Onion, raw: potassium, phosphorus and sodium
One serving of onion, raw (1/2 cup, chopped, 80 g) has about 117 mg potassium, 23 mg phosphorus, 3 mg sodium and 0.9 g protein, according to USDA FoodData Central (FDC id 170000).
Nutrients per serving and per 100 g
| Nutrient | Per serving (80 g) | Per 100 g |
|---|---|---|
| Potassium (mg) | 117 | 146 |
| Phosphorus (mg) | 23 | 29 |
| Sodium (mg) | 3 | 4 |
| Protein (g) | 0.9 | 1.1 |
| Energy (kcal) | 32 | 40 |
Source
- USDA description
- Onions, raw
- USDA FDC id
- 170000 (opens the USDA record)
- Dataset
- USDA FoodData Central - SR Legacy (CSV), release 2018-04
- USDA category
- Vegetables and Vegetable Products
- License
- Public domain (CC0 1.0)
How this compares with published guidance
Under 200 mg At 117 mg potassium per serving, this is under the 200 mg line that the National Kidney Foundation (Potassium in Your CKD Diet, updated May 5, 2023) uses for its comparison "low" column.
The 200 mg line applies to a serving, and the serving here is the USDA household portion listed above, which may not match the serving size used on other lists. NKF gives no daily potassium target. Your own limit comes from your care team.
Phosphorus. NKF (Phosphorus and Your CKD Diet) gives no per-serving cutoff, so no label is applied to 23 mg. See where it sits on the phosphorus ranking.
Phosphorus additives matter for processed versions: NKF says phosphorus from additives is completely absorbed. A prepared or packaged version of this food may differ from the USDA value above.
USDA portions
| Portion | Grams | Potassium (mg) | Phosphorus (mg) | Sodium (mg) |
|---|---|---|---|---|
| 1/2 cup, chopped standard serving | 80 | 117 | 23 | 3 |
| 1 cup, chopped | 160 | 234 | 46 | 6 |
| 1 cup, sliced | 115 | 168 | 33 | 5 |
| 1 tbsp chopped | 10 | 15 | 3 | 0 |
| 1 large | 150 | 219 | 44 | 6 |
| 1 slice, large (1/4" thick) | 38 | 55 | 11 | 2 |
| 1 medium (2-1/2" dia) | 110 | 161 | 32 | 4 |
| 1 slice, medium (1/8" thick) | 14 | 20 | 4 | 1 |
Similar foods in vegetables
Closest potassium per serving within the same food group. Different serving sizes, so compare the grams too.