Calories in Tuna Steak: Complete Nutrition Breakdown & Expert Guide

A 3-ounce tuna steak delivers just 132 calories—and here’s what makes that number remarkable: 28.2 grams of that comes straight from protein, with virtually zero carbohydrates and only 1.3 grams of fat. Last verified: April 2026. This makes tuna steak one of the leanest animal proteins available, a fact that explains why it’s become a staple in muscle-building and weight-management diets alike.

What sets tuna steak apart isn’t just the calorie count—it’s the nutrient density packed into that modest serving. You’re getting selenium at 92 mcg (nearly 168% of your daily value), niacin at 18.8 mg, and vitamin B12 at 2.5 mcg. These micronutrients support energy metabolism, cellular repair, and cognitive function in ways that simple calories alone don’t capture. Our data shows tuna steak punches well above its weight class when it comes to nutritional return per calorie consumed.

Executive Summary

Tuna steak is a nutritional powerhouse that delivers exceptional protein density relative to its calorie content. A standard 3-ounce (85g) serving contains 132 calories, making it an extremely low-calorie protein source suitable for virtually any dietary goal. The macronutrient profile is striking: 28.2 grams of protein, 0 grams of carbohydrates, and just 1.3 grams of fat per serving. This near-zero carb profile combined with minimal fat makes tuna steak particularly attractive for ketogenic and low-carb eating patterns.

Beyond the macro picture, tuna steak delivers significant micronutrient value. Selenium content (92 mcg) exceeds typical daily needs, supporting thyroid function and antioxidant defense. Niacin at 18.8 mg addresses over 100% of daily requirements for most adults. Vitamin B12 (2.5 mcg) and vitamin D (82 IU) round out a micronutrient profile that justifies tuna’s reputation as a functional food. Whether your goal is weight loss, muscle gain, or optimizing nutrient intake, tuna steak consistently delivers.

Main Data Table

Nutrient	Amount per 3 oz (85g)	Daily Value %
Calories	132	6.6%*
Protein	28.2 g	56.4%**
Carbohydrates	0 g	0%
Dietary Fiber	0 g	0%
Total Fat	1.3 g	2%
Selenium	92 mcg	167%
Niacin (Vitamin B3)	18.8 mg	118%
Vitamin B12	2.5 mcg	104%
Vitamin D	82 IU	20%

*Based on 2,000 calorie diet | **Based on 50g daily protein recommendation

Breakdown by Experience/Category

Tuna steak nutrition varies slightly based on preparation method and cut, though the core 132-calorie, 28g-protein profile remains remarkably consistent across quality sources. Here’s how different preparation approaches affect the final nutritional value:

Preparation Method	Calories	Protein (g)	Fat (g)
Grilled (no oil)	132	28.2	1.3
Pan-seared (1 tsp oil)	158	28.2	7.8
Baked (no added fat)	132	28.2	1.3
Canned in water (drained)	99	22	0.7

Comparison Section

How does tuna steak stack up against other lean proteins? The comparison reveals why it’s a preferred choice for athletes and fitness enthusiasts. Here’s how it compares to similar proteins per 3-ounce serving:

Protein Source	Calories	Protein (g)	Fat (g)	Protein Efficiency*
Tuna Steak	132	28.2	1.3	21.4g/100cal
Chicken Breast	128	26	2.7	20.3g/100cal
Salmon Fillet	206	22	13	10.7g/100cal
Lean Ground Beef	180	24	9	13.3g/100cal
Turkey Breast	135	29	1.5	21.5g/100cal

*Protein Efficiency = grams of protein per 100 calories. Higher numbers indicate better protein-to-calorie ratio.

Tuna steak’s protein efficiency of 21.4g per 100 calories rivals turkey breast and exceeds most other animal proteins. The decisive advantage: tuna delivers this with virtually zero carbohydrates, making it superior for ketogenic and low-carb approaches where salmon’s 0g carbs don’t offset its higher calorie density.

Key Factors That Affect Tuna Steak Calories

1. Cut and Grade of Tuna

The specific tuna species and cut affect caloric content marginally. Bluefin tuna, yellowfin, and bigeye each have slightly different fat distributions. Our data reflects yellowfin (the most common commercial variety), which averages 132 calories per 3oz. Premium bluefin can run slightly higher (up to 150 calories) due to higher marbling, while skipjack tuna runs slightly lower at 120 calories per serving. The 132-calorie baseline remains consistent across standard commercial cuts.

2. Cooking Method and Temperature

Raw tuna and lightly seared tuna maintain the baseline 132 calories per 3oz. However, cooking method introduces variables. Grilling or baking without added fat preserves the exact nutritional profile. Pan-searing with oil adds roughly 25-40 calories depending on oil amount. Overcooking can concentrate the protein slightly (water loss), marginally increasing calories per ounce, though the 3oz serving remains consistent. The surprising finding: sous-vide preparation (vacuum-sealed at 125°F) actually preserves more moisture than high-heat grilling, keeping fat content identical while improving texture.

3. Fresh vs. Frozen Processing

This rarely discussed factor does matter: freezing and thawing can affect water retention. Improperly thawed tuna loses moisture, which concentrates nutrients slightly per ounce. However, our 3oz serving size normalizes this—whether fresh or properly thawed frozen, you’re getting the same 132 calories. Poor thawing (leaving room-temperature) can degrade protein quality, though caloric content remains unchanged.

4. Seasoning and Marinade Addition

Plain tuna steak contains zero carbohydrates. However, common marinades and rubs can alter the profile significantly. Soy-based marinades add 2-5g carbs (20-40 calories). Honey or maple glazes add 10-15g carbs (40-60 calories). Dry rubs with spices add negligible calories (under 5). For strict macro tracking, understanding your preparation method is critical—a honey-glazed tuna steak approaches 200 calories, while a salt-and-pepper grilled steak remains at 132.

5. Portion Size Accuracy

The 3-ounce (85g) serving size is standard, but restaurants often serve 5-8 ounces. A 6-ounce steak doubles the calories to 264, protein to 56.4g, and fat to 2.6g. This doesn’t scale perfectly—larger cuts can have slightly different fat distribution—but the 44-calorie-per-ounce baseline holds reliably. Digital kitchen scales eliminate guesswork: a true 3-ounce tuna steak is smaller than most restaurant portions.

Historical Trends

Tuna steak has remained nutritionally consistent over the past decade, with the 132-calorie, 28g-protein profile appearing consistently across USDA data and commercial nutrition databases since at least 2016. Unlike some foods affected by breeding and farming practices, wild-caught tuna varieties show minimal variation in macronutrients year-over-year.

What has changed: availability and quality. Over the past five years, sushi-grade and sashimi-grade tuna—marketed specifically for raw consumption—has become more accessible to home cooks. This affects preparation options but not the core nutritional data. Mercury content monitoring has intensified, leading to more stringent sourcing from sustainable fisheries, though this doesn’t alter the caloric profile.

The surprising trend: as of 2024-2026, farmed tuna has entered commercial markets more prominently. Farm-raised tuna contains marginally more fat (potentially 2-3g vs. 1.3g for wild-caught), meaning a 3oz serving could reach 150-155 calories. However, the 132-calorie figure remains the gold standard for wild-caught tuna steak, which dominates quality retail markets.

Expert Tips

Tip 1: Maximize Selenium Absorption with Vitamin C

Tuna steak’s 92 mcg selenium is outstanding, but absorption improves with vitamin C. Pair your tuna with citrus (lemon, lime), bell peppers, or tomatoes to enhance mineral bioavailability. The niacin content (18.8mg) also supports this pairing—these B vitamins synergize with fresh vegetables.

Tip 2: Strategic Meal Timing for Muscle Protein Synthesis

The 28.2g protein per serving hits the research-supported threshold for optimal muscle protein synthesis in most adults. Consume within 2 hours post-workout for maximum anabolic effect. Pairing with carbohydrates (rice, sweet potato) creates an ideal post-exercise meal despite tuna steak’s zero-carb baseline.

Tip 3: Raw Preparation Preserves Vitamin Content

While heat doesn’t significantly reduce the 132-calorie baseline, high temperatures can degrade heat-sensitive B vitamins. Sashimi-style preparation (zero-minute sear or completely raw) preserves 100% of B12 and niacin. If eating raw, source sushi-grade tuna from reputable suppliers to minimize parasitic risk.

Tip 4: Mercury Monitoring Across Tuna Varieties

Bigeye and bluefin tuna carry higher mercury content than yellowfin or skipjack, though nutritional data remains identical. Limit bigeye/bluefin to once weekly if consuming regularly; yellowfin can safely appear 3-4 times weekly per FDA guidelines. This doesn’t affect calories but critically affects long-term health.

Tip 5: Boost Fat Solubility with Complementary Fats

Tuna’s minimal 1.3g fat means fat-soluble vitamins (particularly vitamin D at 82 IU) absorb suboptimally without dietary fat. Add avocado, olive oil drizzle, or nuts to your tuna meal to optimize micronutrient absorption. This modest addition (50-100 calories) dramatically improves vitamin utilization.

FAQ Section

How Many Calories in a Tuna Steak Sandwich?

A standard tuna steak sandwich depends entirely on bread and condiments. A 3oz tuna steak (132 calories) on white bread (80-120 calories) with mayo (90-180 calories, depending on amount) totals 302-432 calories before additional toppings. Using whole-grain bread (100 calories) and light mayo (45 calories) brings the total to approximately 277 calories. The tuna steak itself contributes roughly 50% of total calories in a basic sandwich.

Is Tuna Steak Good for Weight Loss?

Yes, tuna steak is exceptionally weight-loss friendly for three reasons: (1) 132 calories per 3oz is extremely low for a complete protein source; (2) the 28.2g protein triggers satiety hormones, reducing overall calorie intake; (3) zero carbohydrates prevent insulin spikes that could trigger hunger. Studies consistently show high-protein, low-carb foods accelerate weight loss. A typical 4-ounce serving (176 calories) contains 37.6g protein—filling yet efficient calorically.

Can I Eat Tuna Steak Every Day?

Nutritionally, yes—the 132 calories, 28g protein, and minimal fat support daily consumption. However, mercury accumulation is the limiting factor. The FDA recommends yellowfin tuna up to 6 ounces per week. If eating tuna steak daily, limit to 1-1.5 oz portions or rotate with other fish varieties (salmon, mackerel, sardines). These alternatives offer similar caloric profiles (150-200 calories per 3oz) with lower mercury risk. Daily consumption of proper portions is safe; exceeding 6-8 oz weekly risks mercury accumulation.

How Does Tuna Steak Compare to Canned Tuna Nutritionally?

Canned tuna in water (drained) contains 99 calories, 22g protein, and 0.7g fat per 3oz—slightly lower in all macronutrients than fresh steak. The difference stems from processing and moisture content; canned tuna has less structural integrity. However, canned tuna offers consistent convenience and often lower cost. Canned tuna in oil approaches 180 calories per 3oz due to added fat, making it less favorable for calorie-conscious diets. Fresh tuna steak’s superiority: better texture, superior protein concentration, and zero processing additives.

Does Tuna Steak Have Omega-3 Fatty Acids?

This is where tuna steak disappoints relative to salmon. At 1.3g total fat per 3oz, tuna contains minimal omega-3s (approximately 0.3-0.4g EPA+DHA per serving), compared to salmon’s 1.5-2g per serving. Tuna’s excellence lies in protein density, not omega-3 content. If omega-3s are your dietary priority, salmon or mackerel are superior. If maximizing protein while minimizing fat and calories matters most, tuna steak remains unmatched. The two can complement each other—tuna three times weekly, salmon twice—for balanced micronutrient coverage.

Conclusion

Tuna steak’s 132 calories per 3-ounce serving, paired with 28.2g protein and virtually zero carbohydrates, makes it one of the most efficient protein sources available. Whether your goal is weight loss, muscle gain, or optimized nutrient density, the data consistently supports tuna steak as a dietary cornerstone. The 21.4g protein per 100 calories surpasses most competitors, while selenium (167% DV) and niacin (118% DV) deliver micronutrient value that simple calorie counts overlook.

The practical takeaway: treat tuna steak as a high-protein, low-calorie foundation for balanced meals. Pair it with fresh vegetables for vitamin C and fiber, add complementary fats for micronutrient absorption, and rotate fish varieties to manage mercury intake. A grilled or baked 3-ounce tuna steak delivers nutritional returns few foods can match—making it a legitimate staple for anyone serious about dietary optimization.

For accurate portion control and maximum nutritional benefit, use a kitchen scale to ensure you’re hitting the 3oz (85g) serving size, choose wild-caught yellowfin over farmed varieties, and prepare without added oils unless pairing with vitamin C or fat sources. Your 132 calories will deliver exceptional return on nutritional investment.

Related: Calories in chicken wings baked with skin – Nutrition

Related tool: Try our free calculator