calories in a slice of bread
A single slice of commercially prepared whole wheat bread (shown on label) provides almost 70 calories, and about 1 gram of fat. The slice also provides almost 4 grams of protein and 11.6 grams of carbohydrate. But since it also provides about 2 grams of fiber, you'll only consume about 9.6 net carbs per slice.
Calories From Carbohydrates. White bread made from refined flour contains 14.72 grams of total carbohydrates in one slice. This amount of carbs equals 58.88 calories, which is 74 percent of the total calories. A slice of white bread only has 0.8 grams of fiber and 1.52 grams of sugar, so most of the carbs consist of starches.