This nectarine protein calculator quickly estimates how much protein you get from nectarines, whether you are counting macros, meal prepping, or just curious about the nutritional value of a summer snack. Nectarines are a low-protein fruit, but their exact contribution adds up when combined with yogurt, cottage cheese, or nuts in a balanced breakfast or dessert.
Simply enter a serving size — one medium fruit, a cup of slices, or a precise weight in grams or ounces — and the calculator returns protein grams, calories from protein, and the percentage of the daily value for protein. You can also adjust the protein value per 100 g to match the exact label on fresh or frozen nectarines.
Because the tool breaks down the math step by step, it works well for students learning nutrition calculations, dietitians double-checking meal plans, and anyone using a food diary or calorie-tracking app.
🍑 Protein in Nectarines
Estimate protein from fresh, frozen, or canned nectarines.
How to Use This Tool
Begin by selecting how you measured your nectarines. You can enter a simple count of small, medium, or large fruit; a volume like one cup of slices; or a precise weight in grams or ounces. The quick-fill preset buttons snap the amount and unit into place: Small, Medium, Large, 1 cup, and 100 g. If you own a food scale, weighing in grams is the most accurate approach because individual nectarines vary considerably in size. Fruit sold in bulk can differ by 30 g or more from the USDA reference weights, so a scale eliminates guesswork.
Next, check the “Protein per 100 g” box. The default 1.06 g comes from the USDA FoodData Central entry for raw nectarines. If you are eating a different form — frozen slices, canned halves in juice or syrup, or a specific cultivar — replace that number with the value printed on the package. Then press Calculate. The result panel shows total protein, calories from protein, and the percent of the FDA Daily Value, which assumes a 2,000-calorie diet and a target of 50 g of protein per day.
How It Works
The calculation runs in two simple steps. First, the tool converts your chosen serving into grams. It uses these reference weights: one small nectarine = 129 g, one medium nectarine = 142 g, one large nectarine = 156 g, and one cup of sliced nectarines = 143 g. For ounces, it multiplies by 28.3495 grams per ounce.
Once the serving weight is known, the protein content is found with the formula:
Protein (g) = serving weight (g) × protein per 100 g ÷ 100
So a 142 g medium nectarine with the default value gives 142 × 1.06 ÷ 100 = 1.51 g of protein. The tool also reports energy from protein using the standard Atwater factor of 4 kcal per gram, and converts the protein result into a percentage of the 50 g Daily Value. These extras make it easy to compare nectarines with other foods in a macro tracker.
Worked Examples
Example 1 — One medium nectarine, 142 g: 142 g × 1.06 g/100 g ÷ 100 = 1.51 g protein. Multiply by 4 kcal/g to get about 6.0 kcal from protein. The Daily Value contribution is 1.51 ÷ 50 × 100 = 3.0%.
Example 2 — 200 g of sliced nectarine: 200 × 1.06 ÷ 100 = 2.12 g protein, roughly 8.5 kcal from protein, or 4.2% of the Daily Value.
Example 3 — A 6 oz serving weighed on a food scale: convert ounces first: 6 × 28.3495 = 170.1 g. Then 170.1 × 1.06 ÷ 100 = 1.80 g protein.
Reference Data
| Serving | Weight | Protein |
|---|---|---|
| 1 small nectarine | 129 g | 1.37 g |
| 1 medium nectarine | 142 g | 1.51 g |
| 1 large nectarine | 156 g | 1.65 g |
| 1 cup sliced | 143 g | 1.52 g |
| 100 g raw | 100 g | 1.06 g |
Values assume raw, unpacked fruit using USDA standard reference data. The table is handy when you are meal planning without a scale; for logging in an app, weighing the actual fruit is more reliable.
Factors Affecting Accuracy
The greatest source of error is fruit size. A “medium” nectarine is an average, not a guarantee; a single fruit can easily weigh 120 g or 170 g. Variety also matters — white-flesh and yellow-flesh nectarines have nearly identical macros, but growing conditions, ripeness, and water content cause small shifts in protein density. Frozen nectarines often lose a little moisture after thawing, which can slightly raise protein per 100 g. Canned products are the most variable because they contain added syrup or juice, so their label values are essential.
Because nectarines are low in protein, a difference of 0.2 g in the per-100g value changes the result by only about 0.3 g per serving. The tool is therefore accurate enough for everyday tracking, but it is not a substitute for laboratory analysis of a specific batch of fruit.
Common Mistakes to Avoid
Do not confuse fluid ounces (a volume measure) with weight ounces used by the calculator. Do not use raw-fruit values for dried nectarines, which pack far more protein and sugar into the same weight. And when using canned nectarines, remember that syrup contributes extra carbohydrates and calories even though the protein percentage barely changes.
Frequently Asked Questions
Are nectarines a good source of protein?
No. A medium nectarine provides about 1.5 g of protein, so it contributes little toward daily needs. Pair it with Greek yogurt, cottage cheese, nuts, or seeds if you want the fruit in a higher-protein meal or snack.
Can I use this calculator for frozen or canned nectarines?
Yes — change the protein-per-100g field to match the nutrition label on the package. For frozen fruit, thaw and drain excess liquid before weighing; for canned fruit, decide whether to include the syrup in the weight.
Why does the calculator show calories from protein?
Protein provides 4 kcal per gram, and this line helps you see how small the protein calorie contribution is compared with the fruit’s total calories, which are mostly from carbohydrates.
How should I log nectarines in my calorie app?
Apps often list entries like “nectarines, raw” per 100 g, or roughly one fruit. Weigh the flesh after removing the pit for the most accurate entry, and use the editable protein value in this tool to double-check your app’s number.
Nutrition data: USDA FoodData Central · Daily Value reference: FDA Nutrition Facts Label