Tuna vs chicken: which has more protein?

In most common comparisons, cooked skinless chicken breast comes out slightly ahead. A 3-ounce serving of cooked chicken breast provides about 26 grams of protein, while a 3-ounce serving of canned light tuna in water provides about 20–22 grams, depending on the brand and how well it is drained.

If you compare by weight, the gap is usually small. Chicken breast is often around 31 grams of protein per 100 grams cooked, while tuna is often around 25–29 grams per 100 grams, depending on the species and preparation. So the answer to “is tuna high in protein than chicken” is usually no, but tuna is still very protein-dense.

Why the answer changes by cut and preparation

Not all chicken is the same. Chicken breast is the leanest, most protein-dense cut. Chicken thigh, wings, breaded chicken, and fried chicken usually have less protein per calorie because they contain more fat, skin, or coating.

Tuna also varies. Fresh tuna steaks can be very high in protein, but canned tuna differs by species and packing liquid. Tuna in oil is more calorie-dense than tuna in water, even when protein is similar. That means the “best” choice depends on whether you want maximum protein, fewer calories, or a more filling meal.

Protein, calories, and health trade-offs

If your goal is the most protein with fewer calories, both chicken breast and tuna work well. Chicken is often a better everyday lean protein because it is versatile and typically lower in mercury concerns than tuna.

Tuna has its own benefits: it is convenient, affordable, and rich in nutrients like selenium and, depending on the type, omega-3 fats. The main caution is mercury. The FDA and EPA advise limiting higher-mercury fish and choosing lower-mercury options more often, especially for pregnant people and young children.

For muscle building or fat loss, total daily protein matters more than choosing one food. A balanced intake across meals helps support muscle repair and satiety. If you track meals or workouts, tools like Fitnit can make it easier to log high-protein foods and keep an eye on training volume without overthinking it.

How to choose between tuna and chicken

Choose chicken breast if you want a lean, low-mercury staple you can use in almost any meal. Choose tuna if you want a fast, shelf-stable protein source that still gives you a strong protein hit.

If you eat tuna often, vary the type and portion size. If you eat chicken often, prefer grilled, baked, or air-fried preparations over breaded or fried versions to keep protein high and calories under control.

Tips

• Compare portions, not just foods: a larger serving of tuna can beat a smaller serving of chicken.
• Pick chicken breast when you want the highest protein with very little fat.
• Choose tuna in water for fewer calories than tuna in oil.
• Limit frequent intake of high-mercury tuna types and vary your protein sources.
• Use a food scale or photo-based meal logging to make protein comparisons more accurate.