Calories in Onion
44kcal per 1 medium onion (110 g)
40 kcal per 100 g · about 2% of a 2,000-kcal day
Onions add flavor to nearly any dish for around 44 calories per whole onion — the oil they are cooked in is what adds up.
Onion nutrition facts
| Nutrient | Per 100 g | Per 1 medium onion |
|---|---|---|
| Calories | 40 kcal | 44 kcal |
| Protein | 1.1 g | 1.2 g |
| Carbs | 9.3 g | 10.2 g |
| Fat | 0.1 g | 0.1 g |
| Fiber | 1.7 g | 1.9 g |
| Sugar | 4.2 g | 4.6 g |
Where the calories come from
Protein 10% Carbs 88% Fat 2%
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