You need to burn around 7716 calories to loose 1 kg. So for 5 kgs its 38580 calories. Considering 30 days in a month, so for 1 day its around 38580/30 = 1286 calories. As per recommendations, its not good to loose more than 2 pounds (almost 1 kg) per week (note: 2.2 pounds = 1kg).
3,500 calories = 1 pound of body fat
None at all. xD
at least 300 calories per day
poo for a long time
There are a lot of calories that one could lose in a day simply by walking. On an average day, one could hope to lose about 500 calories by walking. It takes 3500 calories lost to lose a pound.
1900 calories to lose weight
1,500 calories a day
A pound of fat is generally around 3500 calories, so to lose a pound of fat a week you would need to lose 500 calories a day
3500 calories equal 1lb of fat. So a reasonable weight loss is to cut out 500 calories a day and lose an average of 4lbs per month. To answer the question as is, she needs to cut out 1500 calories a day. That's the basics. Of course you can sit down and figure out Basic Metabolic Rate and how many calories it takes to maintain that 200 lb weight each day, then cut out calories from there. There is a formula out there for that.
You could only eat about 2100 calories a day.
1500 calories
It takes a reduction of 3500 calories to lose a pound. So, many people cut 500 to 1000 calories a day to lose 1-2 pounds at week.