Tomato soup is not keto: it has ~20 g of net carbs per 1 cup, against the keto diet's 5 g-per-serving limit.
Net carbs
20 g
per 1 cup
These are the carbs that count on keto: total carbs minus fiber.
At about 20 g net carbs per cup, tomato soup is too high in carbs for keto, especially since canned versions often contain added sugar.
Nutrition facts for tomato soup
3 g
Fat
2 g
Protein
2 g
Fiber
Why tomato soup is not keto?
On keto the goal is to stay under ~5 g of net carbs per serving; tomato soup has 20 g per 1 cup (22 g total − 2 g of fiber).
How much tomato soup can I eat on keto?
To stay under 5 g of net carbs, the limit is ~61 g of tomato soup.
Related
In moderation
Coleslaw
9 g net
/ 1/2 cup
No
Chili
15 g net
/ 1 cup
No
Cauliflower pizza
17 g net
/ 2 slices (1/4 of a 12-inch pizza)
Yes
Miso soup
4 g net
/ 1 bowl (1 cup)
Yes
Chicken salad
2 g net
/ 1/2 cup
Yes
Egg drop soup
3 g net
/ 1 cup
See all: Keto fast food
Source: nutritional estimate (USDA-style reference) · Confidence: medium
Reviewed by the Ketorai team · Last updated: July 2, 2026 · How we assign the verdict
For information only. This does not replace advice from a health professional.
Reviewed by the Ketorai team · Last updated: July 2, 2026 · How we assign the verdict
For information only. This does not replace advice from a health professional.
Something off? Let us know.
Search another food