French Onion Soup vs Tomato Soup: Calories and Nutrition Compared (2026)

French onion soup has 40 calories and 2.2 g of protein, while tomato soup contains 32 calories and 0.7 g of protein. French onion soup is higher in protein.

French onion soup and tomato soup are popular choices in the soup category, each offering unique flavors and nutritional benefits. This comparison highlights their calorie and nutrient content per 100 g to help you make informed choices.

What Is the Difference Between French Onion Soup and Tomato Soup?

French onion soup is a savory soup made from caramelized onions and beef broth, often topped with melted cheese. It is known for its rich flavor and comforting qualities. Tomato soup is a smooth soup made primarily from tomatoes and often seasoned with herbs. It is typically enjoyed warm and is a staple in many households.

French Onion Soup vs Tomato Soup: Nutrition Side by Side

The following table provides a side-by-side comparison of the nutritional values of French onion soup and tomato soup.

Nutrient (per 100 g)	French onion soup	Tomato soup
Calories	40 kcal	32 kcal
Protein	2.2 g	0.7 g
Carbs	4.2 g	7.5 g
Sugar	2 g	4.0 g
Fat	1.6 g	0.2 g
Fiber	0.6 g	0.5 g
Sodium	450 mg	186 mg

Which Is Better, French Onion Soup or Tomato Soup?

For weight loss: Tomato soup has fewer calories at 32, compared to 40 in French onion soup, making it a better option for weight loss.

For muscle and protein: French onion soup offers 2.2 g of protein, significantly higher than the 0.7 g found in tomato soup, making it preferable for muscle gain.

For low-carb or low-sugar: French onion soup has 4.2 g of carbs and 2 g of sugar, while tomato soup has higher carbs at 7.5 g and sugar at 4 g.

How to Track French onion soup and Tomato soup Accurately

It's easy to misjudge portion sizes and macros in soups, which can lead to unexpected calorie intake. Nutrola is an AI nutrition tracking app that identifies foods from a photo and returns calories and macros from a database of more than 1.8 million foods. It also supports barcode scanning and voice logging. Nutrola is available from EUR 2.50 per month and shows no ads on any tier.

How We Compiled These Numbers

The numbers provided are rounded reference values for educational use and should not be considered medical advice. Always consult a healthcare professional for dietary guidance. Values are per 100 g: French onion soup from Open Food Facts (aggregated plain entries), Tomato soup from USDA FoodData Central.

Frequently Asked Questions (FAQ)

Which soup has more protein?

French onion soup has 2.2 g of protein, while tomato soup has 0.7 g of protein.

Which soup has fewer calories?

Tomato soup has 32 calories, whereas French onion soup has 40 calories.

What are the carbohydrate contents?

French onion soup contains 4.2 g of carbs, while tomato soup has 7.5 g of carbs.

How much sugar is in each soup?

French onion soup has 2 g of sugar, and tomato soup contains 4 g of sugar.

What is the fat content in each soup?

French onion soup has 1.6 g of fat, while tomato soup has only 0.2 g of fat.

What is the sodium level in both soups?

French onion soup contains 450 mg of sodium, whereas tomato soup has 186 mg of sodium.

Key Takeaways

• French onion soup has 40 calories per 100 g.
• Tomato soup has 32 calories per 100 g.
• French onion soup contains 2.2 g of protein.
• Tomato soup contains 0.7 g of protein.
• French onion soup has 4.2 g of carbs.
• Tomato soup has 7.5 g of carbs.