Subway Tuna Sandwich: Calories and Nutrition
ChatGPT 
Claude 
AI Mode 
Perplexity Subway Tuna Sandwich: 560 calories, 42 g carbs, 27 g protein and 32 g fat per 1 Subway Tuna 6-inch sub, standard build as listed in Subway's guide (233g).
Quick Nutrition Facts
Per 1 Subway Tuna 6-inch sub, standard build as listed in Subway's guide (233g)
| Nutrient | Amount |
|---|---|
| Calories | 560 kcal |
| Protein | 27g |
| Carbohydrates | 42g |
| Fiber | 2g |
| Sugars | 4g |
| Fat | 32g |
| Saturated Fat | 9g |
| Sodium | 920mg |
| Selenium | 55mcg |
| Vitamin B12 | 2.4mcg |
Macronutrient Breakdown
NUTRITIONIST INSIGHT
Tuna is an exceptional source of complete protein and omega-3 fatty acids that support heart health and reduce inflammation. The selenium in tuna supports thyroid function and antioxidant defense. Request light mayo to reduce saturated fat while preserving protein benefits.
See all 13 Subway items compared in the Subway calories chart.
Subway Tuna Sandwich Sizes and Calories
The Subway tuna order swings by more than 500 calories depending on how you build it, because the tuna mix and the bread carry most of the load.
| Build | Calories | Protein |
|---|---|---|
| 6-inch sub, standard build as listed in the panel above | 560 kcal | 27 g |
| Footlong sub (Subway counts a footlong as two 6-inch servings) | 1,120 kcal | 54 g |
| Wrap | 910 kcal | 39 g |
| Protein bowl | 730 kcal | 39 g |
| Salad | 400 kcal | 21 g |
The figures come from Subway's U.S. Nutrition Information, October 2026, which also carries the rule that a footlong equals two 6-inch servings. The guide gives no build footnote for the 6-inch table, so treat the sub figure as Subway's standard listing and not a custom order. Ordering outside the US gives different numbers.
Two levers matter. The tuna mix is one: Subway lists the tuna portion alone at 250 calories and 23 g of fat on a 6-inch, because it is already blended with mayonnaise before it reaches the counter. That is why this sub has more fat than a Subway turkey breast at 470 calories and stays close on protein (27 g against 25 g). Bread is the other: the tuna salad, with no bread, is 400 calories. Plain cooked tuna is 132 kcal and 29 g protein per 100 g, so the fish is not the problem. Sodium is the number to watch: the 6-inch lists 920 mg, and a footlong doubles it.
Myth Busters
MYTH #1: Tuna Sandwiches Cause Weight Gain
TRUTH: A 6-inch Subway Tuna is 560 calories with 27g protein, and 32g of that is fat from the mayo-blended tuna, so it is not a light sub. Weight gain comes from the total calories across the day. The protein helps with fullness, and the tuna salad at 400 calories is the lighter way to order it.
MYTH #2: All Canned Tuna Has High Mercury
TRUTH: Canned light tuna used in Subway sandwiches has 1/3 the mercury of fresh ahi tuna. Eating 1-2 tuna sandwiches weekly is safe; the benefits of omega-3s outweigh minimal mercury exposure.
MYTH #3: Tuna Has Zero Carbs
TRUTH: While tuna flesh is carb-free, the complete Subway sub has 42g carbs from the bread. Choose whole wheat bread (GI 50-56) over Italian herbs & cheese (higher GI) to improve blood sugar response and fiber content.
MYTH #4: Tuna Cholesterol Intake Is Dangerous
TRUTH: Tuna is low in cholesterol (60mg per sandwich) and high in omega-3s that improve cholesterol ratios. The fiber from bread and vegetable additions further supports healthy cholesterol metabolism.
MYTH #5: Fast Food Tuna Isn't Real Tuna
TRUTH: Subway uses skipjack and yellowfin tuna blended with mayonnaise. The FDA strictly regulates tuna labeling. It's legitimate fish with legitimate nutritional benefits.
MYTH #6: Pregnant Women Can't Eat Tuna
TRUTH: Pregnant women can safely eat 2-3 servings of light tuna per week. The omega-3s and B vitamins support fetal brain development; mercury levels in canned tuna are below concern thresholds for occasional consumption.
NutriScore by Health Goals
| Health Goal | NutriScore | Why This Score? |
|---|---|---|
| Weight Loss |  | 560 calories, 27g protein, 32g fat, 2g fiber. Choose 6-inch, skip cheese and extra sauce, add vegetables, or order the 400 calorie salad. |
| Muscle Gain |  | Good 27g complete protein with all amino acids; omega-3s reduce inflammation. Post-workout timing aids glycogen replenishment from 42g carbs. |
| Diabetes Management | | Choose whole wheat bread (GI 50-56), skip added sugar sauces, load vegetables for fiber. Protein slows glucose absorption; pair with salad for extended digestion. |
| PCOS Management | | High protein (27g) supports insulin sensitivity; omega-3s reduce inflammation. Limit mayo to 1 tablespoon, add vegetables, choose whole grain bread. |
| Pregnancy Nutrition |  | Rich in omega-3s (DHA) essential for fetal brain development; B12 supports red blood cell formation. |
| Viral/Flu Recovery | | Protein aids immune cell production and tissue repair; selenium supports immune function; easy to digest and appetizing when appetite is low. |
PERSONALIZED NUTRITION
Track your meals with NutriScan for personalized NutriScores based on your specific health goals!
Blood Sugar Response to Subway Tuna
Understanding bread choice and pairing strategies helps stabilize blood glucose.
Typical Glucose Response Curve
This chart shows typical blood glucose response for general healthy individuals. Individual responses may vary. Not medical advice.
How to Flatten the Spike
Pairing tuna sandwich with vegetables and choosing whole grain bread slows glucose absorption:
- 🥒 Load vegetables (lettuce, tomatoes, peppers, cucumbers) - Adds fiber; delays carb absorption
- 🌾 Whole wheat or 9-grain bread - Lower glycemic index than Italian herbs & cheese
- 🥬 Side salad - Extra fiber and satiety without spike
- 💧 Drink water - Hydration aids digestion; avoid sugary drinks
This combination extends energy release and prevents afternoon energy crashes.
Cultural Significance
Tuna has been a staple protein source across global cuisines for centuries, especially in coastal regions and island cultures.
In India:
- Coastal communities (Kerala, Goa, Karnataka) use tuna in curries and grilled preparations
- Fresh tuna is traditional in Hindu temple offerings
- Modern fast-food adaptation introduces convenience without sacrificing protein quality
- Growing demand for convenient, protein-rich meals aligns with fitness and nutrition awareness
Global Impact:
- Tuna is the third most-consumed fish globally (1.7 million metric tons annually)
- Sustainability concerns drive innovation in aquaculture and sourcing
- Fast-food chains enable accessible omega-3 consumption for working populations
- One of the most economical protein sources available worldwide
Compare & Substitute
Subway Tuna vs Similar Fast-Food Proteins (Per Serving)
| Nutrient | 🐟 Subway Tuna | 🍗 Subway Grilled Chicken | 🐔 KFC Original Recipe Breast | 🍗 Popeyes Chicken Sandwich |
|---|---|---|---|---|
| Calories | 560 kcal | 510 kcal | 390 kcal | 700 kcal |
| Protein | 27g | 31g | 39g | 28g |
| Carbs | 42g | 43g | 11g | 50g |
| Fat | 32g | 24g | 21g | 42g |
| Fiber | 2g | 3g | 2g | 2g |
| Sodium | 920mg | 830mg | 1,190mg | 1,440mg |
| Best For | Fish option | Most protein per sub | Most protein, fewest carbs | Crispy texture |
Frequently Asked Questions
Is Subway Tuna good for weight loss?
Yes, when prepared mindfully. At 560 calories with 27g protein and 32g fat, the 6-inch sub fits a weight loss day only if the rest of the day is light; the 400 calorie tuna salad is the easier fit. Protein is the most satiating macronutrient, and tuna's biological value is exceptionally high.
Best practices: Choose 6-inch over footlong; request light mayo (half the usual amount); load vegetables; pair with water or unsweetened tea; avoid chips and sugary drinks.
Can diabetics eat Subway Tuna?
Absolutely, with smart bread and topping choices. The protein slows gastric emptying and delays glucose absorption.
Tips for diabetics:
- Choose whole wheat, 9-grain, or multigrain bread (GI 50-56)
- Request light mayo and no added sugar sauces
- Load vegetables (spinach, tomatoes, peppers) for fiber
- Monitor portion: 6-inch is sufficient; skip the footlong
- Test blood sugar 2 hours after eating to understand individual response
How much omega-3 is in Subway Tuna?
Tuna is a source of omega-3 fats, but Subway does not publish an omega-3 amount for its Tuna sandwich. Omega-3s reduce inflammation and support cardiovascular health. Aim for 1-2 tuna sandwiches weekly as part of a balanced diet.
Combine with fatty fish (salmon, mackerel) and plant sources (flax seeds, walnuts) for cumulative benefits.
What are the main health benefits of Subway Tuna?
Key Benefits:
- Complete Protein: 27g with all nine essential amino acids; supports muscle maintenance and recovery
- Omega-3 Fatty Acids: Reduce inflammation and support cardiovascular and brain health
- Selenium: Supports thyroid and antioxidant function
- Vitamin B12: Critical for energy and red blood cell formation
- Convenience: Complete meal in under 5 minutes; ideal for busy professionals
- Versatility: Customizable for different health goals by adjusting bread, mayo, and vegetables
Is Subway Tuna mercury-safe?
Canned light tuna (used in Subway) contains 0.1 ppm mercury, one-third that of fresh ahi tuna at 0.32 ppm. Consuming 1-2 tuna sandwiches per week is well within FDA safe limits.
Special populations:
- Pregnant women: Safe to eat 2-3 times weekly; consult OB/GYN
- Young children: Can eat 1-2 times monthly; smaller portions
- Nursing mothers: Benefits of omega-3s exceed minimal mercury transfer
When is the best time to eat Subway Tuna?
Depends on your goal:
- Weight Loss: Lunch (12-1 PM) or early afternoon (3-4 PM) to prevent evening snacking
- Muscle Gain: Post-workout (within 2 hours) for glycogen replenishment and protein synthesis
- Diabetes Management: Mid-morning or lunch paired with vegetables; avoid late night
- Energy: 2-3 hours before activity for sustained fuel
Avoid eating alone on empty stomach; pair with fiber and water for optimal digestion.
How many calories are in a Subway tuna sandwich?
A 6-inch Subway tuna sub is 560 calories with 27 g of protein, 42 g of carbs and 32 g of fat, as listed in Subway's U.S. nutrition guide (October 2026). A footlong is double, 1,120 calories. The tuna salad is 400 calories with 21 g of protein, and the tuna protein bowl is 730 calories with 39 g of protein.
Is Subway tuna healthy?
A Subway Tuna 6-inch sub (233g) has 560 kcal, 27 g of protein and 32 g of fat. It also has 920 mg of sodium.
How much protein is in a Subway tuna sub?
A Subway Tuna 6-inch sub (233g) has 27 g of protein. It also has 560 kcal.
How many calories are in a 6 inch Subway tuna sub?
A Subway Tuna 6-inch sub (233g) has 560 kcal as listed in Subway's guide. That includes 42 g of carbohydrates and 32 g of fat.
Similar Nutritious Sandwich Options
4505 Chicharrones Classic Chili Salt
7 Eleven Japan Crispy Corn Cheese
Explore More Nutrition Tools & Resources
AI Calorie Counter App - Snap a Photo, Get Macros
AI Nutritionist App That Reads Your Logged Meals
Best Protein Supplements for Women
Bulking Meal Plan App That Sets Your Surplus
ChatGPT Calorie Counter Alternative That Keeps the Total
ChatGPT Diet Plan Alternative That Tracks What You Eat
ChatGPT Weight Loss Coach Alternative With a Food Log
Fast Food Calorie Counter App That Reads the Tray
Free Calorie Tracker App with AI Photo Scans | NutriScan
Indian Diet Plan App With Veg and Non Veg Meals
Indian Food Calorie Calculator - Get Instant Nutrition Facts for Desi Meals — 2026
Intermittent Fasting for Women, Timer and Meal Log App
Intermittent Fasting Tracker App - Free Fasting Timer
Macro Tracker App That Fills the Numbers From a Photo
Mediterranean Diet Meal Plan App That Counts the Oil
Micronutrient Tracker App for Vitamins and Minerals
MyFitnessPal Alternative That Stays Free | NutriScan
NutriScore App: A Free Grade on Every Meal | NutriScan
Nutrition Label Scanner App for the Amount You Ate
Second Trimester Protein Guide
Vegetarian Meal Plan App With a Protein Target
Voice Calorie Counter - Speak to Track Meals Hands-Free
Water and Calorie Tracker App - Free Water Log