Potassium in banana
Banana has 385 mg of potassium per 1 medium (7" to 7-7/8" long) (118 g), which is 8.2% of the Daily Value. Per 100 g it contains 326 mg. Among fruits it ranks #6 of 50 for potassium per serving, and #83 of 100 across all whole foods.
Potassium by portion size
| Portion | Weight | Potassium (mg) | % Daily Value |
|---|---|---|---|
| 1 cup, mashed | 225 g | 734 | |
| 1 cup, sliced | 150 g | 489 | |
| 1 extra small (less than 6" long) | 81 g | 264 | |
| 1 small (6" to 6-7/8" long) | 101 g | 329 | |
| 1 medium (7" to 7-7/8" long) | 118 g | 385 | |
| 1 large (8" to 8-7/8" long) | 136 g | 443 | |
| 1 extra large (9" or longer) | 152 g | 496 | |
| 1 NLEA serving | 126 g | 411 |
About potassium
Potassium is an electrolyte that helps regulate fluid balance, nerve signals and muscle contractions, and a higher intake is linked to lower blood pressure. The Daily Value is 4,700 mg, which most people do not reach. Beans, potatoes, leafy greens, fish, dairy and fruit are the main sources.
Foods with more potassium than banana
- Beet greens, cooked (boiled, drained, without salt): 1,309 mg per 1 cup (1" pieces) (28% DV)
- Beans, adzuki (mature seeds, cooked, boiled, without salt): 1,224 mg per 1 cup (26% DV)
- Beans, white (mature seeds, canned): 1,189 mg per 1 cup (25% DV)
- Avocados, raw (Florida): 1,067 mg per 1 fruit without skin and seeds (23% DV)
- Soybeans, green (cooked, boiled, drained, without salt): 970 mg per 1 cup (21% DV)
All foods high in potassium · Full banana nutrition facts
Frequently asked questions
How much potassium is in banana?
Banana has 385 mg of potassium per 1 medium (7" to 7-7/8" long) (118 g), which is 8.2% of the Daily Value. Per 100 g it contains 326 mg.
Is banana high in potassium?
Not especially. One serving provides 8.2% of the Daily Value, below the 10% FDA threshold for a 'good source'. Among fruits it ranks #6 of 50 for potassium per serving, and #83 of 100 across all whole foods.
How much potassium do I need a day?
The FDA Daily Value is 4,700 mg. One 1 medium (7" to 7-7/8" long) of banana covers 8.2% of it.
Source: USDA FoodData Central #173944.
Nutrient values are from USDA FoodData Central (SR Legacy, April 2018; Foundation Foods, April 2026) and shown per serving as described on each page. %DV uses the FDA Daily Values for adults and children aged 4 and over. This is nutrition data for general information, not medical or dietary advice; talk to a clinician or registered dietitian about your own needs. How the numbers are calculated.