How many calories are in an onion?
1 medium onion (110 g) has 44 kcal and 1.2 g of protein. Per 100 g: 40 kcal.
Values for: raw
Values are for the raw food. Cooking changes the weight (water is lost or absorbed), so always compare in the same state.
1 medium onion (110 g)
44kcal
100 g
40kcal
Nutrients per 100 g
- Protein
- 1.1 g
- Carbs
- 9.3 g
- Fat
- 0.1 g
- Fiber
- 1.7 g
- Sugars
- 4.2 g
Is it a source of protein? No, but close: only 11% of its calories come from protein, and EU labelling needs at least 12% for “source of protein” (Regulation (EC) No 1924/2006).
Servings and amounts
| Amount | kcal | Prot. | Carbs | Fat |
|---|---|---|---|---|
| 1 medium onion (110 g) | 44 | 1.2 | 10.2 | 0.1 |
| 1 large onion (150 g) | 60 | 1.7 | 14 | 0.2 |
| 1 tablespoon, chopped (10 g) | 4 | 0.1 | 0.9 | 0 |
| 50 g | 20 | 0.6 | 4.7 | 0.1 |
| 100 g | 40 | 1.1 | 9.3 | 0.1 |
| 200 g | 80 | 2.2 | 18.6 | 0.2 |
Household servings are the weights given by the same source; the rest is scaled from 100 g. Weigh something else and the app does the maths.
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Frequently asked questions
How many calories are in an onion?
1 medium onion (110 g) has 44 kcal and 1.2 g of protein. Per 100 g: 40 kcal. Values for: raw.
How much protein is in an onion?
1 medium onion (110 g): 1.2 g of protein. Per 100 g, 1.1 g, with 9.3 g of carbs and 0.1 g of fat. Is it a source of protein? No, but close: only 11% of its calories come from protein, and EU labelling needs at least 12% for “source of protein” (Regulation (EC) No 1924/2006).
What are the macros of an onion?
Per 100 g: 1.1 g of protein, 9.3 g of carbs (4.2 g of sugars), 0.1 g of fat and 1.7 g of fiber.
Are these values raw or cooked?
Values are for the raw food. They are for onion: raw. Cooking changes the weight (water is lost or absorbed), so always compare in the same state.
Is an onion fattening?
No single food makes you gain weight on its own: the day’s total does. 1 medium onion (110 g): 44 kcal, 2% of the 2,000 kcal used as the reference on food labels.
How do I know how much is on my plate without weighing it?
Eyeballing it is where manual counting breaks. With a photo, Renzy estimates the amount and the calories, and you correct whatever needs it.
More vegetables
Calories in dishes made with it
Source
USDA FoodData Central (SR Legacy), entry 170000
A specific product varies with variety, brand and cooking. If yours has a label, the label wins.
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