Yellow onion: calories and nutrition facts
Yellow onion has 36 kcal per 100 g. One serving, 1 Onion (150 g), has 54 kcal.
- Calories
- 36 kcal
- Protein
- 1.2 g
- Carbohydrates
- 6.4 g
- Fat
- 0.5 g
Per 100 g
Yellow onion: how many calories?
Yellow onion has 36 kcal per 100 g, with 1.2 g protein, 6.4 g carbs and 0.5 g fat. A 150 g serving (1 Onion) has 54 kcal. That is less than the average for Fruits & Veggies (109 kcal per 100 g). Most of its calories come from carbohydrates.
Where the calories come from
- Protein14%
- Carbohydrates73%
- Fat13%
Calculate a portion
- Calories
- 54 kcal
- Protein
- 1.8 g
- Carbohydrates
- 9.6 g
- Fat
- 0.8 g
Nutrition facts
| Nutrient | Per 100 g | Per serving (150 g) |
|---|---|---|
| Calories | 36 kcal | 54 kcal |
| Fat | 0.5 g | 0.8 g |
| of which saturated fat | 0 g | 0 g |
| Carbohydrates | 6.4 g | 9.6 g |
| of which sugars | 0.2 g | 0.3 g |
| Fiber | 2.6 g | 3.9 g |
| Protein | 1.2 g | 1.8 g |
| Sodium | 5 mg | 8 mg |
| Water | 89 g | 133.5 g |
| Vitamin C | 2.1 mg | 3.1 mg |
| Calcium | 13 mg | 20 mg |
| Iron | 0.1 mg | 0.2 mg |
| Potassium | 150 mg | 225 mg |
| Magnesium | 5 mg | 8 mg |
Source: Ciqual food composition table (ANSES, France). Data updated on 2 September 2026.
Share of reference intakes
Per 100 g, compared with an adult's reference intakes (2,000 kcal a day, Regulation (EU) No 1169/2011).
| Nutrient | Of reference intake |
|---|---|
| Calories(36 kcal) | 2% |
| Fat(0.5 g) | 1% |
| of which saturated fat(0 g) | 0% |
| Carbohydrates(6.4 g) | 2% |
| of which sugars(0.2 g) | 0% |
| Protein(1.2 g) | 2% |
| Salt(0.01 g) | 0% |
What the EU thresholds say
Nutrition claim thresholds from Regulation (EC) No 1924/2006, per 100 g.
- Low energy (40 kcal or less)
- Source of protein (at least 12% of calories)
- Low fat (3 g or less)
- Low sugars (5 g or less)
- Low sodium (120 mg or less)
Yellow onion: frequently asked questions
Yellow onion: how many calories per serving?
A 150 g serving (1 Onion) has 54 kcal.
Yellow onion: how much protein?
Yellow onion contains 1.2 g of protein per 100 g, 2% of the 50 g reference intake.
Yellow onion: how much fibre?
Yellow onion provides 2.6 g of fibre per 100 g, 10% of the 25 g a day recommended by EFSA.
Yellow onion: how much makes 100 kcal?
100 kcal is about 279 g of this food.
Recipes with this food
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- Yellow bell pepper29 kcal
- Yellow nectarine50 kcal
- Yellow peach45 kcal
- Yellow pomelo0 kcal
- Young coconut360 kcal
- Zucchini17 kcal
- Zucchini puree57 kcal
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