Carbs in Tuna
Keto-friendlyHow many carbs are in tuna?
Tuna has 1.8g net carbs per 100g — 1.8g total carbs minus 0g fiber — plus 19.6g protein, 1.8g fat, and 107 calories. That makes tuna very low in net carbs and lower than the typical protein food, which averages about 9.2g net carbs per 100g. With this carb count, tuna 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 Open Food Facts; 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 tuna keto-friendly?
Yes — tuna is keto-friendly. It has 1.8g net carbs per 100g (1.8g total carbs − 0g fiber). On a standard keto diet (20–50g net carbs per day), that leaves plenty of room for other protein foods and meals.
Carbs by serving size
| Serving | Net carbs | Total carbs | Protein | Calories |
|---|---|---|---|---|
| 100 g (3.5 oz) | 1.8g | 1.8g | 19.6g | 107 |
| 1 oz (28 g) | 0.5g | 0.5g | 5.5g | 30 |
How many calories are in tuna?
Tuna has 107 calories per 100g. That's alongside 19.6g protein, 1.8g fat, and 1.8g net carbs per 100g.
Nutrition facts
| Nutrient | Amount (per 100 g) |
|---|---|
| Calories | 107 |
| Total carbs | 1.8g |
| Net carbs | 1.8g |
| Fiber | 0g |
| Sugar | 0g |
| Sugar alcohols | 0g |
| Protein | 19.6g |
| Fat | 1.8g |
| Sodium | 241mg |
| Potassium | 0mg |
Source: Open Food Facts (Fisha Tuna). Net carbs = total carbs − fiber − sugar alcohols, computed by CarbMeNot.
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Frequently asked questions
- How many carbs are in tuna?
- Tuna has 1.8g of total carbs and 1.8g of net carbs per 100 grams.
- How many net carbs are in tuna?
- Tuna has 1.8g of net carbs per 100 grams (total carbs 1.8g minus 0g fiber).
- Is tuna keto-friendly?
- Yes — tuna is keto-friendly. It has 1.8g net carbs per 100g (1.8g total carbs − 0g fiber). On a standard keto diet (20–50g net carbs per day), that leaves plenty of room for other protein foods and meals.
- How many calories are in tuna?
- Tuna has 107 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.