Calorie data · Prepared Foods← All foods

How many calories in
french onion soup?

French Onion Soup runs 78 calories per 100g, with manageable fat content. Logged accurately, it can fit most plans; the issue is usually estimating actual portion size.

78
kcal · 100g
3g
Protein
6g
Carbs
4.5g
Fat
Servings

Common serving sizes.

Calories scale with portion. Here's how a typical french onion soup serving translates in your tracker:

Serving
Calories
Protein
3 oz (85g)
66 kcal
2.5g
4 oz (113g)
88 kcal
3.4g
1 cup (~150g)
117 kcal
4.5g
In your day

What 78 calories means.

Balanced — french onion soup sits in a moderate range and fits weight loss, maintenance, or muscle gain when portioned to your daily target.

Share of a 2,000-kcal day
4%
per 100g · 3.8g protein per 100 kcal
Time to burn it off
🚶 Walking15 min
🏃 Running8 min
🚴 Cycling8 min
Estimated for a 70 kg / 154 lb adult
Comparison

French Onion Soup vs. similar foods.

How french onion soup stacks up on calories and protein against foods people commonly compare it to:

Food
Calories
Protein / 100 kcal
French Onion Soup
78 kcal / 100g
3.8g
70 kcal / 100g
8.6g
90 kcal / 100g
3.3g
65 kcal / 100g
4.6g
Track this food

Skip the lookup. Snap the plate.

Point your iPhone camera at french onion soup and Spotwell's on-device AI estimates the portion and macros in under a second — no manual entry, no barcode hunting.

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FAQ

Quick answers.

How many calories in french onion soup?

French Onion Soup has approximately 78 calories per 100g. A typical serving — 3 oz (85g) — comes in at 66 calories.

How much protein is in french onion soup?

3g of protein per 100g. That puts french onion soup at roughly 3.8g of protein per 100 calories — a useful lens when comparing to other prepared foods sources.

How do I log french onion soup accurately?

The simplest method: weigh it on a kitchen scale, then enter grams in your tracker. With Spotwell, you can skip the scale — point the camera at the plate and the AI estimates the portion in under a second. Adjust the value if it looks off.

Is french onion soup good for weight loss?

It depends on your overall calorie target. French Onion Soup is naturally low-calorie at 78 kcal per 100g, so it's easy to fit into a deficit.