USDA-derived generic food data
What is the nutrition score of Onion?
Per 100g, Onion has a Daily Nutrient Contribution score of 4/100. Its strongest contributions are Vitamin C, Folate, Vitamin B6. Treat this as a fixed nutrient comparison, not a personal recommendation.
Reviewed 16 July 2026. USDA-derived values are estimates for a generic food and can vary with preparation and brand.
Daily Nutrient Contribution
4/100
1 nutrients provide at least 10% of the daily reference used for this comparison.
Nutrition facts
The same generic food data, shown per 100g and for 1 medium (110g).
| Nutrient | Per 100g | Per 1 medium |
|---|---|---|
| Calories | 40 kcal | 44 kcal |
| Protein | 1 g | 1 g |
| Carbs | 9 g | 10 g |
| Fat | 0 g | 0 g |
| Fiber | 2 g | 2 g |
| Sat fat | 0 g | 0 g |
| Sodium | 4 mg | 4 mg |
| Potassium | 146 mg | 161 mg |
| Calcium | 23 mg | 25 mg |
| Iron | 0.2 mg | 0.2 mg |
| Magnesium | 10 mg | 11 mg |
| Zinc | 0.2 mg | 0.2 mg |
| Vitamin C | 7 mg | 8 mg |
| Vitamin D | 0 µg | 0 µg |
| Vitamin B12 | 0 µg | 0 µg |
| Folate | 19 µg | 21 µg |
Where Onion contributes most
These percentages are capped at 100% for the score calculation. They use a fixed adult reference and are not personalised targets.
Vitamin C
19%
7 mg per 100g
Folate
10%
19 µg per 100g
Vitamin B6
9%
0.1 mg per 100g
Fiber
6%
2 g per 100g
Sat fat
0 g per 100g
Shown separately because the score focuses on positive daily nutrient contributions.
Sodium
4 mg per 100g
Shown separately because the score focuses on positive daily nutrient contributions.
Source and limits
This page uses Nutrigate's USDA FoodData Central-derived generic-food table. It is useful for comparison, while the label on a branded product is more specific. Nutrition information is not medical advice.
Find Onion in USDA FoodData CentralCompare related foods
These foods have similar nutrient contribution patterns in the same fixed comparison.