EatSeeNutrition information: onion
| Nutrient | Carbs 100 g | % RI* | Medium onion (110 g) |
|---|---|---|---|
| Energy | 40 kcal167 kJ | 2% | 44 kcal184 kJ |
| Fat | 0.1 g | 0% | 0.1 g |
| of which saturated fatty acids | 0 g | 0% | 0 g |
| Carbs | 7.6 g | 3% | 8.4 g |
| of which sugars | 4.2 g | 5% | 4.6 g |
| Fiber | 1.7 g | - | 1.9 g |
| Protein | 1.1 g | 2% | 1.2 g |
| Salt | 0.01 g | 0% | 0.01 g |
| Water | 89.1 g | - | 98 g |
* RI = reference intake for an average adult (8400 kJ / 2000 kcal). Carbs exclude fiber, as shown on EU food labels.
How many calories are in an onion?
Calories and macronutrients in typical servings. Use the calculator at the top of the page to calculate a different weight.
| Serving | Calories | Protein | Carbs | Fat |
|---|---|---|---|---|
| 1 tablespoon of chopped onion10 g | 4 kcal | 0.1 g | 0.8 g | <0.1 g |
| Small onion70 g | 28 kcal | 0.8 g | 5.3 g | 0.1 g |
| 100 g | 40 kcal | 1.1 g | 7.6 g | 0.1 g |
| Medium onion110 g | 44 kcal | 1.2 g | 8.4 g | 0.1 g |
Vitamins and minerals
Per 100 g, onion is highest in folate (10% RI), vitamin C (9%), and vitamin B6 (9%). We show nutrients that provide at least 2% of the RI per 100 g.
| Nutrient | Carbs 100 g | % RI |
|---|---|---|
| Potassium | 146 mg | 7% |
| Calcium | 23 mg | 3% |
| Magnesium | 10 mg | 3% |
| Phosphorus | 29 mg | 4% |
| Zinc | 0.2 mg | 2% |
| Vitamin C | 7.4 mg | 9% |
| Vitamin B1 (thiamin) | 0.05 mg | 5% |
| Vitamin B2 (riboflavin) | 0.03 mg | 2% |
| Vitamin B6 | 0.12 mg | 9% |
| Folate | 19 µg | 10% |
Onion compared with other foods
Onion has more calories per 100 g than 64% of the vegetables in our chart. Here’s how foods in the vegetables category with similar calorie counts compare (kcal per 100 g):
- Yellow bell pepper27 kcal
- Red cabbage31 kcal
- Red bell pepper31 kcal
- Broccoli34 kcal
- Onion40 kcal
- Carrot41 kcal
- Canned corn67 kcal
- Raw potatoes77 kcal
- Raw sweet potato86 kcal
Onion in meal plans
You’ll find this food in ready-made meal plans for 7 days, with recipes and a shopping list:
- 1200-kcal meal plan - day 2: split pea soup with smoked paprika
- 1500 kcal meal plan - day 1: turkey meatballs in tomato sauce with pearl barley
- 1800 kcal meal plan - day 1: red lentil dal with rice
- 2000-kcal meal plan - day 2: spaghetti with lentils in tomato sauce
Recipes with this ingredient
- Chili sin carne with brown rice – about 650 kcal per serving
- Chickpea and spinach curry with millet – about 610 kcal per serving
- Red lentil dal with rice - about 622 kcal per serving
- Polish-style baked beans with sausage (fasolka po bretońsku) — about 566 kcal per serving
- Split pea soup with smoked paprika - about 531 kcal per serving
- Creamy pumpkin soup with red lentils and seeds - about 551 kcal per serving
Find more ideas in recipes with calories and macros.
FAQs
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Data source: USDA FoodData Central, SR28 database - “Onions, raw” (NDB 11282). Polish names and serving sizes: EatSee editorial team. Values are estimates and may vary by variety, size, and preparation method. For packaged products, refer to the label for exact information. This page is for informational purposes only and is not a substitute for advice from a doctor or dietitian. Updated: . How we prepare our calorie chart.