Fish & Seafood
Protein in Tuna: Protein, Calories, and Meal Ideas
Canned tuna in water is one of the most convenient lean protein foods. A drained can gives about 33 g of protein with very high protein density.
Protein per serving
33g
130 g drained canned tuna / about 1 can
Calories per serving
151
130 g serving
Protein per 100g
25g
116 calories per 100 g
Protein density
21.6g
protein per 100 calories
Tuna Nutrition Snapshot
| Measure | Amount | Protein | Calories |
|---|---|---|---|
| Typical serving | 130 g drained canned tuna / about 1 can | 33g | 151 |
| Per 100 g | 100 g | 25g | 116 |
| Protein density | 100 calories | 21.6g | 100 |
Representative source entry: Tuna, light, canned in water, drained solids. Use drained weight for canned tuna. Tuna packed in oil has more calories than tuna packed in water.
Good for weight loss? Excellent
Tuna in water is lean, high in protein, portable, and easy to add to low-calorie meals.
Good for muscle gain? Good
Tuna is a complete protein source. Pair it with rice, potatoes, bread, or pasta when you need more calories for muscle gain.
Meal Ideas with Tuna
Tuna rice bowl with vegetables and soy sauce
Tuna salad made with Greek yogurt
Tuna sandwich with eggs or cottage cheese on the side
Tuna pasta with tomato sauce and spinach
How Tuna Compares for Protein Density
Tuna works as a seafood protein with about 25 g protein and 116 calories per 100 g. That equals 21.6 g protein per 100 calories, or about 4.6 calories per gram of protein. This density number is useful because two foods can both look high protein while one needs far more calories to deliver the same protein target.
Tuna is more protein-dense than the average of the related foods shown below, so it is easier to use when calories are tight. Fish and seafood pages should be read with cooking method in mind. Plain baked, grilled, steamed, or dry-heat seafood is usually very different from breaded, fried, butter-poached, or restaurant seafood. Use the comparison table as a planning shortcut: choose the higher-density option when calories are limited, and choose the more calorie-dense option when appetite is low or muscle-gain meals need to be easier to finish.
| Food | Serving protein | Protein / 100g | Protein / 100 cal |
|---|---|---|---|
| Tuna | 33g | 25g | 21.6g |
| Chicken Breast | 46g | 31g | 18.8g |
| Atlantic Salmon | 20.4g | 20.4g | 9.8g |
| Eggs | 13g | 13g | 8.4g |
Best Uses for Tuna
For Weight Loss or Calorie Control
Tuna is especially useful in a calorie deficit because the protein serving is strong relative to calories. Build the plate around the protein first, then add vegetables, fruit, potatoes, beans, or grains based on hunger and training needs. For this page's representative serving, 130 g drained canned tuna / about 1 can gives about 33 g protein. If your meal target is 30 g protein, that is roughly 0.9 typical servings, or about 120 g by weight. This is why weighing the first few servings is useful: it turns a vague protein food into a repeatable meal component.
For Muscle Gain or Higher-Calorie Meals
Tuna is a complete protein source. Pair it with rice, potatoes, bread, or pasta when you need more calories for muscle gain. When using tuna for muscle gain, the question is not only whether it contains protein; it is whether the whole meal has enough total protein, carbohydrates, and calories to support training. If you need more calories, pair it with rice, potatoes, pasta, avocado, or olive oil. If you need fewer calories, keep the cooking method dry and use vegetables or salad for volume. A practical muscle-gain plate is to keep the tuna portion consistent, then adjust rice, pasta, oats, potatoes, bread, beans, oil, nuts, or dairy up or down depending on your calorie target.
For Meal Prep and Repeatable Tracking
Tuna is easiest to track when the serving method stays the same from week to week. Choose one default serving, log it with the matching raw, cooked, dry, drained, or label-based entry, and then build meals around that known number. Good repeatable options include Tuna rice bowl with vegetables and soy sauce, Tuna salad made with Greek yogurt, Tuna sandwich with eggs or cottage cheese on the side, and similar meals where the protein portion is measured before sauces and toppings are added.
Exact Serving Conversions
Serving conversions help when your food scale, recipe, or tracking app uses a different unit than this page. For Tuna, 1 oz is about 28.35 g and provides roughly 7.1 g protein and 32.9 calories based on the representative per-100-g values. Half of the typical serving gives about 16.5 g protein and 75.5 calories, while a double serving gives about 66 g protein and 302 calories.
Use gram targets when precision matters. To get 25 g protein from tuna, you need about 100 g, which is roughly 116 calories. To get 30 g protein, use about 120 g and 139.2 calories. To get 40 g protein, use about 160 g and 185.6 calories. These estimates are based on the USDA or representative source entry listed below, so the label on your exact product should win when there is a difference.
| Target | Approx. amount | Calories | Typical servings |
|---|---|---|---|
| 25g protein | 100g | 116 | 0.8x |
| 30g protein | 120g | 139.2 | 0.9x |
| 40g protein | 160g | 185.6 | 1.2x |
Raw, Cooked, Dry, or Label Weight?
The best tracking rule for Tuna is simple: match the database entry to the state of the food when you weighed it. This page uses Tuna, light, canned in water, drained solids as the representative source entry, with the serving shown as 130 g drained canned tuna / about 1 can. Use drained weight for canned tuna. Tuna packed in oil has more calories than tuna packed in water.
For seafood, the most common tracking mismatch is using a plain cooked fillet entry for a fried, sauced, or battered serving. If you batch cook, portion after cooking only when your tracker entry is also cooked. If you weigh before cooking, use a raw or dry entry and divide the finished batch into servings after cooking. If you are eating a packaged product, the label is normally the most specific source because brands can change water, sodium, sugar, fat, fortification, and serving size.
The most reliable workflow is to choose one method and repeat it: weigh the food, choose the matching raw, cooked, dry, drained, or packaged entry, then log oils, sauces, toppings, sides, and drinks separately. This avoids the most common protein tracking error, which is accidentally counting a prepared meal as if it were a plain serving of tuna.
Common Mistakes with Tuna
Most mistakes with Tuna are not about the protein number itself; they are about matching the wrong food form, ignoring preparation, or forgetting the extra ingredients that travel with the serving. Avoid these issues before comparing your intake against a daily target from the protein calculator.
- Using a generic tuna entry when the actual food is cooked, raw, flavored, breaded, sweetened, packed in oil, or from a specific brand.
- Counting Tuna as the entire meal even when the real calorie load comes from oil, dressing, sauce, bread, rice, tortillas, cheese, nuts, or toppings.
- Estimating by eye instead of weighing the first few times. A small portion change can move the meal by 5-15 g of protein or by a few hundred calories for calorie-dense foods.
- For seafood, the most common tracking mismatch is using a plain cooked fillet entry for a fried, sauced, or battered serving.
- Track tuna by drained weight when possible.
- Choose water-packed tuna for the leanest protein-to-calorie ratio.
- Rotate seafood sources rather than relying on tuna every day.
Building a High-Protein Meal with Tuna
Start with the protein target, not the recipe name. A light snack might only need 10-20 g protein, while a main meal often works better at 30-45 g protein depending on body size, meal frequency, and training. With Tuna, a 30 g protein meal is approximately 120 g of the representative food before sides and toppings. If that portion feels too large, combine a smaller amount of tuna with another protein from the related-food list.
A balanced plate usually needs more than protein. Pair tuna with a fiber source, a carbohydrate source if you train or need energy, and enough fat to make the meal satisfying. For lower-calorie meals, keep sauces light and increase vegetables. For higher-calorie meals, add rice, pasta, potatoes, bread, oats, beans, dairy, nuts, seeds, avocado, or oil depending on the type of food and your goal.
If the meal is meant to be repeated, write down the exact version that worked: the grams of tuna, the cooking method, the sides, and the sauce. That gives you a reusable meal template instead of a one-time estimate, and it makes future protein targets easier to hit without redoing the math every day.
Tracking Tips
- Track tuna by drained weight when possible.
- Choose water-packed tuna for the leanest protein-to-calorie ratio.
- Rotate seafood sources rather than relying on tuna every day.
Compare Similar Protein Foods
Related Calculators and Guides
Common Questions
How much protein is in a can of tuna?
A typical 130 g drained can of tuna in water has about 33 g of protein and about 151 calories.
Is tuna good for weight loss?
Yes. Tuna packed in water is very high in protein relative to calories, which makes it useful during a calorie deficit.
Is tuna good for muscle gain?
Yes. Tuna provides complete protein, but for muscle gain it is usually best paired with calorie sources like rice, pasta, bread, or potatoes.
Sources reviewed
- USDA FoodData Central: tuna, light, canned in water, drained solids - U.S. Department of Agriculture
- International Society of Sports Nutrition Position Stand: protein and exercise - Journal of the International Society of Sports Nutrition