That would depend on the speed.
It take about 3500 calories to burn 1 pound of fat. So that would mean that if you lower you caloric intake by 500 calories in a week you would lose about 1 pound.
1 pound of body fat= 3500 calories .45 calories/hour for every pound of body fat 150 lb person= 67.5 calories/hour 3500/67.5= 51.852 hours (rounded)
around a pound a week 3500 calories equals a pound of body weight
500 extra calories would be an extra pound of weight every 7 days (3,500 calories is equal to one solid pound of weight). That is about 4 to 4.5 pounds every month.
I'm not quite sure what you are asking, but if you are asking how many calories are in a pound, then the answer is 3,500 calories make one pound.
You would think that if you eat one pound you would gain one pound....but that's not true...it depends on the calories. Butter has more calories
3,500 calories is a pound so 1,000 would be less than half of a pound.
A pound of butter has more calories than a pound of meat. This is because for every gram of fat, there are 9 calories. For meat, every gram of protein has 4 calories.
A pound of grapes only contains about 310 calories. The basal metabolic rate, the amount of calories needed to sustain a given weight, is roughly 10 calories per pound. An individual weighing 150 pounds for instance would require 1500 calories a day just lying down in order to stay the same weight. 310 calories does not even get close. The 150 pound person would have a loss of 1190 calories a day. A pound of fat has 3500 calories. Over 31 days our 150 pound person loses out on 36,890 calories or about 10 pounds.So, a person would slowly starve on this diet. Not to mention the nutritional disaster that eating only grapes for a month would wreak. These are all rough estimates and any individual's metabolism and weight would have an effect on the data. Also, the body does not necessarily go after fat reserves alone while starving. Muscle tissue is also consumed in order to continue vital functions.
There are 3500 calories in one pound. Cutting 500 calories a day would make you lose one pound each week.
It would take 7 weeks. Though when trying to gain weight the same principles tend to apply as losing it. I.E. Try to gain about a pound a week.
You would have to consume 1200 calories and do regular exercises to lose the weight you desire