Peanuts are a compact snack with a surprisingly meaningful potassium contribution. A 100-gram serving of raw peanuts contains about 705 mg of potassium, which is roughly 15% of the recommended daily value. Yet most people eat peanuts by the handful, the tablespoon, or the 1-ounce snack pack, and translating those portion sizes into milligrams can be confusing. This calculator does that conversion for you in seconds, using food-composition data for raw, dry-roasted, oil-roasted, and boiled peanuts.
This tool is useful for athletes monitoring electrolyte balance, people tracking potassium for blood pressure or kidney-related nutrition plans, and anyone curious about how their favorite peanut snack fits into daily micronutrient totals. Just enter your portion, choose the peanut form you are actually eating, and the calculator will show potassium in milligrams, percent of Daily Value, and the true gram weight of your portion.
You can also use the quick-fill presets to skip straight to common portions such as a 1-ounce bag or a 2-tablespoon sprinkle. The result breakdown makes it easy to compare peanut forms and to combine this snack with other foods in a broader potassium-aware diet.
Step-by-Step Guide
This calculator is designed around the way people actually eat peanuts: by the ounce, handful, tablespoon, or whole cup. Start by choosing the peanut form that matches what you are eating, because dry-roasting and boiling both change the potassium concentration slightly.
- Enter the peanut amount in the number field. You can type grams directly, or switch the unit dropdown to ounces, cups, tablespoons, or handfuls.
- Choose the peanut form from the select menu: raw, dry roasted, oil roasted, or boiled.
- Use a quick-fill preset for a common portion, such as a 1 oz snack bag or a 2-tablespoon sprinkle for yogurt or oatmeal.
- Press Calculate Potassium to see the potassium in milligrams, the percentage of the Daily Value, the true gram weight of your portion, and the potassium density per 100 g of the selected form.
If you want to compare two portion sizes, press Reset, enter the second portion, and calculate again. The readout updates instantly after each calculation.
Where the Potassium Numbers Come From
The calculator uses potassium-per-100g values from the USDA FoodData Central reference database for common peanut preparations. The values used are:
The basic formula is simple: potassium (mg) = portion weight (g) × potassium per 100 g ÷ 100. For example, 28 g of raw peanuts delivers 28 × 705 ÷ 100 = 197 mg of potassium, while the same 28 g of oil-roasted peanuts delivers 28 × 507 ÷ 100 = 142 mg. The Daily Value column divides the result by the FDA adult reference amount for potassium, which is 4,700 mg per day, then multiplies by 100. If you are curious about the evidence behind potassium recommendations, the NIH Office of Dietary Supplements potassium fact sheet is a reliable starting point.
Worked Examples
Example 2: Two tablespoons over oatmeal. Two tablespoons of chopped peanuts weigh about 18 g. With raw peanuts, that is 18 × 705 ÷ 100 = 127 mg of potassium. If you are tracking a whole breakfast, run your oats through the oatmeal potassium calculator and add the two results together.
Example 3: A full 100 g portion of boiled peanuts. Boiled peanuts deliver 100 × 456 ÷ 100 = 456 mg, about 9.7% DV. They are lower in potassium than raw peanuts because water dissolves and removes some minerals during cooking, but they are also noticeably lower in fat and calories, which can make them a useful snack for some people.
Factors That Affect the Actual Potassium Content
- Roasting method: Dry and oil roasting slightly reduce potassium per 100 g compared with raw peanuts, mostly because of moisture loss and any added oil or seasonings.
- Added sodium: Salted peanuts can have a few hundred milligrams of sodium per serving. Sodium does not remove potassium, but it does change the sodium-to-potassium ratio, which is relevant for blood pressure research.
- Water content: Boiled peanuts absorb water during cooking, so their potassium concentration per gram drops; mineral loss into the cooking liquid also plays a role.
- Variety and growing conditions: Peanut cultivars and soil mineral content cause natural batch-to-batch variation of roughly ±10%, so the USDA values are averages, not precise measurements for every bag.
- Measurement error: Cup and handful estimates are useful but approximate. A digital kitchen scale in grams gives the most reliable result because peanut sizes and packing density vary.
Reference Table: Potassium in Common Peanut Portions
| Peanut form | Potassium per 100 g | Potassium in 1 oz (28 g) |
|---|---|---|
| Raw | 705 mg | 197 mg |
| Dry roasted | 634 mg | 178 mg |
| Oil roasted | 507 mg | 142 mg |
| Boiled | 456 mg | 128 mg |
The 1 oz column is based on a 28 g portion, which is the standard snack-size bag. If your bag says 32 g or 40 g, multiply the 100 g value by the actual weight divided by 100 instead.
Frequently Asked Questions
Can I use this calculator for peanut butter? Peanut butter has a different potassium density, typically about 649 mg per 100 g, plus added salt, sugar, and fat in many brands. This tool is built for whole peanuts, so check the nutrition label on your jar for a more accurate per-serving number.
Is peanut potassium helpful for athletes? Potassium is an electrolyte involved in muscle contraction, nerve signaling, and fluid balance, so a serving of peanuts can be part of a recovery or pre-workout snack. That said, cramps and electrolyte needs depend on many factors, including sweat losses, hydration, sodium, and magnesium, so treat the result as one piece of the puzzle.
Do I need to worry about potassium from peanuts on a kidney-friendly diet? People with chronic kidney disease are often advised to monitor potassium, and peanut portions can vary. If you are following a medical nutrition therapy plan, ask your renal dietitian or doctor whether peanuts fit your potassium target and what portion size is appropriate for you.
Why is there a boiled option? Boiled peanuts are popular in the southern United States and have a different nutrition profile because of water absorption and mineral loss. Including them makes the calculator useful for people who buy boiled peanuts at roadside stands or make them at home.
If you are comparing potassium sources across grains, you can also check the oatmeal potassium calculator or the barley potassium calculator to see how peanuts stack up against common breakfast staples.