Carbs in Tuna: The Quick Answer
Tuna contains 0.0g of net carbs per 100g, calculated by subtracting 0.0g of dietary fiber from 0.0g of total carbohydrates. With 116 calories, 25.5g protein, and 2.5g fat per 100g, it is classified as Keto Friendly for carbohydrate content.
Net carbs — not total carbs — are what matter for keto and low-carb diets. Only net carbs raise blood sugar and affect insulin, which is why tracking them accurately is key to staying in ketosis. Use our Keto Macro Calculator to find your daily net carb limit based on your body and goals.
Is Tuna Keto Friendly?
Tuna is keto friendly with only 0.0g net carbs per 100g. It fits comfortably within the standard keto limit of 20–50g net carbs per day and can be included regularly on a ketogenic diet.
Best Low-Carb Pairings for Tuna
Tuna is already a smart low-carb choice. Here's how to build a great keto meal around it.
| Pair with | Best for | Why it works |
|---|---|---|
| Cauliflower mash or riced cauliflower | Side dish | The universal low-carb side — replaces any grain or starchy veg |
| Roasted low-carb veg (broccoli, zucchini, asparagus) | Dinner plate | Pair any protein with roasted veg for a complete keto meal |
| Salad with olive oil and vinegar | Lighter side | ~3g net carbs — balances heavy proteins |
How Net Carbs Are Calculated
Net carbs are calculated by subtracting dietary fiber (and sugar alcohols, if present) from total carbohydrates: Net Carbs = Total Carbs − Fiber. For Tuna: 0.0g − 0.0g = 0.0g net carbs per 100g.
Dietary fiber is subtracted because it passes through the digestive system without being absorbed as glucose. It does not raise blood sugar or trigger an insulin response, making it irrelevant for carb counting on keto and low-carb diets.