Approximately 105 calories in one 1 average size banana.

The majority of calories in a banana come from carbohydrates like sugar and starch.For about 100 calories, one banana provides three grams of healthy fiber and more than ten percent of the daily requirement of vitamin C, vitamin B6, potassium and manganese.