Dropping one full jeans size is not exactly an easy task, especially if you take into account the number of calories that must be burned in order to obtain this goal.
It takes about a 15 pound loss in order to drop one full jeans size. One pound of fat is equal to 3,500 calories. Therefore, you would need to burn around 52,500 calories to be able to drop one jeans size. And, these calories would need to be in excess of the total amount of calories that are taken into the body during the day through food and drink. In other words, if you wishe to drop a jeans size in 30 days and consume a normal daily diet of 1,200 calories, an additional 36,000 calories would need to be burned during that month on top of the 52,500 calories noted before.
So, on average, you would need to burn a total of approximately 2,950 calories per day for 30 days in order to be able to lose the full jeans size. This difficult task becomes more accessible if the goal is to drop one full jeans size in three to six months, of course.