Eggplant often flies under the radar when people think about plant-based iron. A 100 g serving of raw eggplant contains roughly 0.23 mg of iron — not a huge number, but useful when combined with beans, leafy greens, and vitamin C-rich foods. This eggplant iron calculator tells you exactly how much iron you're getting from the portion you plan to eat, whether you measure in grams, ounces, cups, or slices.
Choose raw, boiled, or grilled eggplant, punch in your serving size, and the tool returns total iron in milligrams, the percentage of the adult Daily Value, and a quick breakdown of the math. It's handy for vegans, vegetarians, meal planners, and anyone curious about the micronutrient content of their favorite nightshade vegetable.
🍆 Eggplant Iron Calculator
Find the iron in any serving of eggplant and see how it fits your daily needs.
Iron values are averages from USDA FoodData Central; % DV based on 18 mg for adults.
How the Calculator Works
The eggplant iron calculator converts your portion size into grams, multiplies by the iron density of the preparation you select, and then expresses the result both in milligrams and as a percentage of the adult Daily Value. The core formulas are:
% Daily Value = total iron (mg) ÷ 18 mg × 100
Raw eggplant contains about 0.23 mg of iron per 100 g. Boiled eggplant is slightly higher at around 0.25 mg per 100 g because water loss concentrates nutrients, and grilled eggplant comes in around 0.27 mg per 100 g. These are average figures from the USDA FoodData Central database; exact amounts vary with variety, growing conditions, and cooking time.
The calculator uses these common kitchen conversions: 1 ounce = 28.3495 g, 1 cup of diced eggplant ≈ 82 g, and 1 thick slice ≈ 20 g. If you have a digital scale, weighing in grams gives the most reliable result. For quick estimates, the preset buttons in the tool fill in typical portions such as one cup of diced eggplant or one medium whole eggplant.
🍆 Iron in Eggplant: Standard Values
The table below shows how iron content changes with preparation. It can help you plan meals without running the calculator each time.
| Preparation | mg per 100 g | mg per cup (82 g) | mg per medium eggplant (458 g) |
|---|---|---|---|
| Raw | 0.23 | 0.19 | 1.05 |
| Boiled | 0.25 | 0.21 | 1.15 |
| Grilled | 0.27 | 0.22 | 1.24 |
Reference data: USDA FoodData Central and NIH Office of Dietary Supplements.
📋 Step-by-Step Guide
- Select the form of eggplant you are eating: raw, boiled, or grilled.
- Enter the amount in the number field. You can use decimals for partial servings, such as 1.5 cups.
- Choose the matching unit: grams, ounces, cups of diced eggplant, or thick slices.
- Click Calculate Iron to see your total iron and percentage of the Daily Value.
- Use the Reset button to clear the form and start a new portion, or tap a preset button to quickly fill in a common serving size.
🧮 Worked Examples
Example 1: 100 g raw eggplant. 100 ÷ 100 × 0.23 = 0.23 mg iron, which is about 1.3% of the 18 mg Daily Value.
Example 2: 1 cup boiled diced eggplant. 82 ÷ 100 × 0.25 = 0.21 mg iron, about 1.1% DV.
Example 3: One medium eggplant, grilled. A 458 g eggplant grilled gives 458 ÷ 100 × 0.27 = 1.24 mg iron, about 6.9% DV.
As these examples show, eggplant makes a modest but real contribution to iron intake. It is best thought of as a supporting source alongside lentils, chickpeas, tofu, spinach, and fortified foods. If you are also tracking iron in other vegetables, a tool like fennel iron calculator can help you compare plant-based options.
Tips for Better Iron Absorption
Eggplant contains non-heme iron, which is absorbed less efficiently than the heme iron in meat, poultry, and fish. You can improve absorption by eating eggplant with foods rich in vitamin C, such as tomatoes, bell peppers, lemon juice, or broccoli. Vitamin C helps convert non-heme iron into a more absorbable form. On the other hand, tea, coffee, and calcium supplements taken with a meal can reduce iron absorption, so consider having them between meals.
If you follow a plant-based diet, be mindful that iron needs are roughly 1.8 times higher for vegetarians because of the lower absorption of non-heme iron. Pairing eggplant with beans or lentils in dishes like ratatouille or baba ganoush with chickpeas creates a more iron-dense meal.
Frequently Asked Questions
Is eggplant a good source of iron?
Eggplant is not one of the highest iron vegetables. It offers about 0.23 mg of iron per 100 g raw, which is lower than spinach, lentils, or tofu. However, it is low in calories, high in fiber, and easy to combine with other iron-rich foods, so it can play a supporting role in a balanced eating plan.
Does cooking eggplant change the amount of iron you get?
Cooking does not destroy iron, but it does change the concentration. As eggplant loses water during boiling or grilling, the same piece of eggplant has a higher iron value per 100 g. Boiling in a large amount of water and discarding the water can cause a small loss of water-soluble nutrients, though iron loss is generally minor.
Can eating eggplant help prevent anemia?
Eggplant alone is unlikely to prevent or correct iron-deficiency anemia. A reliable approach is to include a variety of iron sources — lean meat, seafood, beans, lentils, dark leafy greens, fortified cereals — and pair them with vitamin C. If you suspect anemia, speak with a healthcare professional before changing your diet.