Nectarines are a juicy, low-calorie summer fruit, but many people are surprised by how modest their vitamin C content really is. A medium nectarine provides only about 7.7 mg of vitamin C — roughly 8.5% of the 90 mg Daily Value — while a 100 g portion supplies about 5.4 mg. This calculator converts any amount of raw nectarine into milligrams of vitamin C, shows how it stacks up against your daily target, and tells you how many nectarines you would need to reach that target.
Use it for quick meal snapshots, meal planning, or nutrition tracking. Just enter how much nectarine you’re eating — grams, ounces, cups of slices, or whole fruit sizes — and the tool does the rest. The calculations are based on USDA food-composition data for raw nectarines and the current FDA Daily Value for vitamin C, so you get consistent, practical estimates for real-world diet planning.
🧮 Nectarine Vitamin C: Amount Converter
Default: 90 mg, the FDA Daily Value for adults.
Quick Start: Using the Nectarine Vitamin C Calculator
This calculator is designed for fast nutrition estimates. Start by choosing the amount of nectarine you want to evaluate. If you're eating whole fruit, pick "small nectarine," "medium nectarine," or "large nectarine" and enter the number of pieces. For recipes, pick "grams," "ounces," or "cup, sliced" and enter the weight or volume. The default Daily Value field is 90 mg, but you can change it if you are tracking against a personal target — for example, 200 mg during cold-and-flu season.
- Enter the amount of nectarine using the number field.
- Select the matching unit from the dropdown.
- Adjust the Daily Value reference if needed.
- Click Calculate to see milligrams, percent DV, and a step-by-step breakdown.
What counts as a "medium" nectarine? In USDA portion data, a medium nectarine weighs about 142 g (roughly 5 oz) with the pit and skin handled as in typical eaten portions. Small and large sizes average 129 g and 156 g respectively.
How the Calculation Works
The tool uses the USDA standard value of 5.4 mg of vitamin C per 100 g of raw nectarine. Converting that to a per-gram basis gives:
Formula: Vitamin C (mg) = weight of edible portion (g) × 0.054 mg/g
To estimate percent of Daily Value, the result is divided by your reference amount (90 mg by default) and multiplied by 100. For example, a 142 g medium nectarine contains 142 × 0.054 = 7.67 mg, which is about 8.5% of 90 mg. Whole-fruit weights are based on USDA's typical edible portion sizes, which include the skin and flesh but exclude the pit. The same conversion factor applies whether you enter grams, ounces, cups, or pieces, because every unit is first converted to grams.
The 90 mg Daily Value is the FDA reference used on Nutrition Facts labels for vitamin C. You can read more about the current Daily Value standards at the FDA's Daily Value page. Individual needs differ: people who smoke are advised to consume an extra 35 mg of vitamin C daily, and some experts recommend higher intakes under stress or illness.
Worked Examples
Example 1 — One large nectarine (156 g): 156 × 0.054 = 8.42 mg. At a 90 mg reference, this provides 8.42 ÷ 90 × 100 ≈ 9.4% of your Daily Value.
Example 2 — One cup of sliced nectarines (143 g): 143 × 0.054 = 7.72 mg, or about 8.6% DV. This is very close to a medium whole fruit because the average cup of slices weighs almost the same.
Example 3 — A 250 g nectarine snack: 250 × 0.054 = 13.5 mg, about 15% DV. To reach 90 mg with medium nectarines alone you would need 90 ÷ 7.67 ≈ 11.7 pieces — more than most people would want to eat in a day, which is why nutrition guidance emphasizes variety.
Reference Table: Nectarine Portions and Vitamin C
The figures below assume raw nectarine and a 90 mg Daily Value.
| Portion | Edible weight | Vitamin C | % DV |
|---|---|---|---|
| 100 g | 100 g | 5.4 mg | 6.0% |
| 1 small (2⅓ in diameter) | 129 g | 7.0 mg | 7.8% |
| 1 medium (2½ in diameter) | 142 g | 7.7 mg | 8.6% |
| 1 large (2¾ in diameter) | 156 g | 8.4 mg | 9.4% |
| 1 cup sliced | 143 g | 7.7 mg | 8.6% |
Tips for Maximizing Vitamin C from Nectarines
- Eat the skin. Much of the fruit's surface area is where vitamin C sits; peeling removes some of the edible nutrients and fiber.
- Choose ripe but firm fruit. Vitamin C starts to degrade after harvest, and prolonged refrigeration can slowly lower levels, so don't store nectarines for weeks.
- Pair with high-C foods. Add berries, kiwi, citrus, or bell peppers to the same meal or snack to make a far more vitamin-C-rich plate.
- Use leftover fruit promptly. Sliced nectarine exposed to air loses moisture and vitamins. If you can't eat it within a day, freeze slices for smoothies.
Want to compare nectarines with other vitamin C fruit sources? Try the Cantaloupe Vitamin C Calculator or check the Apricot Nutrition Calculator for another stone-fruit option.
Limitations & Precision Notes
All nutritional values are estimates. The 5.4 mg per 100 g figure is a USDA composite for raw nectarines; actual vitamin C content varies with variety, growing conditions, ripeness, storage time, and preparation. Whole-fruit weights are averages, and a nectarine that looks medium at the store may weigh 120 g or 160 g. For the most accurate result, use a kitchen scale and weigh the edible portion in grams.
Note: This tool should not replace professional dietary advice. If you are managing a medical condition, taking vitamin C supplements, or following a special diet, consult a registered dietitian or healthcare provider. Vitamin C is water-soluble, but very high doses from supplements (typically 2,000 mg/day) can cause digestive upset in some people.
For a deeper dive into vitamin C content across foods, the USDA FoodData Central database is a reliable, searchable reference.