Subway Tuna Mayo
A Subway Tuna Mayo has 377 calories, around 19% of a 2,000-calorie day. It delivers 21.8g of protein (5.8g per 100 calories) and 38.2g of carbs, with 14.5g of fat. See the full breakdown below, then build your complete order in the calculator to see live totals as you customise size, protein and toppings.
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Frequently Asked Questions
How many calories are in a Subway Tuna Mayo?
A Subway Tuna Mayo has 377 calories, about 19% of a typical 2,000-calorie day. Use the calculator to adjust the size, protein and toppings and see the total change live.
How much protein is in a Subway Tuna Mayo?
A Subway Tuna Mayo has 21.8g of protein, which works out to 5.8g of protein per 100 calories.
How many carbs are in a Subway Tuna Mayo?
A Subway Tuna Mayo has 38.2g of carbohydrates, including 4.4g of sugar and 3.6g of fibre.
How much fat is in a Subway Tuna Mayo?
A Subway Tuna Mayo has 14.5g of total fat, of which 4.5g is saturated fat.
Is a Subway Tuna Mayo healthy?
A Subway Tuna Mayo has 377 calories and 21.8g of protein (5.8g per 100 calories). That's a reasonable protein-to-calorie ratio. Whether it suits your day depends on your goals. Use the calculator to lighten it up by changing the size, protein or toppings.
Is a Subway Tuna Mayo keto-friendly?
With 38.2g of carbs, it's high in carbs for keto, using most or all of a day's carb budget. To cut carbs, order it as a bowl or salad without rice or tortilla and load up on protein and salad.
Nutritional Information
Where the calories come from
Nutrition figures are from Subway's published Australian nutrition data (last updated 27 June 2026) and may change. Always check the latest in-store information.