For those of you who have the book (and i highly recommend it), the forumula, and a discussion of it, appears on Page 331.
Basically, you multiply your present weight by 10 if you ae a woman, 11 if you are a man. The total is the number of calories you will burn, with an "average" metabolism, during the course of the day if you do not do anything but wake up. Any moving around, including gettng out of bed, etc., will burn more calories.
Again, using me as an example, my weight is 161 X 10 = 1,610. Any activity will burn more calories than that - my aquajogging burns 325 calories in half an hour. On the days that I don't do that, I probably burn 1,850 calories. If I eat 800 calories a day, then there is a negative balance that applies to losing the weight. In theory, of course!!
If I don't have this straight, please correct me!!!