A typical medium banana has about 105 calories.

Quick Scoop: How Many Calories Does a Banana Have?

For a simple, practical answer you can use day to day:

  • Most “normal” bananas you see in stores (medium size) are about 100–105 calories each.

If you want it a bit more precise by size:

  • Extra small (under 6 in / ~81 g): ~72 calories
  • Small (6–7 in / ~101 g): ~90 calories
  • Medium (7–8 in / ~118 g): ~105 calories
  • Large (8–9 in / ~136 g): ~121 calories
  • Extra large (9 in+ / ~152 g): ~135 calories

You can also think in terms of portions:

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

Mini Nutrition Snapshot

A medium banana isn’t just about calories:

  • Around 27 g carbs , with 3 g fiber and about 14 g sugars.
  • Roughly 1.3 g protein and 0.4 g fat.
  • Good source of potassium (about 400+ mg), plus vitamin C and vitamin B6.

Because of this mix of carbs, fiber, and potassium, bananas work well as a quick snack, a pre‑workout bite, or part of breakfast rather than just “empty calories.”

Tiny Real-Life Example

Imagine you grab a medium banana on your way out the door instead of a packaged 250‑calorie snack bar. You’ve just had about 105 calories , plus fiber and potassium, and you’re likely to feel reasonably full until your next meal.

Bottom line: if you’re tracking, assuming ~100 calories per banana is a solid, up-to-date estimate for most everyday purposes.

TL;DR:
Medium banana ≈ 105 calories. Range by size is roughly 72–135 calories per banana.

Information gathered from public forums or data available on the internet and portrayed here.