Onion — Calories and Macros
Yellow onion, raw. Cooking concentrates the sugar.
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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Common questions
How many calories are in onion?
1 medium (~110g) of onion has 44 calories, with 1.2g protein, 10g carbs, and 0.1g fat.
How much protein is in onion?
Onion has 1.2g of protein per 1 medium (~110g). That is about 3g per 100 calories, not a significant source of protein.
Is onion good for weight loss?
Any food can fit a weight-loss diet, because your total daily calories decide the result, not one food. Onion is relatively light for its portion, so it fits comfortably within most calorie targets.
Is onion healthy?
Healthy depends on the rest of your day, not one food. In a balanced diet at your calorie target, onion is fine; the portion and how often you eat it matter more than the food itself.
Nutrition values approximated from USDA FoodData Central. Estimates for tracking, not medical reference. Reviewed against USDA FoodData Central.