
Yes. A medium tomato (approximately 100g) contains around 3.9g total carbohydrates and 1.2g fibre, giving a net carb count of roughly 2.7g (AUSNUT). This fits comfortably within the 20-50g daily net carb limit typical of a ketogenic diet, making tomatoes one of the more keto-compatible fruits available.
How many net carbs are in a tomato?
All fresh tomato varieties are broadly keto-compatible when eaten in reasonable portions. Cherry and grape tomatoes are convenient for portion control. Canned tomatoes (whole, crushed, or diced with no added sugar) also work well. Avoid tomato paste and tomato sauce products with added sugar, as these significantly increase the net carb count per serve.
It depends on the product. Many commercial tomato sauces and pasta sauces contain added sugar, pushing net carbs higher than fresh tomatoes. Always check the nutrition information panel and choose sauces with no added sugar. Homemade tomato sauce using fresh or canned tomatoes, olive oil, garlic, and herbs is a reliable low-carb option. An Accredited Practising Dietitian can help you identify suitable products for your individual carb threshold.
