How much protein is in 2 cans of tuna?

For a typical 5-ounce can of tuna, the protein content is usually around 20 to 25 grams per can once drained. Two cans therefore usually provide about 40 to 50 grams of protein total. In many real-world cases, 2 cans of tuna land very close to 50 grams.

The best way to calculate it is simple: protein per can × 2. If one can lists 22 grams, two cans give you 44 grams. If one can lists 25 grams, two cans give you 50 grams. The label is the final word because can size and draining method vary by brand.

Why the number changes: can size, tuna type, and packing liquid

The biggest reason the total changes is serving size. Some tuna cans are sold as 5-ounce cans with a drained weight that is lower than the full can. That means the protein you actually eat may be based on the drained portion, not the liquid in the can.

Tuna packed in water and tuna packed in oil usually have similar protein per serving, but oil-packed tuna tends to have more calories and fat. Tuna species can also differ a little. Albacore, skipjack, and light tuna may not all have identical nutrition profiles, so the safest approach is to read the Nutrition Facts panel on the can you buy.

How 2 cans of tuna fit into a high-protein meal

Two cans of tuna can cover a large chunk of a day’s protein needs for many adults. The NIH notes that protein needs vary by body size, age, and activity level, but many people aim for enough protein at each meal to support fullness and muscle maintenance. A two-can tuna meal can easily qualify as a high-protein lunch or dinner.

That said, more protein is not always better if the rest of the meal is unbalanced. Pair tuna with fiber-rich foods like beans, vegetables, whole grains, or fruit to make the meal more filling and more complete. If you’re using tuna as part of a training plan, Fitnit can help you keep workouts consistent at home with phone-based rep counting and form analysis, which can make it easier to match nutrition with training without needing extra equipment.

Health notes: mercury, sodium, and safety

Tuna is a nutritious protein source, but it’s worth paying attention to mercury and sodium. The FDA and EPA advise choosing tuna varieties and portions with mercury exposure in mind, especially for pregnant people, breastfeeding parents, and young children. Light tuna generally contains less mercury than albacore.

Sodium can also add up quickly, especially in canned foods. If you’re watching blood pressure or overall sodium intake, look for lower-sodium options and rinse tuna when appropriate. For the safest routine, rely on the can label, vary your protein sources, and keep tuna as part of a broader diet rather than the only protein you eat.

Tips

• Check the label for the drained serving size, not just the can size.
• Use the simple formula: protein per can × 2.
• Choose water-packed tuna if you want fewer calories and less added fat.
• Rotate tuna with other proteins like eggs, Greek yogurt, chicken, beans, and salmon.
• If you eat tuna often, pay attention to mercury guidance and choose light tuna more often than albacore.