Onion — Calories and Macros

Yellow onion, raw. Cooking concentrates the sugar.

44cal

per 1 medium (~110g)
2% of a 2,000 cal day

Protein

1.2g

Carbs

10g

Fat

0.1g

Fiber

1.9g

Sugar

4.7g

Per 100 grams

Standardized to 100g so you can compare across foods.

Calories

40

Protein

1.1g

Carbs

9.1g

Fat

0.1g

Fiber

1.7g

Sugar

4.3g

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Related foods

Vegetables

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4 cal · 0.2g protein

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22 cal · 1.1g protein

Nutrition values approximated from USDA FoodData Central. Estimates for tracking, not medical reference. Updated 2026-05-21.