How Many Calories in a Whole Tuna Sandwich on Wheat?

Although tuna and whole-wheat bread are both relatively low in calories, trouble starts when you add mayonnaise to the mix. Commercially-prepared tuna sandwiches tend to be high in this fatty ingredient, and may also be served on oversized bread for a one-two calorie punch. To spare your waistline, make your tuna sandwiches at home using moderate portions and lean ingredients.

Sticking to whole wheat bread and light mayo can keep your tuna sandwich healthy. (Image: bhofack2/iStock/Getty Images)

Calorie Count

At a restaurant, a whole tuna sandwich on wheat may contain up to 600 calories, depending on the recipe and size. However, homemade versions can be far lighter. Using two slices of whole-wheat bread, 3 ounces of water-packed tuna and 1 tablespoon of light mayo, you'll create a sandwich of about 310 calories. Mixing chopped celery or shredded carrots into the tuna won't add significant calories, but will add nutrition for a more-balanced meal.