Is Onion keto?
OK in moderation
In moderation — onions have about 7.6g net carbs per 100g, so use them as a flavoring in small amounts rather than a main ingredient.
65/100
KarbZilla Keto Score
OK in moderation
Fits a keto day: About 2 servings
Macro split
2% fat10% protein88% carbs
Net carbs
7.6g
Protein
1.1g
Fat
0.1g
Calories
40
Values per 100g raw, referenced from USDA FoodData Central. Reviewed by the KarbZilla team · how we score
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Onions are surprisingly sugary for a vegetable.
Keto tips
- A tablespoon of diced onion for flavor is fine
- Caramelized onions concentrate the sugar — go easy
- Green onion tops and chives are lower-carb alternatives
Treat onion as a seasoning, not a serving.