Calories in Onions, cooked, boiled, drained, with salt
Generic food Cooked Vegetables
Onions, cooked, boiled, drained, with salt contains 42 kcal per 100 g. A typical serving of 1 slice medium, 1/8" thick (12 g) provides about 5 kcal.
Roughly 84% of its calories come from carbohydrates, with 12% from protein and 4% from fat (estimated with general energy factors).
That is more energy than the typical item in vegetables and vegetable products on FoodFactly, where the median is 35 kcal per 100 g across 866 foods.
These values are for the cooked food. Raw and other preparations have their own values, listed separately below.
The data comes from USDA FoodData Central: SR Legacy.
Nutrition facts
| Nutrient | Amount per 100 g | % DV |
|---|---|---|
| Calories C | 42 kcal | |
| Total fat ? | 0.19 g | 0.2% |
| Saturated fat ? | 0.031 g | 0.2% |
| Trans fat Z | 0 g | |
| Cholesterol Z | 0 mg | 0% |
| Sodium ? | 239 mg | 10% |
| Total carbohydrates C | 9.6 g | 3% |
| Dietary fiber ? | 1.4 g | 5% |
| Total sugars I | 4.7 g | |
| Protein ? | 1.4 g | 3% |
| Vitamin A C | 0 µg | 0% |
| Vitamin C ? | 5.2 mg | 6% |
| Vitamin D Z | 0 µg | 0% |
| Vitamin E I | 0.02 mg | 0.1% |
| Vitamin K I | 0.5 µg | 0.4% |
| Thiamin (B1) ? | 0.042 mg | 4% |
| Riboflavin (B2) ? | 0.023 mg | 2% |
| Niacin (B3) ? | 0.17 mg | 1% |
| Pantothenic acid (B5) ? | 0.11 mg | 2% |
| Vitamin B6 ? | 0.13 mg | 8% |
| Folate (B9) C | 15 µg | 4% |
| Vitamin B12 Z | 0 µg | 0% |
| Choline C | 6.8 mg | 1% |
| Calcium ? | 22 mg | 2% |
| Iron ? | 0.24 mg | 1% |
| Magnesium ? | 11 mg | 3% |
| Phosphorus ? | 35 mg | 3% |
| Potassium ? | 166 mg | 4% |
| Zinc ? | 0.21 mg | 2% |
| Copper ? | 0.067 mg | 7% |
| Manganese ? | 0.15 mg | 7% |
| Selenium I | 0.6 µg | 1% |
% DV: percent of the FDA Daily Value for adults (reference amounts). Letters show how each value was obtained: M measured, C calculated, L label, Z assumed zero, I imputed. Vitamins and minerals not listed were not reported by the source.
Nutritional breakdown
- Protein 12%
- Carbohydrates 84%
- Fat 4%
Approximate share of calories, using general energy factors (4 kcal/g protein and carbohydrate, 9 kcal/g fat, 7 kcal/g alcohol).
Vitamins and minerals, % Daily Value per 100 g
Nutritional insights
- Protein1.4 gbelow the median for vegetables and vegetable products (median 2 g)
- Fiber1.4 gin the lowest quarter of vegetables and vegetable products (median 2.2 g)
- Sugars4.7 gin the top quarter of vegetables and vegetable products (median 2.3 g)
- Fat0.19 gbelow the median for vegetables and vegetable products (median 0.3 g)
- Saturated fat0.031 gbelow the median for vegetables and vegetable products (median 0.052 g)
- Sodium239 mgabove the median for vegetables and vegetable products (median 36 mg)
- Protein per 100 kcal3.2 gprotein density, useful for comparing foods with different calorie levels
- Water87.9 gwater per 100 g, which largely explains differences between raw, cooked and dried forms
Full nutrient profile
Fats and cholesterol (2)
| Monounsaturated fat ? | 0.027 g |
|---|---|
| Polyunsaturated fat ? | 0.073 g |
Amino acids (18)
| Tryptophan ? | 0.02 g |
|---|---|
| Threonine ? | 0.033 g |
| Isoleucine ? | 0.048 g |
| Leucine ? | 0.048 g |
| Lysine ? | 0.065 g |
| Methionine ? | 0.011 g |
| Cystine ? | 0.024 g |
| Phenylalanine ? | 0.035 g |
| Tyrosine ? | 0.034 g |
| Valine ? | 0.031 g |
| Arginine ? | 0.18 g |
| Histidine ? | 0.022 g |
| Alanine ? | 0.038 g |
| Aspartic acid ? | 0.074 g |
| Glutamic acid ? | 0.22 g |
| Glycine ? | 0.057 g |
| Proline ? | 0.042 g |
| Serine ? | 0.04 g |
Individual fatty acids (19)
| EPA (omega-3, 20:5 n-3) ? | 0 g |
|---|---|
| DHA (omega-3, 22:6 n-3) ? | 0 g |
| Linoleic acid (omega-6, 18:2) ? | 0.07 g |
| SFA 4:0 ? | 0 g |
| SFA 6:0 ? | 0 g |
| SFA 8:0 ? | 0 g |
| SFA 10:0 ? | 0 g |
| SFA 12:0 ? | 0 g |
| SFA 14:0 ? | 0.001 g |
| SFA 16:0 ? | 0.028 g |
| SFA 18:0 ? | 0.002 g |
| MUFA 18:1 ? | 0.027 g |
| PUFA 18:3 ? | 0.004 g |
| PUFA 20:4 ? | 0 g |
| MUFA 16:1 ? | 0 g |
| PUFA 18:4 ? | 0 g |
| MUFA 20:1 ? | 0 g |
| MUFA 22:1 ? | 0 g |
| PUFA 22:5 n-3 (DPA) ? | 0 g |
Carotenoids (7)
| Beta-carotene C | 1 µg |
|---|---|
| Lycopene C | 0 µg |
| Lutein + zeaxanthin C | 4 µg |
| Retinol Z | 0 µg |
| Carotene, alpha C | 0 µg |
| Vitamin D (D2 + D3), International Units Z | 0 IU |
| Cryptoxanthin, beta C | 0 µg |
Sterols (1)
| Phytosterols ? | 18 mg |
|---|
Other components (11)
| Water ? | 87.9 g |
|---|---|
| Alcohol ? | 0 g |
| Caffeine Z | 0 mg |
| Ash M | 1 g |
| Theobromine Z | 0 mg |
| Energy C | 176 kJ |
| Vitamin A, IU C | 2 IU |
| Folic acid Z | 0 µg |
| Folate, food ? | 15 µg |
| Vitamin E, added Z | 0 mg |
| Vitamin B-12, added Z | 0 µg |
Other forms of Onions
Raw, cooked, dried and processed versions are separate records with their own measured values.
| Food | Calories | Protein | Carbs | Fat |
|---|---|---|---|---|
| Onion, raw Raw | 40 | 1.1 g | 9.3 g | 0.1 g |
| Onions, cooked, boiled, drained, without salt Cooked | 44 | 1.4 g | 10.2 g | 0.19 g |
| Onions, dehydrated flakes Dried or dry | 349 | 9 g | 83.3 g | 0.46 g |
| Onions, canned, solids and liquids Canned | 19 | 0.85 g | 4 g | 0.09 g |
| Onions, yellow, sauteed Cooked | 123 | 0.95 g | 7.9 g | 10.8 g |
| Onions, spring or scallions (includes tops and bulb), raw Raw | 32 | 1.8 g | 7.3 g | 0.19 g |
| Onions, young green, tops only | 27 | 0.97 g | 5.7 g | 0.47 g |
| Onions, welsh, raw Raw | 34 | 1.9 g | 6.5 g | 0.4 g |
| Onions, sweet, raw Raw | 32 | 0.8 g | 7.6 g | 0.08 g |
| Onions, frozen, chopped, cooked, boiled, drained, with salt Cooked | 26 | 0.77 g | 6 g | 0.1 g |
| Onions, frozen, chopped, unprepared Frozen | 29 | 0.79 g | 6.8 g | 0.1 g |
| Onions, frozen, chopped, cooked, boiled, drained, without salt Cooked | 28 | 0.77 g | 6.6 g | 0.1 g |
Per 100 g. Calories in kcal. n/a: not reported by the source.
Foods with a similar nutritional profile
| Food | Calories | Protein | Carbs | Fat |
|---|---|---|---|---|
| Peppers and onions, cooked, no added fat Cooked | 37 | 1.1 g | 8.4 g | 0.12 g |
| Beets, canned, cooked, no added fat Cooked | 31 | 0.91 g | 7.2 g | 0.14 g |
| Peppers, sweet, red, cooked, boiled, drained, without salt Cooked | 28 | 0.92 g | 6.7 g | 0.2 g |
| Sweet potato leaves, cooked, steamed, without salt Cooked | 35 | 2.2 g | 7.4 g | 0.34 g |
| Sweet potato leaves, cooked, steamed, with salt Cooked | 35 | 2.2 g | 7.4 g | 0.34 g |
| Rutabagas, cooked, boiled, drained, without salt Cooked | 30 | 0.93 g | 6.8 g | 0.18 g |
| Rutabagas, cooked, boiled, drained, with salt Cooked | 30 | 0.93 g | 6.8 g | 0.18 g |
| Peppers, sweet, red, cooked, boiled, drained, with salt Cooked | 26 | 0.92 g | 6.1 g | 0.2 g |
Per 100 g. Calories in kcal. n/a: not reported by the source.
Frequently asked questions
How many calories are in cooked onions?
100 g of cooked onions has 42 kcal. 1 slice medium, 1/8" thick (12 g): about 5 kcal. 1 slice thin (8 g): about 3 kcal. 1 tbsp chopped (15 g): about 6 kcal.
How much protein is in cooked onions?
Cooked onions contains 1.4 g of protein per 100 g (3% of the 50 g Daily Value), or 0.16 g in 1 slice medium, 1/8" thick (12 g). About 12% of its calories come from protein. Compared with other vegetables and vegetable products, that is below the median (median 2 g).
How many carbs are in cooked onions?
Cooked onions has 9.6 g of total carbohydrates per 100 g, including 1.4 g of fiber and 4.7 g of sugars.
How much fat is in cooked onions?
Cooked onions contains 0.19 g of fat per 100 g, of which 0.031 g is saturated (0.2% of the Daily Value).
How much sodium is in cooked onions?
100 g contains 239 mg of sodium, 10% of the 2,300 mg Daily Value.
Does onions have the same nutrition cooked and raw?
No. Per 100 g, onions, cooked, boiled, drained, with salt has 42 kcal, while onion, raw has 40 kcal. Cooking changes the water content, so always use the record that matches how you weigh the food.
Where does this nutrition data come from?
From USDA FoodData Central: SR Legacy, record dated April 1, 2019. FoodFactly last checked it on November 6, 2026. Each value above shows whether it was measured, calculated or taken from a label.
Source of the nutrition information
- USDA FoodData Central: SR Legacy, record 170100. License: CC0 1.0 (U.S. public domain). Source record dated April 1, 2019. Imported November 6, 2026.
Last updated: . Data quality score: 100/100 (how it is calculated).
General nutrition information, not medical advice. Individual needs differ; see our disclaimer.