Yellow Onion, Raw — USDA FoodData Central nutrition facts (per 100g)

| Nutrient | Amount per 100g |
| --- | --- |
| Ash | 0.41 g |
| Biotin | 0 µg |
| Calcium, Ca | 15 mg |
| Carbohydrate, by difference | 8.61 g |
| Copper, Cu | 0.035 mg |
| Energy | 38 kcal |
| Energy | 160 kJ |
| Fiber, total dietary | 1.9 g |
| Fructose | 1.91 g |
| Glucose | 2.31 g |
| Iodine, I | 0 µg |
| Iron, Fe | 0.28 mg |
| Lactose | 0 g |
| Magnesium, Mg | 9 mg |
| Maltose | 0 g |
| Manganese, Mn | 0.144 mg |
| Phosphorus, P | 34 mg |
| Potassium, K | 182 mg |
| Protein | 0.83 g |
| Selenium, Se | 0 µg |
| Sodium, Na | 1 mg |
| Sucrose | 1.6 g |
| Sugars, Total | 5.82 g |
| Total dietary fiber (AOAC 2011.25) | 2.71 g |
| Total lipid (fat) | 0.05 g |
| Vitamin C, total ascorbic acid | 8.2 mg |
| Water | 90.1 g |
| Zinc, Zn | 0.2 mg |

Values are raw as published by USDA at the 100g basis — not rounded per 21 CFR 101.9(c) label-declaration rules, and 100g is USDA's publication basis, not a serving size any US nutrition label declares against.

Source: USDA FoodData Central, FDC ID 790646, usda_ff (released 2026-04-30). https://bettermenu.live/tools/ingredient-search/us/foods/yellow-onion-raw-790646/