Calories 540 % Daily Value * 38% Total Fat 25 g grams. Calorie breakdown: 44% fat, 36% carbs, 20% protein. This nutrition information is derived from testing conducted in accredited laboratories, published resources and/or information provided by McDonald’s suppliers. 'For a teeny sandwich, that's a lot of calories. About Food Exercise Apps Community Blog Premium. Amount of net carbs in Double Filet-O-Fish Sandwich: How much sugar is in Double Filet-O-Fish Sandwich? Amount of protein in Double Filet-O-Fish Sandwich: How much Calcium is in Double Filet-O-Fish Sandwich? After opening the box and seeing the size of the new filet (about as think as their regular hamburger) I can see why. There are 540 calories in one serving of McDonald's Old Bay Double Filet-O-Fish Sandwich. Additional nutrition information available upon request. 2,000 calories a day is used for general nutrition advice.
