Calories in Onion
44 kcal per 1 medium (110 g) ·40 kcal per 100 g
A serving of onion (1 medium, 110 g) has 44 calories, with 1.2 g protein, 10.2 g carbohydrate, 0.1 g fat and 1.9 g fibre. 100 g has 40 calories.
Nutrition facts
| Nutrient | Per 100 g | Per serving |
|---|---|---|
| Calories | 40 kcal | 44 kcal |
| Protein | 1.1 g | 1.2 g |
| Carbohydrate | 9.3 g | 10.2 g |
| Fat | 0.1 g | 0.1 g |
| Fibre | 1.7 g | 1.9 g |
Serving shown: 1 medium (110 g). Values are reference estimates.
Calorie split
- Protein
- 10%
- Carbs
- 88%
- Fat
- 2%
Calories per serving
- 1 medium (110 g)44 kcal
- 1 tbsp chopped (10 g)4 kcal
Common questions
- How many calories are in onion?
- A serving of onion (1 medium, 110 g) has 44 calories, with 1.2 g protein, 10.2 g carbohydrate, 0.1 g fat and 1.9 g fibre. 100 g has 40 calories.
- How many calories are in 100 g of onion?
- 100 g of onion has 40 calories: 1.1 g protein, 9.3 g carbohydrate, 0.1 g fat and 1.7 g fibre.
- How much protein is in onion?
- There are 1.2 g of protein in 1 medium (110 g) (1.1 g per 100 g). 10% of its calories come from protein, so it's mostly carbohydrate.
- How many calories are in other portions of onion?
- 1 tbsp chopped (10 g): 4 kcal.
Values per 100 g come from USDA FoodData Central and standard food-composition tables; per-portion figures are calculated from them. Brands and recipes vary, so check the label when you have one.