Zucchini is a versatile, low-calorie summer squash that often flies under the radar when it comes to micronutrients. Yet a single medium zucchini delivers roughly 500 mg of potassium — about 11% of the daily value — while contributing only 33 calories. For anyone tracking potassium for kidney health, blood pressure management, or athletic performance, knowing exactly how much you're getting from your zucchini can make a real difference.
This calculator lets you estimate the potassium content of zucchini in any form you actually eat: raw, cooked, spiralized, or grated. Simply enter the amount and choose your unit and preparation method, and you'll get an instant potassium estimate along with a breakdown of related nutrients. Whether you're meal-prepping, following a renal diet, or just curious about your micronutrient intake, this tool gives you quick, reliable numbers.
Use the quick-fill buttons for common serving sizes, or type in your own values. The calculator also shows how your zucchini portion contributes to your daily potassium target, so you can plan your meals with confidence.
🥒 Zucchini Potassium Calculator
📊 Results
How to Use This Tool
Enter the amount of zucchini you plan to eat, select the unit that matches how you measure it (whole medium zucchini, cups of chopped raw, sliced cooked, spiralized, or grated), and choose whether it's raw or cooked. The calculator then converts your portion to grams and applies the appropriate potassium density. You can also set your personal daily potassium target — the default is 3,500 mg, which is the general adult recommendation, but you can adjust it to match your doctor's advice or your specific dietary plan.
For quick estimates, use the preset buttons for common servings like one medium zucchini or one cup of raw chopped zucchini. The result panel shows the total potassium in milligrams, the approximate weight of your portion, and the percentage of your daily target that portion covers. This makes it easy to compare different portion sizes or preparation methods side by side.
How It Works
The calculator uses average potassium values from the USDA FoodData Central database. Raw zucchini contains about 261 mg of potassium per 100 grams, while cooked (boiled and drained) zucchini contains about 180 mg per 100 grams. The difference is largely due to water loss during cooking, which concentrates some nutrients, but also because some potassium leaches into the cooking water. If you boil zucchini and discard the water, you lose a meaningful amount of potassium — up to 30% or more.
To estimate potassium for any portion, the tool first converts your chosen unit to grams using standard food weights. For example, one medium zucchini (about 196 g) yields roughly 51 mg of potassium when raw. A cup of chopped raw zucchini (about 124 g) provides about 32 mg. The formula is simple: potassium (mg) = weight (g) × potassium per gram. For cooked zucchini, the weight per cup is higher (about 180 g) because the slices are denser after water loss, but the potassium per gram is lower.
These values are averages; actual potassium can vary by variety, growing conditions, and cooking method. For precise medical or renal diet planning, always consult a registered dietitian or your healthcare provider.
Worked Examples
Example 1: You eat 1.5 cups of raw chopped zucchini. Weight = 1.5 × 124 g = 186 g. Potassium = 186 × 0.261 = 48.5 mg. That's about 1.4% of a 3,500 mg daily target.
Example 2: You have 200 g of cooked zucchini slices. Potassium = 200 × 0.180 = 36 mg. If your daily target is 2,000 mg (common for kidney diets), this portion covers 1.8%.
Example 3: A spiralized zucchini noodle bowl uses 2 cups of raw spirals. Weight = 2 × 101 g = 202 g. Potassium = 202 × 0.261 = 52.7 mg. This shows that even a generous serving of zucchini noodles contributes relatively little potassium, making it a good choice for low-potassium meal plans.
Tips & Best Practices
- If you're on a potassium-restricted diet, remember that cooking method matters. Boiling zucchini in a large amount of water and discarding the water reduces potassium more than steaming or sautéing. This calculator assumes boiled and drained for the cooked option.
- For raw zucchini, the skin contains a good share of the potassium, so don't peel it unless you need to for texture or taste.
- Use a kitchen scale for the most accurate results. Volume measurements like cups can vary depending on how finely you chop or grate the zucchini.
- Pair zucchini with other low-potassium vegetables to keep your total intake in check. If you're tracking potassium for hypertension, remember that the DASH diet emphasizes potassium-rich foods, but always follow your healthcare provider's guidance.
Factors Affecting Accuracy
Several factors can cause the actual potassium content to differ from the estimate. The variety of zucchini (green, yellow, or pattypan) can have slightly different mineral profiles. Soil mineral content and farming practices also play a role. Cooking time and water volume matter: the longer you boil, the more potassium leaches out. If you steam or microwave, less potassium is lost. Also, the weight of a "medium" zucchini can range from about 150 g to 250 g, so using the actual weight from a scale is always more reliable than assuming a standard size.
For clinical purposes, such as managing chronic kidney disease, these estimates should be used only as a general guide. Laboratory analysis of your specific food is the only way to get exact numbers, but that's rarely practical. Instead, use this tool to build a consistent, reasonable estimate for meal planning.
Frequently Asked Questions
Is zucchini high in potassium? Compared to bananas or potatoes, zucchini is moderate. A medium raw zucchini has about 51 mg, which is roughly 1.5% of the daily value. It's not a major potassium source, but it contributes to your overall intake.
Does cooking always reduce potassium? Yes, especially if you boil in water and drain. The potassium dissolves into the cooking water. Steaming or microwaving with minimal water preserves more. If you use the cooking water in a soup or sauce, you retain the potassium.
Can I use this calculator for other squash? The values are specific to zucchini. Yellow squash and other summer squashes have similar but not identical potassium content. For other vegetables, look for a dedicated calculator or use a nutrition database.
What is the daily potassium recommendation? The general adult recommendation is 3,400 mg for men and 2,600 mg for women, but many guidelines use 3,500 mg as a simple target. People with kidney disease or those on certain medications may need a different target — always follow your doctor's advice.
For more detailed nutrient data, you can consult the USDA FoodData Central database, which is the source for the values used here.