Onion
Categories
Cooking method
| Macros | per 100 g |
|---|---|
| Calories | 35 kcal |
| Protein | 1.1 g |
| Fat | 0.1 g |
| Carbs | 7.3 g |
Onion is a bulb vegetable eaten raw or cooked, and it serves as a foundational aromatic in cuisines worldwide — sliced into salads, caramelised as a base for sauces, or pickled as a condiment. Per 100 g, raw onion provides 35 kcal, 1.1 g of protein, 0.1 g of fat, 7.3 g of carbohydrates and 1.9 g of dietary fibre, with 4.2 g coming from naturally occurring sugars. It contributes 150 mg of potassium, 7.4 mg of vitamin C and 16 mcg of folate per 100 g. No glycemic index value is available for raw onion. Suitable for vegan, vegetarian, pescatarian, gluten-free, dairy-free, keto, paleo and Mediterranean dietary patterns.
How many calories in an onion?
Raw onion contains 35 kcal per 100 g. A medium onion weighs around 110 g, putting it at roughly 38 kcal per whole onion.
How much vitamin C is in an onion?
Raw onion provides 7.4 mg of vitamin C per 100 g. Note that cooking reduces vitamin C content, so raw preparations retain more of this nutrient.
Is onion keto-friendly?
Onion is listed as keto-compatible, with 7.3 g of carbohydrates per 100 g. Portion size matters on a strict keto diet, so most people use onion as a flavouring rather than a main ingredient to keep net carbs in check.
Diets
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Glycemic Index
approximateMacros · per 100 g
| Macros | Amount |
|---|---|
| Calories | 35.0 kcal |
| Protein | 1.1 g |
| Fat | 0.10 g |
| Carbs | 7.3 g |
| Sugars | 4.2 g |
| Fiber | 1.9 g |
| Starch | 0 g |
| Fats breakdown | Amount |
|---|---|
| Saturated | 0.017 g |
| Monounsaturated | 0.013 g |
| Polyunsaturated | 0.025 g |
| Trans | 0 g |
| Omega-3 | 0 g |
| Omega-6 | 0.020 g |
| Cholesterol | 0 mg |
| Minerals | Amount |
|---|---|
| Calcium | 22.0 mg |
| Iron | 0.30 mg |
| Magnesium | 10.0 mg |
| Phosphorus | 31.4 mg |
| Potassium | 150 mg |
| Sodium | 8.0 mg |
| Zinc | 0.17 mg |
| Copper | 0.044 mg |
| Manganese | 0.13 mg |
| Selenium | 0.40 mcg |
| Iodine | 0.20 mcg |
| Vitamins | Amount |
|---|---|
| Vitamin A | 2.0 mcg |
| Retinol | 0 mcg |
| Vitamin C | 7.4 mg |
| Vitamin D | 0 mcg |
| Vitamin E | 0.060 mg |
| Vitamin K | 0.40 mcg |
| Thiamin (B1) | 0.030 mg |
| Riboflavin (B2) | 0.027 mg |
| Niacin (B3) | 0.17 mg |
| Pantothenic acid (B5) | 0.10 mg |
| Vitamin B6 | 0.075 mg |
| Folate (B9) | 16.0 mcg |
| Vitamin B12 | 0 mcg |
| Choline | 5.5 mg |
Other cooking states of Onion
Cooked onion (43 kcal).
