Onion soup: calories and nutrition facts

Onion soup has 19 kcal per 100 g. One serving, 1 Bowl (250 g), has 49 kcal.

Calories: 19 kcal
Protein: 0.5 g
Carbohydrates: 3.4 g
Fat: 0.4 g

Per 100 g

Onion soup: how many calories?

Onion soup has 19 kcal per 100 g, with 0.5 g protein, 3.4 g carbs and 0.4 g fat. A 250 g serving (1 Bowl) has 49 kcal. That is less than the average for Starters & Mains (171 kcal per 100 g). Most of its calories come from carbohydrates.

Where the calories come from

Protein11%
Carbohydrates71%
Fat18%

Calculate a portion

Amountg

Calories: 49 kcal
Protein: 1.3 g
Carbohydrates: 8.4 g
Fat: 1 g

Nutrition facts

Nutrient	Per 100 g	Per serving (250 g)
Calories	19 kcal	49 kcal
Fat	0.4 g	1 g
of which saturated fat	0.1 g	0.4 g
Carbohydrates	3.4 g	8.4 g
of which sugars	1 g	2.5 g
Fiber	0.3 g	0.9 g
Protein	0.5 g	1.3 g
Sodium	318 mg	795 mg
Water	94.1 g	235.3 g
Vitamin C	0 mg	0 mg
Calcium	20 mg	50 mg
Iron	0 mg	0 mg
Potassium	57 mg	142 mg
Magnesium	5 mg	13 mg

Source: Ciqual food composition table (ANSES, France). Data updated on 2 September 2026.

Share of reference intakes

Per 100 g, compared with an adult's reference intakes (2,000 kcal a day, Regulation (EU) No 1169/2011).

Nutrient	Of reference intake
Calories(19 kcal)	1%
Fat(0.4 g)	1%
of which saturated fat(0.1 g)	1%
Carbohydrates(3.4 g)	1%
of which sugars(1 g)	1%
Protein(0.5 g)	1%
Salt(0.8 g)	13%

What the EU thresholds say

Nutrition claim thresholds from Regulation (EC) No 1924/2006, per 100 g.

Low energy (40 kcal or less)
Low fat (3 g or less)
Low sugars (5 g or less)

Onion soup: frequently asked questions

Onion soup: how many calories per serving?

A 250 g serving (1 Bowl) has 49 kcal.

Onion soup: how much protein?

Onion soup contains 0.5 g of protein per 100 g, 1% of the 50 g reference intake.

Onion soup: how much fibre?

Onion soup provides 0.3 g of fibre per 100 g, 1% of the 25 g a day recommended by EFSA.

Onion soup: how much makes 100 kcal?

100 kcal is about 515 g of this food.

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