Nutrition facts per 100 g
| Energy | 40 kcal |
|---|---|
| Protein | 1.1 g |
| Carbohydrates | 9.3 g |
| – of which sugars | 4.2 g |
| Fat | 0.1 g |
| – of which saturates | 0 g |
| Fibre | 1.7 g |
| Salt | 0 g |
Vitamins and minerals (100 g)
| Calcium | 23 mg |
|---|---|
| Potassium | 146 mg |
| Vitamin C | 7.4 mg |
Calories per serving
| Serving | Weight | kcal | Protein |
|---|---|---|---|
| 1 piece (100 g) | 100 g | 40 kcal | 1.1 g |
Where does the energy come from?
- 10% Protein
- 88% Carbohydrates
- 2% Fat
About 10% of the energy comes from protein, 88% from carbohydrates and 2% from fat.
The energy density is low: even a large portion of onion has few calories, so it works well for keeping you full.
Frequently asked questions
How many calories are in 100 g of onion?
100 g of onion has 40 kcal. For example, 1 piece (100 g) has about 40 kcal.
How much protein is in 100 g of onion?
100 g contains 1.1 g of protein, which is about 10% of the energy.
Is onion good for weight loss?
The energy density is low: even a large portion of onion has few calories, so it works well for keeping you full. What matters most is your total daily energy: log the portion in the food diary and you will see right away how it fits your calorie target.
What is RestinCal?
RestinCal is a free food diary and calorie counter made in Finland. Its maker lost almost 40 kilos by logging his meals, and the service is built for the same everyday use:
- Food diary: search a food by name or scan the barcode, and calories and macros are calculated for you.
- The BMR calculator and macro calculator give you a calorie target and your protein, carb and fat goals.
- The recipe nutrition calculator works out calories per serving, and more than 50 other calculators help with everyday questions.
- A shared food database grows with products added by users, and RestinBot helps you get started.