TempoLife › Calorie database › Soups › Onion soup
Onion soup calories and nutrition facts
100 grams of onion soup contains 12 calories, with 0.3 g of protein, 2.8 g of carbohydrate and 0 g of fat. It provides 0.3 g of fiber and 0.2 g of sugar per 100 g. Most of its calories come from carbohydrate.
Where the calories come from
Protein 10% Carbs 90% Fat 0%
How onion soup compares
Per 100 g, against the closest soups in this database.
| Food | Calories | Protein | Carbs | Fat |
|---|---|---|---|---|
| Onion soup | 12 kcal | 0.3 g | 2.8 g | 0 g |
| Swanson vegetable broth | 6 kcal | 0.2 g | 1 g | 0.1 g |
| Vegetable broth | 5 kcal | 0.2 g | 0.9 g | 0.1 g |
| Chicken broth, prepared | 5 kcal | 0.4 g | 0.6 g | 0.1 g |
| Beef stock | 13 kcal | 2 g | 1.2 g | 0.1 g |
Nutrition facts for onion soup
| Nutrient | Per 100 g |
|---|---|
| Calories | 12 kcal |
| Protein | 0.3 g |
| Carbohydrate | 2.8 g |
| Fat | 0 g |
| Fiber | 0.3 g |
| Sugar | 0.2 g |
| Saturated fat | 0 g |
| Salt | 0.9 g |
Print an EU-style nutrition label for onion soup — per 100 g and per portion.
Vitamins and minerals in onion soup
Per 100 g, highest share of the Daily Value first. %DV = the adult Daily Value (FDA reference). USDA reference data — not medical advice.
| Nutrient | Per 100 g | %DV |
|---|---|---|
| Copper | 0.03 mg | 3% |
| Vitamin B6 | 0.03 mg | 2% |
| Calcium | 9 mg | 1% |
| Magnesium | 4 mg | 1% |
| Phosphorus | 9 mg | 1% |
| Potassium | 31 mg | 1% |
| Manganese | 0.03 mg | 1% |
| Thiamin (B1) | 0.01 mg | 1% |
See the richest foods per nutrient in the nutrient toplists.
Calories in common onion soup servings
How many calories in a portion of onion soup — reference serving estimates with the gram weight shown.
| Serving | Calories | Protein | Carbs | Fat |
|---|---|---|---|---|
| 1 fl oz (29 g) | 3.5 kcal | 0.1 g | 0.8 g | 0 g |
| 100 g (100 g) | 12 kcal | 0 g | 3 g | 0 g |
| 1 cup (230 g) | 28 kcal | 1 g | 6 g | 0 g |
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Frequently asked questions
How many calories are in onion soup?
Onion soup has 12 calories per 100 grams.
How much protein is in onion soup?
Onion soup contains 0.3 g of protein per 100 g.
Is onion soup low in carbs?
Yes by the numbers: Onion soup has 2.8 g of carbohydrate per 100 g. People following low-carb or keto approaches often include foods in this range — portion size and your own plan still decide.
Is onion soup low in calories?
Compared with other soups it is: 12 kcal per 100 g versus a category median of 61 kcal.
Are these onion soup calories exact?
No. These are per-100-gram reference values from the USDA FoodData Central SR Legacy source family. Portion size, ripeness, cut and cooking method all change the real number, so treat them as an estimate and log your own portion.
Related foods
Source: USDA FoodData Central SR Legacy #174568 (2018-04 release). US Government work — public domain in the United States. Reference values per 100 g edible portion.
