Mayonnaise is a staple condiment, but when you're tracking potassium — for kidney health, chronic kidney disease, or managing high blood pressure — it can be hard to know if your sandwich spread really matters. The Mayonnaise Potassium Calculator takes the guesswork out of that question. Enter any amount of mayo, choose the unit (tablespoon, teaspoon, cup, gram, or ounce), and select the mayo type to get an instant potassium estimate.
The tool also lets you account for multiple servings, so a potato salad made with half a cup of mayo can be broken down into per-plate potassium. You'll see total potassium, potassium per serving, and the percent of the Daily Value.
This calculator is designed for nutrition-conscious cooks, people on kidney-friendly diets, and anyone curious about micronutrients in everyday condiments.
🧂 Mayonnaise Potassium Calculator
Estimate the potassium in any serving of mayonnaise — from a thin smear to a full cup.
Only used when “Custom” is selected above.
How to Use This Tool
This calculator is designed for anyone tracking potassium intake — whether you’re managing chronic kidney disease, keeping an eye on blood pressure, or just curious about your micronutrients. Enter the amount of mayonnaise you plan to use, choose a unit (tablespoon, teaspoon, cup, gram, or ounce), and pick the mayo style that matches your jar. If your brand doesn’t fit the presets, choose “Custom” and enter the potassium value from the nutrition label (usually shown as mg per 100 g).
- Set the amount — for example, 2 tablespoons of mayo for a sandwich.
- Choose the unit — the calculator converts it to grams automatically.
- Pick a mayo type — regular, light, olive-oil, vegan, or custom.
- Optional: enter the number of servings to split the total potassium across a recipe (like a potato salad made with ½ cup mayo).
- Press Calculate Potassium to see the total, per-serving, and percent Daily Value.
Formula Explained
The calculator uses a simple two-step conversion:
Step 1 — Convert to grams. Each unit has a typical gram weight: 1 tablespoon ≈ 13.6 g, 1 teaspoon ≈ 4.5 g, 1 cup ≈ 220 g, 1 fluid ounce ≈ 28.35 g.
Step 2 — Apply the potassium density. If a mayo contains P mg of potassium per 100 g, then:
Potassium (mg) = (amount in grams × P) ÷ 100
For example, 1 tablespoon of regular mayo (13.6 g) with P = 13 mg/100 g gives (13.6 × 13) ÷ 100 = 1.8 mg of potassium. That’s less than 0.04% of the 4,700 mg Daily Value. This is why mayo is often listed as “negligible” in potassium databases.
Sample Results
📊 Potassium Reference Values
Potassium values shown below are typical figures from nutrition databases such as USDA FoodData Central. Brands vary, so always check the label of your specific jar.
| Mayonnaise Type | Typical mg per 100 g | mg per tbsp (13.6 g) |
|---|---|---|
| Regular | ≈ 13 | ≈ 1.8 |
| Light / reduced-fat | ≈ 20 | ≈ 2.7 |
| Olive-oil mayo | ≈ 10 | ≈ 1.4 |
| Vegan / egg-free | ≈ 15 | ≈ 2.0 |
Tips for Low-Potassium Meal Planning
Mayonnaise is one of the few condiments you can usually include without stress on a potassium-restricted diet. Here’s why it fits:
- It’s naturally low in potassium — most commercial mayos contain under 25 mg per 100 g, much less than tomato ketchup, hummus, or avocado.
- Watch the sodium instead. Some light or flavored mayos pack 80–120 mg sodium per tablespoon. If you’re also limiting sodium, compare labels.
- Pair it with low-potassium foods. Use mayo in chicken/tuna salad, egg salad, or a simple lettuce wrap. Avoid combining it with high-potassium bases like beans or potatoes unless your diet plan allows.
- Track the full meal, not just the condiment. The potassium in the rest of your plate matters far more. If you need to compare, try the bean potassium calculator or the pumpkin potassium calculator to see how different foods stack up.
For kidney-specific guidance, the National Kidney Foundation has a helpful potassium overview for patients and caregivers.
❓ Frequently Asked Questions
Is mayonnaise allowed on a low-potassium diet?
Yes, in normal portions. A typical 1-tablespoon serving delivers about 1–3 mg of potassium, which is negligible against a typical daily target of 2,000–4,700 mg (depending on your medical advice).
Do light and regular mayo differ in potassium?
Only slightly. Light mayo has more water and often a bit more sodium, but its potassium content remains very low — usually 15–25 mg per 100 g. The differences across brands are small in absolute terms.
Why does my mayo label not show potassium?
Potassium is not required on the standard Nutrition Facts label unless the product makes a claim about it. That’s why many jars omit it. Food databases can give you an estimate, but the exact value can differ by recipe.
Can I use this calculator for mayo in recipes?
Yes. Enter the total amount of mayo in the recipe, then enter the number of servings. The tool will divide the potassium across servings so you know exactly what each plate contains.