Nutrition facts per 100 g
Macros in Onion
Onion has about 8 calories per 100 g, with 0.4 g protein, 0.1 g fat and 1.6 g carbs.

- Protein
- 0.4 g
- Fat
- 0.1 g
- Carbs
- 1.6 g
Serving size calculator
Nutrition table
| Portion | Calories | Protein | Fat | Carbs |
|---|---|---|---|---|
| 100 g | 8 kcal | 0.4 g | 0.1 g | 1.6 g |
| 1 cup (100 g) | 8 kcal | 0.4 g | 0.1 g | 1.6 g |
| 50 g | 4 kcal | 0.2 g | 0.1 g | 0.8 g |
| 200 g | 16 kcal | 0.8 g | 0.2 g | 3.2 g |
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Open FoodWarzHow long to burn onion calories?
A 100 g portion is about 8 calories, roughly 2 minutes of brisk walking for many adults.
What changes the calories?
Oil, sauces, sugar, toppings, cooking method and portion weight can change onion calories quickly.
FAQ
How many calories are in onion?
Onion has about 8 calories per 100 g. A typical cup (100 g) has about 8 calories.
How much protein is in onion?
Onion has about 0.4 g protein per 100 g and about 0.4 g protein per cup.
Is onion good for calorie tracking?
Yes, as long as you track portion size. The biggest source of error is usually weight, sauces, oil and mixed ingredients.
Related foods
Nutrition values are practical estimates for calorie tracking, not medical advice.