Cranberries are a tart, low-calorie fruit often associated with urinary tract health, but they are not generally considered a significant source of iron. Raw cranberries contain only about 0.25 mg of iron per 100 g — roughly 1.4% of the Daily Value. However, the form you choose matters: dried cranberries, juice, and sauce have different water content and iron density per 100 g, so a half-cup of dried berries can contain noticeably more iron than a half-cup of raw fruit.
This calculator lets you quickly estimate iron from any serving of cranberries. Enter your amount, select a unit (grams, ounces, cups, or tablespoons), and choose a cranberry product form — raw, dried, 100% juice, or canned sauce. The tool converts the serving to grams, applies the correct iron density, and reports iron in milligrams plus its percentage of the reference Daily Value. It is ideal for diet tracking, menu planning, and anyone curious about iron contributions from fruit.
🍒 Cranberry Iron Calculator
Estimate the iron content in raw cranberries, dried cranberries, juice, or sauce.
Estimates based on approximate USDA values. Not medical advice.
How to Use This Tool
Start by entering the amount of cranberries you plan to eat. The amount field accepts numbers with decimals, so you can type 0.5 for half, 1.25 for one and a quarter, and so on. Then choose the unit: grams, ounces, cups, or tablespoons. Finally, select the cranberry product form that best matches what is on your plate — raw whole berries, sweetened dried cranberries, 100% juice, or canned sauce. Press “Calculate Iron” and the result panel will show the estimated iron in milligrams, the served weight in grams, and the percentage of the 18 mg Reference Daily Value. Use the quick-fill buttons for common servings if you want a fast estimate, or click “Copy Result” to place the iron value on your clipboard for a food journal.
How Iron in Cranberries Is Calculated
Iron content is calculated from the water-adjusted density of each cranberry form. Raw cranberries contain roughly 0.25 mg of iron per 100 g. Dried cranberries have had most of their water removed, so the same 100 g contains about 0.39 mg. Cranberry juice and sauce also carry around 0.25–0.35 mg per 100 g, but because juice is mostly water and sauce is thick, a typical cup or half-cup serving weighs much more than a cup of raw berries.
The basic formula is:
Example: 1 cup of 100% cranberry juice weighs about 240 g. At 0.25 mg per 100 g: (240 ÷ 100) × 0.25 = 0.60 mg iron.
The density values are approximate averages pulled from standard nutrition databases and can vary slightly by brand, crop, and added ingredients. For precise label values, treat the packaged product’s Nutrition Facts panel as the strongest source.
Reference Table: Iron in Common Cranberry Servings
| Product | Iron per 100 g | Typical serving | Iron per serving |
|---|---|---|---|
| Raw cranberries | 0.25 mg | 1 cup (100 g) | 0.25 mg |
| Dried cranberries (sweetened) | 0.39 mg | 1/3 cup (40 g) | 0.16 mg |
| 100% cranberry juice | 0.25 mg | 1 cup (240 g) | 0.60 mg |
| Canned cranberry sauce | 0.35 mg | 1/2 cup (139 g) | 0.49 mg |
These are useful planning numbers, but they are estimates. If a product label lists iron per serving, use that value directly for your own tracking.
Common Mistakes to Avoid
- Comparing equal volumes as equal weights. One cup of raw cranberries is about 100 g, while one cup of cranberry juice is about 240 g. Iron per 100 g may be the same, but iron per cup is much higher for juice because you are consuming more total weight.
- Using the raw value for dried cranberries. Drying removes water and concentrates nutrients, so 100 g of dried cranberries contains more iron than 100 g of raw berries. Don’t swap values unless you have adjusted for weight.
- Forgetting that sweetened dried cranberries and sauce contain added sugar. The calculator estimates iron only; it does not account for extra calories or sugar added during processing.
- Treating 18 mg as a personal requirement. The Daily Value is a reference level for general adults; needs vary by age, sex, pregnancy, and medical conditions.
Frequently Asked Questions
Are cranberries a good source of iron? Not compared with legumes, fortified cereals, or seeds. A standard serving provides less than 5% of the Daily Value. However, cranberries can still contribute to overall intake, especially when eaten regularly with other iron sources. If you want to compare with a more concentrated plant iron source, millet contains roughly 3 mg per 100 g — more than ten times the iron density of raw cranberries.
Does the vitamin C in cranberries help iron absorption? Yes. Cranberries contain vitamin C, which can improve absorption of non-heme iron from plant foods when consumed in the same meal. Pairing cranberries with beans, spinach, or fortified grains may modestly help your body use the iron.
How should I adjust the Daily Value if I am pregnant? The iron RDA during pregnancy is about 27 mg per day, not 18 mg. To find your percentage, multiply the displayed percentage by 18 ÷ 27 ≈ 0.67. For example, 0.60 mg iron would be about 2.2% of a 27 mg target instead of 3.3% of 18 mg.
Can I use this calculator for cooked cranberry recipes? Yes, but keep in mind that cooking can remove water and change the weight. If you weighed the raw cranberries before cooking, use the raw density; if you are measuring a cooked dish, choose the sauce option as an approximation.
Where do the iron values come from? The numbers are based on standard USDA nutrient reference values for cranberries and cranberry products. For brand-level accuracy, check the product label or look up the item in USDA FoodData Central.
Real-World Applications
This calculator is useful in a few everyday situations: tracking micronutrients in a food diary, planning plant-forward meals, counseling clients who need to raise iron intake, or simply satisfying a nutrition curiosity. It is not a substitute for medical advice. If you have iron-deficiency anemia or are considering iron supplements, consult a doctor or registered dietitian rather than relying on fruit intake alone.