Vegetables
Calories in Onion
Calories
40
kcal/100g
Protein
1.1g
per 100g
Carbs
9.3g
per 100g
Fat
0.1g
per 100g
About Onion
Onions are essential aromatics in nearly every cuisine. They contain quercetin and other antioxidants with anti-inflammatory properties.
Macro Breakdown (per 100g)
Protein
1.1g (2%)
Carbs
9.3g (3%)
Fat
0.1g (0%)
Fiber
1.7g (6%)
Calorie source split
Protein 10%Carbs 88%Fat 2%
Calories in Onion by Serving Size
| Serving | Calories | Protein | Carbs | Fat |
|---|---|---|---|---|
| 100g (standard reference)(100g) | 40 | 1.1g | 9.3g | 0.1g |
| 1 medium onion (110g)(110g) | 44 | 1.2g | 10.2g | 0.1g |
| 1/2 cup chopped (80g)(80g) | 32 | 0.9g | 7.4g | 0.1g |
Onion Diet Tags
low calorieantioxidant
Onion Nutrition — FAQs
1
How many calories in Onion per 100g?
Onion contains 40 calories per 100g, with 1.1g protein, 9.3g carbs, and 0.1g fat.
2
How many calories in 1 medium onion?
1 medium onion (110g) of Onion contains approximately 44 calories, with 1.2g protein, 10.2g carbs, and 0.1g fat.
3
Is Onion low calorie?
Yes — Onion is a low-calorie food at just 40 kcal per 100g. It's an excellent choice for weight management and calorie-controlled diets.
4
What are the macros in Onion?
Per 100g, Onion provides: 1.1g protein (10% of calories), 9.3g carbohydrates (88% of calories), and 0.1g fat (2% of calories).