A typical serving of canned tuna (1 can, drained, 165 g) has about 191 calories. Per 100 g: 116 kcal, 25.5 g protein, 0 g carbs, 0.8 g fat. 3 oz (85 g) comes to 99 calories. Protein supplies most of that energy.
| Serving | Weight | Calories |
|---|---|---|
| 1 can, drained | 165 g | 191 kcal |
| 3 oz | 85 g | 99 kcal |
| 100 g | 100 g | 116 kcal |
One drained can delivers about 42 g of protein for under 200 calories. On the energy-density scale, 116 kcal per 100 g puts canned tuna at the low end. Protein density is strong: about 22.0 g of protein per 100 calories.
A typical serving (1 can, drained, 165 g) has about 191 calories, and 100 g has 116 kcal. Calories scale with weight, so double the portion means double the number.
There are 25.5 g of protein in 100 g of canned tuna, which works out to about 42.1 g per serving (1 can). That is a genuinely high protein share for the calories.
Yes. Carbohydrate is 0 g per 100 g, effectively nothing, so almost all the calories come from protein and fat.
Every value on this page comes from USDA FoodData Central, entry 171986 (SR Legacy). Serving figures are converted from the per-100-g data, so rounding can shift a total by a calorie or two.
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Nutrition data: USDA FoodData Central, FDC ID 171986 (SR Legacy). Serving calories are computed from the per-100-g values.
