Banana Potassium Calculator
Enter a banana size and quantity to see total potassium in milligrams, its share of an adult daily target, and how it compares with other potassium-rich foods.
Result
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Total potassium
— mg
- Daily target share
- Banana weight
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Other potassium-rich foods
| Food | Potassium |
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How much potassium is in a banana?
If you are asking how much potassium in a banana, the answer depends on its size. A medium raw banana has about 422 mg of potassium, calculated from its 118 g weight and 3.58 mg per gram.
The banana is famous for potassium, but it is not a leading source. A baked potato with skin, cooked white beans, cooked spinach and cooked lentils all provide substantially more potassium than a medium banana.
A medium banana also has about 105 kcal, 27 g carbohydrate, 14.4 g sugar and 3.1 g fibre. Use the optional age and sex fields to compare your total with the supplied adult daily targets.
Potassium (mg) = banana weight (g) × 3.58 mg/g × quantity The calculator uses the supplied raw-banana weights and potassium figures. Adult daily targets are 3,400 mg for men 19+ and 2,600 mg for women 19+; it does not calculate a target for people under 19.
USDA FoodData Central ↗NIH Office of Dietary Supplements: Potassium ↗
Banana potassium calculator FAQ
How much potassium is in a medium banana?
A medium raw banana weighs 118 g and has about 422 mg of potassium using the supplied 3.58 mg per gram figure.
Does banana size change the potassium amount?
Yes. This calculator uses the supplied weight for each standard size, from 81 g for an extra-small banana to 152 g for an extra-large banana, then computes potassium from weight.
What foods have more potassium than a banana?
The comparison includes a baked potato with skin, cooked white beans, cooked spinach and cooked lentils. Each supplied serving has more potassium than the 422 mg in a medium banana.
Can I see a percentage of my daily potassium target?
Yes. Enter an age of 19 or older and choose men or women. The calculator uses 3,400 mg for men and 2,600 mg for women.
Is this a complete daily potassium calculator?
No. It shows the contribution from bananas. For the full daily picture, use the sibling tool at /tools/daily-potassium-calculator.