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7 Shocking Facts About Banana Calories: Are They Good or Bad for You?

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Have you ever peeled a banana and wondered, “How many calories did I just eat?” If so, you’re not alone! Whether you’re logging your macros, working toward weight loss, or just curious about healthier snacking, knowing the details about banana calories can help you make smarter choices every day.

In this easy-read guide, let’s explore just how many banana calories you’re getting, how size and ripeness affect those numbers, and why bananas are more than just a source of quick energy. By the end, you’ll see why this humble fruit makes such a great addition to your daily routine no calorie calculator required!

What’s the Calorie Content of One Banana?

In the fruit world, not all bananas are created equal at least, not when it comes to calories. Banana calories depend on two things: size and ripeness. Here’s a quick cheat sheet (based on USDA data) to help you figure out the calories in your banana at a glance:

Banana SizeWeight (g)Calories
Extra Small (6″)~81g~72 kcal
Small (6–7″)~101g~90 kcal
Medium (7–8″)~118g~105 kcal
Large (8–9″)~136g~121 kcal
Extra Large (over 9″)~152g~135 kcal

Prefer your banana mashed or sliced? Here’s how those banana calories stack up:

  • 1 cup mashed banana: ~200 kcal (225g)
  • 1 cup sliced banana: ~134 kcal (150g)

Pro tip: As bananas ripen, their starch converts to sugar which bumps the calorie tally up just a tad. So, if you like them spotty and sweet, you’re also getting a smidge more fuel!

Nutritional Breakdown: More Than Just Banana Calories

Let’s set calories aside for a second because bananas have so much more to offer. Here’s what’s inside a medium banana (about 105 calories):

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  • Carbohydrates: 27g (including 14g natural sugar)
  • Fiber: 3g
  • Protein: 1.3g
  • Fat: 0.3g
  • Potassium: 422 mg (12% of daily needs)
  • Vitamin B6: 20% of daily needs
  • Vitamin C: 17% of daily needs
  • Magnesium: 8% of daily needs

So when you think of banana calories, remember: they deliver a lot of nutrition for every bite fueling your body with energy, vitamins, minerals, and fiber.

Banana Calories vs. Popular Snacks

Ever reach for a banana instead of a granola bar? Here’s how a medium banana compares to a few common snacks: