Persimmons are a bright, honey-sweet autumn fruit that often show up in salads, baked goods, and smoothies. Although they are not the first food people think of when counting potassium, a single Japanese/Fuyu persimmon supplies about 270 mg of potassium, and native American persimmons pack roughly twice that amount per 100 grams. This calculator turns any persimmon serving into a precise potassium figure in seconds.
Choose the persimmon type, enter a serving size in grams, ounces, medium fruits, or cups of sliced fruit, and the tool will calculate total potassium, the percentage of the 4,700 mg Daily Value, and an easy banana-equivalent comparison. It is designed for home cooks, diet tracking, meal planning, and anyone curious about this fruit's micronutrient profile.
Persimmon Potassium Calculator
Estimate the potassium in fresh persimmons using USDA reference values.
How to Use This Tool
Start by selecting the type of persimmon you are eating. The Japanese/Fuyu option uses the common supermarket persimmon, while the American/native option uses the smaller wild persimmon, which is higher in potassium per 100 grams. Next enter a serving size. You can type a number in grams or ounces, or use medium fruits and cups of sliced fruit. The preset buttons fill in typical portions instantly. After you press Calculate Potassium, the tool shows the serving weight, potassium per 100 g, total potassium, the percentage of the 4,700 mg Daily Value, and a quick banana-equivalent comparison.
How It Works
Potassium values are taken from the USDA FoodData Central. The calculator applies a simple proportional conversion:
Potassium (mg) = serving weight (g) × potassium per 100 g ÷ 100
To keep the tool flexible, it converts your chosen unit into grams first. One ounce equals 28.35 g, one medium Japanese persimmon is treated as 168 g of edible flesh, and one cup of sliced Japanese persimmon is treated as 122 g. The Daily Value used for potassium is 4,700 mg for adults and children over age four, based on FDA nutrition labeling. If you want a general reference on potassium, the NIH Office of Dietary Supplements has a detailed fact sheet.
Persimmon Potassium Reference Table
| Form | Potassium per 100 g | Common portion | Potassium in portion |
|---|---|---|---|
| Japanese/Fuyu, raw | 161 mg | 1 medium fruit (168 g) | ≈270 mg |
| Japanese/Fuyu, sliced | 161 mg | 1 cup sliced (122 g) | ≈196 mg |
| American/native, raw | 310 mg | 100 g (about 3–4 small fruits) | 310 mg |
These are rounded values for fresh, raw fruit. Dried persimmon is much more concentrated in potassium because most of the water has been removed.
Worked Examples
Example 1: Two Japanese/Fuyu persimmons. Two medium fruits equal about 336 g. Using 161 mg per 100 g: 336 × 161 ÷ 100 = 541 mg, which is about 12% of the 4,700 mg Daily Value.
Example 2: A 4-ounce serving of American persimmon. Four ounces equals 113 g. With 310 mg per 100 g: 113 × 310 ÷ 100 = 350 mg, about 7% of the Daily Value.
Example 3: One cup of sliced Japanese persimmon. A typical cup weighs 122 g, so 122 × 161 ÷ 100 = 196 mg, roughly 4% of the Daily Value.
Frequently Asked Questions
Are persimmons a high-potassium fruit? Japanese persimmons are moderate at about 161 mg per 100 g, less than bananas, which provide around 358 mg per 100 g. American/native persimmons are higher at about 310 mg per 100 g. Persimmons can still contribute meaningfully to daily potassium goals, especially in a balanced diet.
Can I eat persimmon on a low-potassium diet? A single small Japanese persimmon may fit into some low-potassium meal plans, but individual limits vary widely depending on kidney function. Always check with your doctor or renal dietitian before changing potassium intake.
Does ripeness change potassium levels? Ripeness has a much larger effect on sugar content than on minerals. Fresh ripe and firmer persimmons have broadly similar potassium values, although drying removes water and concentrates potassium considerably.
Need another fruit comparison? Try the mango potassium calculator or fennel potassium calculator for similar nutrient estimates.
Limitations and Accuracy Notes
Like all whole foods, persimmons vary by variety, growing region, soil, and ripeness. USDA reference values are laboratory averages, not guarantees for every piece of fruit. Fruit size also varies: a very large Fuyu can weigh over 200 g, while a small one can be under 120 g. The calculator assumes 168 g per medium Japanese persimmon and 122 g per cup of sliced fruit, so using a kitchen scale will always give a more precise estimate. If you are tracking potassium for a medical condition, use values confirmed by your care team and remember to account for any other potassium sources in a meal.