Carbs in Tomatoes 1 Cup
Keto-friendlyHow many carbs are in tomatoes 1 cup?
Tomatoes 1 Cup has 2.8g net carbs per 100g — 4g total carbs minus 1.2g fiber — plus 0.8g protein, 0.3g fat, and 20 calories. That makes tomatoes 1 cup very low in net carbs and lower than the typical vegetable, which averages about 17.9g net carbs per 100g. With this carb count, tomatoes 1 cup fits a keto or low-carb diet (usually 20–50g net carbs per day) in normal portions. Values are per per 100 g, sourced from USDA FoodData Central; net carbs are computed by CarbMeNot.
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Last updated June 10, 2026 · Reviewed by Jordan Lee, Nutrition Editor
Values per 100 g.
Is tomatoes 1 cup keto-friendly?
Yes — tomatoes 1 cup is keto-friendly. It has 2.8g net carbs per 100g (4g total carbs − 1.2g fiber). On a standard keto diet (20–50g net carbs per day), that leaves plenty of room for other vegetables and meals.
Carbs by serving size
| Serving | Net carbs | Total carbs | Protein | Calories |
|---|---|---|---|---|
| 100 g (3.5 oz) | 2.8g | 4g | 0.8g | 20 |
| 1 oz (28 g) | 0.8g | 1.1g | 0.2g | 6 |
How many calories are in tomatoes 1 cup?
Tomatoes 1 Cup has 20 calories per 100g. That's alongside 0.8g protein, 0.3g fat, and 2.8g net carbs per 100g.
Nutrition facts
| Nutrient | Amount (per 100 g) |
|---|---|
| Calories | 20 |
| Total carbs | 4g |
| Net carbs | 2.8g |
| Fiber | 1.2g |
| Sugar | 2.6g |
| Sugar alcohols | 0g |
| Protein | 0.8g |
| Fat | 0.3g |
| Sodium | 4mg |
| Potassium | 226mg |
Source: USDA FoodData Central (Survey (FNDDS)). Net carbs = total carbs − fiber − sugar alcohols, computed by CarbMeNot.
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Frequently asked questions
- How many carbs are in tomatoes 1 cup?
- Tomatoes 1 Cup has 4g of total carbs and 2.8g of net carbs per 100 grams.
- How many net carbs are in tomatoes 1 cup?
- Tomatoes 1 Cup has 2.8g of net carbs per 100 grams (total carbs 4g minus 1.2g fiber).
- Is tomatoes 1 cup keto-friendly?
- Yes — tomatoes 1 cup is keto-friendly. It has 2.8g net carbs per 100g (4g total carbs − 1.2g fiber). On a standard keto diet (20–50g net carbs per day), that leaves plenty of room for other vegetables and meals.
- How many calories are in tomatoes 1 cup?
- Tomatoes 1 Cup has 20 calories per 100 grams.
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CarbMeNot provides general nutrition information, not medical advice. Values are estimates — verify before relying on them for any health decision. See our Medical Disclaimer.