Calculating calories in bread
I'd like some confirmation that my method for calculating the calories in the breads I make is correct. It seems quite straightforward, but I want to make sure I'm not missing something.
I simply add up the calories of all of the individual ingredients. Then I divide the total ingredient calories by the total weight of all of the baked loaves after they have cooled. For basic sandwich type breads that contain fats, sugars, and maybe eggs, I generally end up with about 2.8 calories per gram of baked bread. Breads that contain only flour, water, and salt, such as french bread, generally yield around 2.27 calories per gram. For Hamelman's Olive Levain, I end up with 2.44 calories per gram.
The bread in the image is a 13x4x4 inch pullman loaf made using the Classic 100% Whole Wheat Bread recipe from the King Arthur Flour web site. I calculate 2.82 calories per gram of baked bread. The slice you see in the image weighed 59 grams; 166 calories if my calorie calculation method is correct. I usually cut a bit thinner, ending up with about 50 to 52 grams per slice, and a calorie count of 141 to 147 calories per slice.
Am I calculating the calories per gram correctly?
One reason I'm wondering is that the calorie burden I calculate for my breads doesn't compare very closely to the calorie counts listed for various types of bread on a calorie counting website. One site, for example, shows 100 grams of plain white bread having 266 calories, 2.66 calories per gram. Whole wheat bread is listed as 256 per 100 grams. That same site lists French Bread at 274 per 100 grams, which is a lot more than the 2.27 calories per gram that I always get.