Calories in Onion
Onion contains 40 kcal per 100 g. A typical serving — 1 onion (110 g) — carries about 44 kcal.
The base of Bulgarian cooking; its calories in a dish are negligible.
Nutrition facts
| Nutrient | Per 100 g | Per serving — 1 onion (110 g) |
|---|---|---|
| Calories | 40 kcal | 44 kcal |
| Protein | 1.1 g | 1.2 g |
| Fat | 0.1 g | 0.1 g |
| Carbohydrates | 9 g | 9.9 g |
| Fibre | 1.7 g | 1.9 g |
| Sugars | 4.2 g | 4.6 g |
How much exercise burns one serving?
~11 minutes
~4 minutes
Approximate, for a ~44 kcal serving and a ~70 kg adult (walking ~4 kcal/min, running ~10 kcal/min).
Frequently asked questions
How many calories are in onion?
Onion contains 40 kcal per 100 g. A typical serving — 1 onion (110 g) — carries about 44 kcal.
How much protein, fat and carbohydrate does onion have?
Per 100 g: 1.1 g protein, 0.1 g fat and 9 g carbohydrates, of which 1.7 g fibre and 4.2 g sugars.
Is onion suitable for a diet?
Yes — at 40 kcal per 100 g, onion is a low-calorie food that fits easily into a weight-loss plan. The base of Bulgarian cooking; its calories in a dish are negligible.
How much does one serving of onion weigh?
The typical serving is 1 onion (110 g) — about 110 g, which equals ~44 kcal.
How much exercise burns one serving of onion?
Roughly 11 minutes of brisk walking or 4 minutes of running (approximate, for a ~70 kg adult: walking ~4 kcal/min, running ~10 kcal/min).
More from “Vegetables”
Values are rounded average reference figures per 100 g/ml (USDA FoodData Central and European food-composition tables). Real values vary with variety, recipe and preparation — the label of a specific product always takes precedence. This information is not medical or dietary advice.