Soup can be a surprisingly tricky food for potassium tracking. A simple chicken broth contains only about 50 mg of potassium per 100 g, while a hearty tomato soup can contain more than three times that amount. The difference matters for anyone monitoring potassium for kidney health, heart health, sports nutrition, or general meal planning.
This calculator turns a serving of soup into a usable potassium estimate. Choose a common soup type, enter your portion in cups or grams, and optionally add potassium-rich mix-ins such as chicken, white beans, spinach, or potato. The result gives you the total milligrams of potassium, the percentage of the FDA Daily Value, the concentration per 100 g, and a quick low/moderate/high label.
Use the figures as planning estimates, not lab measurements. Recipes, brands, and homemade versions vary, so the tool is best for comparing options and building balanced meals with more confidence.
🍲 What's in your bowl?
How to Use This Tool
Start by picking the soup style that matches what you plan to eat from the dropdown. If your soup is not listed, choose the closest base type; a creamy broccoli soup will behave more like cream of mushroom than minestrone. Then enter how much soup you will actually eat. You can type the serving in grams, or switch the unit to cups and the calculator will assume about 245 grams per cup, a typical density for prepared soup. This makes it easy to estimate a standard bowl without a food scale.
Next, tick any optional additions that are already mixed into your bowl. The calculator adds their potassium contributions separately because add-ins like beans, potatoes, and chicken change the mineral content of the meal significantly. Press Calculate potassium and the result area will show a total, a per-100 g value, the percentage of the FDA Daily Value, and a simple low/moderate/high label. Use the reset button to clear everything and start over.
Potassium Values by Soup Type
Potassium values vary by recipe, brand, and added salt, but the figures below give a practical baseline for common soups. They are expressed as milligrams per 100 grams, roughly 3.5 ounces or about 0.4 cup. The third column converts that to a 1-cup serving using the same 245 g per cup conversion.
| Soup type | Potassium mg / 100 g | Potassium mg / 1 cup (245 g) |
|---|---|---|
| Chicken noodle soup | 55 | 135 |
| Tomato soup | 184 | 451 |
| Vegetable soup | 109 | 267 |
| Miso soup | 180 | 441 |
| Lentil soup | 105 | 257 |
| Beef stew | 199 | 488 |
| Cream of mushroom soup | 65 | 159 |
| Minestrone soup | 130 | 319 |
| Chicken broth | 50 | 123 |
| Split pea soup | 120 | 294 |
Baseline values are approximate and adapted from common entries in USDA FoodData Central. Because recipes vary, treat them as starting points rather than exact nutrient claims.
How the Estimate Works
The math is straightforward: potassium (mg) = potassium per 100 g × serving grams ÷ 100. The tool stores a baseline potassium density for every soup in the dropdown, then multiplies that density by the amount you entered. If you input cups, it first converts 1 cup to 245 grams of prepared soup. Optional additions are simply summed on top of the base soup value because their potassium content is independent of the soup broth.
Tips for Potassium-Conscious Soup Eating
Limitations & Accuracy Notes
- The calculator uses generic baseline values. A specific brand can differ by 30–50% or more, especially when products add potassium-based preservatives or salt substitutes.
- Homemade soups vary with every ingredient. A vegetable soup that is mostly tomatoes and beans will contain much more potassium than one that is mostly broth and noodles.
- The 245 g per cup conversion is a useful average, but actual cup density can range from roughly 230 g for a light broth to 260 g for a thick stew.
- The % Daily Value uses the FDA adult reference of 4,700 mg per day. Children, older adults, and people with kidney disease or certain medications may have different targets, so check with a healthcare professional.
- The add-in values are typical approximations. A large restaurant portion of chicken could contribute more than 220 mg, while a smaller handful of spinach would add less.
Frequently Asked Questions
Are soups generally low in potassium? No. Clear broths and cream soups are often lower, but tomato-based soups, bean soups, and hearty vegetable stews can contain 400–500 mg per cup. The same bowl of minestrone can go from moderate to high simply by adding chickpeas or potato.
Does cooking destroy potassium in vegetables? Potassium is water-soluble, so it does not disappear during cooking; it leaches into the liquid. If you eat the soup broth, you consume that potassium. If you were to cook vegetables and then drain away the water, some potassium would be lost, but that is not how soup is normally eaten.
Can I use this calculator for a soup not in the list? Yes, choose the closest match and adjust with the optional additions. For example, a butternut squash soup is closer to tomato soup in potassium density than to chicken broth, while a plain rice soup is better matched to chicken noodle soup. If you are tracking other nutrients in soup as well, you can compare this potassium estimate with other nutrition calculators on the site to get a fuller picture of your meal.
Is a high-potassium level always bad? Not necessarily. Potassium is an essential mineral that supports blood pressure regulation, muscle contractions, and nerve signaling. Many active people need more potassium, not less. The tool simply labels a serving relative to the 4,700 mg daily reference; whether that is good or bad for you depends on your individual health needs.