One pound of body fat equals 3,500 calories, while 1 pound of whole-wheat bread contains 1,296 calories, Melvin H. Williams writes in the book "Nutrition for Health, Fitness and Sport." Bread options vary in caloric content.
One regular slice of wheat toast is approximately 24 grams while a large piece of toast is 38 grams, Williams calculates. According to the U.S. Department of Agriculture's My-Food-A-Pedia website, a regular slice of wheat toast contains 65 calories and a large slice packs 78.
White toast contains 69 calories per regular slice and 80 calories per large slice, My-Food-A-Pedia reports. Jelly adds 51 calories per tablespoon.
One regular slice of rye contains 64 calories, My-Food-A-Pedia calculates, while a large slice contains 83 calories. Butter adds 36 calories per teaspoon.
Sourdough toast contains 69 calories in a regular slice and 96 calories in a large slice, according to My-Food-A-Pedia. Low-fat cream cheese adds 35 calories per tablespoon.
Raisin toast packs 86 calories in a 29-gram slice, according to Williams. Tub margarine adds 34 calories per teaspoon, My-Food-A-Pedia adds.