Food Library / Vegetables

Onion

Calories, protein, carbohydrates, fat and available nutrients for onion. Compare 100 g or calculate your own amount.

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Reference values for the food and preparation listed. Weigh only the edible portion.

Showing values for 100 g

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Calories & macros

Calories: 40 kcal
Protein: 1.1 g
Carbohydrates: 9.3 g
Fat: 0.1 g

Other nutrients

Fiber: 1.7 g
Total sugars: 4.2 g

Minerals

Sodium: 4 mg
Potassium: 146 mg
Calcium: 23 mg
Iron: 0.2 mg

Food source and preparation

Onions, raw

USDA SR Legacy, April 2018 · FDC ID 170000. Selected on 6 October 2026.

View the USDA source record

Figures describe an average reference food. Use the label when working with a specific brand. Cooking changes water content, so a raw weight and a cooked weight are not interchangeable.

Everyday food. A little more understanding.
General nutrition information and estimates, not individual medical advice.