Tuna Steak Calories & Carbs
Keto-friendlyLast updated September 8, 2026 · Compiled by the CarbMeNot Team
Values per 6 oz cooked (170g); per 100 g: 0g net carbs, 109 cal. Net carbs = total carbs − fiber − sugar alcohols — do the math for any label with the free net carbs calculator.
How many carbs are in tuna steak?
Tuna Steak — 6 oz cooked (170g) — has 0g net carbs: 0g total carbs minus 0g fiber, plus 42g protein, 2g fat, and 185 calories. Per 100g that is 0g net carbs (0g total carbs, 0g fiber) and 109 calories. That makes tuna steak 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 steak fits a keto or low-carb diet (usually 20–50g net carbs per day) in normal portions. Values are per 100 g, sourced from Manufacturer-reported values; net carbs are computed by CarbMeNot.
Is tuna steak keto-friendly?
Yes — tuna steak is keto-friendly. 6 oz cooked (170g) is 0g net carbs (0g total carbs − 0g fiber); per 100g that is 0g net carbs. On a standard keto diet (20–50g net carbs per day), that leaves plenty of room for other protein foods and meals.
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Carbs by serving size
| Serving | Net carbs | Total carbs | Protein | Calories |
|---|---|---|---|---|
| 6 oz cooked | 0g | 0g | 42g | 185 |
| 100 g (3.5 oz) | 0g | 0g | 24.7g | 109 |
| 1 oz (28 g) | 0g | 0g | 6.9g | 31 |
How many calories are in tuna steak?
Tuna Steak — 6 oz cooked (170g) — has 185 calories, with 42g protein, 2g fat, and 0g net carbs. Per 100g: 109 calories and 0g net carbs.
Nutrition facts
| Nutrient | Amount (per 100 g) |
|---|---|
| Calories | 109 |
| Total carbs | 0g |
| Net carbs | 0g |
| Fiber | 0g |
| Sugar | 0g |
| Sugar alcohols | 0g |
| Protein | 24.7g |
| Fat | 1.2g |
| Sodium | 49mg |
| Potassium | 285mg |
Source: Manufacturer-reported values (protein). Net carbs = total carbs − fiber − sugar alcohols, computed by CarbMeNot.
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Frequently asked questions
- How many carbs are in tuna steak?
- Tuna Steak (6 oz cooked, 170g) has 0g of total carbs and 0g of net carbs. Per 100 grams: 0g total, 0g net.
- How many net carbs are in tuna steak?
- Tuna Steak has 0g of net carbs per 6 oz cooked (170g) — 0g total carbs minus 0g fiber.
- Is tuna steak keto-friendly?
- Yes — tuna steak is keto-friendly. 6 oz cooked (170g) is 0g net carbs (0g total carbs − 0g fiber); per 100g that is 0g net carbs. 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 steak?
- Tuna Steak (6 oz cooked, 170g) has 185 calories; that is 109 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.