Food · Vegetables and Vegetable Products
Yellow onions nutrition facts
A typical portion of yellow onions (1 Onion Edible; 143 g, raw) has 50 calories and 1g of protein (USDA FoodData Central). USDA lists 2 descriptions of it: per 100 g they range from 38 calories (raw) to 123 (sauteed).
Nutrition Facts
* The % Daily Value (DV) tells you how much a nutrient in a serving of food contributes to a daily diet. 2,000 calories a day is used for general nutrition advice. Protein % DV here is not corrected for protein quality.
USDA values per 100 g for Onions, yellow, raw, scaled to the portion. Check the USDA record.
- Protein per 100 g
- 0.8g
- more than 14% of 8,218 USDA reference foods
- Calories per 100 g
- 38
- more than 10% of reference foods
- Sodium per 100 g
- 1mg
- more than 4% of reference foods
1 Onion Edible weighs 143 g in USDA's record for Onions, yellow, raw (FDC 790646).
Where the calories come from: 90% carbohydrate, 1% fat and 9% protein (4 calories a gram of protein or carbohydrate, 9 of fat).
Also rich in
- Vitamin C12 mg in 1 Onion Edible (143 g), 13% of the Daily Value
Source: USDA FoodData Central (FDC 790646), every nutrient the record reports; FDA Daily Values, 21 CFR 101.9.
Every form of yellow onions USDA describes
Sauteed has the most calories per 100 g (123); the fewest: Raw (38)
| USDA description | Calories | Protein | Fat | Sodium |
|---|---|---|---|---|
| Onions, yellow, raw | 38 | 0.8 g | 0.1 g | 1 mg |
| Onions, yellow, sauteed | 123 | 1 g | 10.8 g | 12 mg |
Every nutrient in this record (29)
The portion is 1 Onion Edible (143 g); % DV is for that portion.
Energy, macronutrients and sugars (12)
| Nutrient | Per portion | Per 100 g | % DV |
|---|---|---|---|
| Protein | 1.19 g | 0.83 g | 2% |
| Total lipid (fat) | 0.072 g | 0.050 g | 0% |
| Carbohydrate, by difference | 12.3 g | 8.61 g | 4% |
| Ash | 0.59 g | 0.41 g | |
| Energy | 54.3 kcal | 38.0 kcal | |
| Sucrose | 2.29 g | 1.60 g | |
| Glucose | 3.30 g | 2.31 g | |
| Fructose | 2.73 g | 1.91 g | |
| Lactose | 0 g | 0 g | |
| Maltose | 0 g | 0 g | |
| Water | 129 g | 90.1 g | |
| Fiber, total dietary | 2.72 g | 1.90 g | 10% |
Minerals (11)
| Nutrient | Per portion | Per 100 g | % DV |
|---|---|---|---|
| Calcium, Ca | 21.4 mg | 15.0 mg | 2% |
| Iron, Fe | 0.40 mg | 0.28 mg | 2% |
| Magnesium, Mg | 12.9 mg | 9.00 mg | 3% |
| Phosphorus, P | 48.6 mg | 34.0 mg | 4% |
| Potassium, K | 260 mg | 182 mg | 6% |
| Sodium, Na | 1.43 mg | 1.00 mg | 0% |
| Zinc, Zn | 0.29 mg | 0.20 mg | 3% |
| Copper, Cu | 0.050 mg | 0.035 mg | 6% |
| Iodine, I | 0 µg | 0 µg | |
| Manganese, Mn | 0.21 mg | 0.14 mg | 9% |
| Selenium, Se | 0 µg | 0 µg | 0% |
Vitamins (2)
| Nutrient | Per portion | Per 100 g | % DV |
|---|---|---|---|
| Vitamin C, total ascorbic acid | 11.7 mg | 8.20 mg | 13% |
| Biotin | 0 µg | 0 µg |
Source: USDA FoodData Central, FDC 790646: every value the record reports, per 100 g as USDA gives it and scaled to the portion; Daily Values: 21 CFR 101.9.
Source: USDA FoodData Central (SR Legacy, Foundation Foods and Survey foods), April 30, 2026 release.
Questions
How many calories are in yellow onions?
50 in 1 Onion Edible (143 g) of raw; 38 to 123 per 100 g across USDA's descriptions.
How much protein is in yellow onions?
1g in 1 Onion Edible; 0.8 g per 100 g.
How much sodium is in yellow onions?
0mg in 1 Onion Edible; 1 mg per 100 g. Salt added in cooking changes it: USDA lists salted and unsalted forms separately where it measured both.
Sources for this page
- USDA FoodData Central
- the food and product records, April 30, 2026 release. fdc.nal.usda.gov
- FoodData Central documentation
- what each data type is and how branded records are submitted. fdc.nal.usda.gov
- USDA Food and Nutrient Database for Dietary Studies
- the survey foods and their portions. ars.usda.gov
- 21 CFR 101.9, Nutrition labeling of food
- the label format, rounding and Daily Values. ecfr.gov
- FDA, How to Understand and Use the Nutrition Facts Label
- the 5% and 20% Daily Value rule. fda.gov