Scale to GramsHow Much Does a Banana Weigh? Complete Size & Weight Guide
Average Banana Weight by Size
Banana weights vary significantly depending on size and variety. An extra-small banana (less than 6 inches) weighs about 81 grams (2.9 oz). A small banana (6 to 7 inches) weighs about 101 grams (3.6 oz). A medium banana (7 to 8 inches) weighs about 118 grams (4.2 oz). A large banana (8 to 9 inches) weighs about 136 grams (4.8 oz). An extra-large banana (9 inches or longer) weighs about 152 grams (5.4 oz). These weights include the peel. When you see banana weights listed on nutrition labels, they typically refer to the medium size.
With Peel vs. Without Peel
The peel accounts for roughly 35-40% of a banana's total weight. For a medium banana weighing 118g with the peel, the edible portion weighs about 70-75 grams. This matters for calorie counting because nutrition data is based on the edible portion only. If you are weighing bananas for a recipe, always weigh after peeling unless the recipe specifies otherwise. A quick rule of thumb: multiply the peeled weight by 1.6 to estimate the whole banana weight, or multiply the whole weight by 0.62 to estimate the peeled weight.
Banana Calories by Weight
Bananas contain about 89 calories per 100 grams of edible fruit. Using that ratio, an extra-small banana has about 72 calories, a small banana about 90 calories, a medium banana about 105 calories, a large banana about 121 calories, and an extra-large banana about 135 calories. Bananas are primarily carbohydrates (23g per 100g) with very little fat (0.3g) and moderate protein (1.1g). They are an excellent source of potassium (358mg per 100g), vitamin B6, and dietary fiber.
Why Banana Weight Varies
Several factors affect individual banana weight. Variety is the biggest factor — Cavendish bananas (the standard supermarket variety) are larger than Lady Finger or Red bananas. Ripeness also plays a role: bananas lose water as they ripen, so a very ripe banana weighs slightly less than a green one of the same size (approximately 2-5% less). Growing conditions, climate, and when the banana was harvested all influence final size and weight.
How to Estimate Banana Weight Without a Scale
If you do not have a kitchen scale, you can estimate banana weight using visual cues. Compare the banana to your hand — a banana that is the length of your hand from wrist to fingertip is approximately medium-sized (118g). You can also use AI-powered tools like Scale to Grams to photograph the banana and get an instant weight estimate. For cooking and baking, a rough estimate is usually sufficient. If a recipe calls for "2 medium bananas," you need approximately 236 grams of peeled fruit.
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