A typical serving size, 2 ounces, of seaweed salad has approximately 70 calories, 4 grams of fat, 10 grams of carbohydrates, 50 milligrams of calcium, and 1 gram of protein.Eaten in moderation, seaweed salad can be enjoyed without breaking the calorie bank.ngredients in Seaweed Salad. Seaweed salad is most commonly sesame flavored and the wakame seaweed is not surprisingly seasoned with sesame oil as well as sesame seeds. Other seasoning components are red pepper flakes, vinegar, salt and cloud ear (kikurage) mushrooms.