The amount of weight that you can lose will depend on how high your body fat percentage is. First, calculate how much weight your goal weight is and then determine what your BMI (Body Mass Index). Your BMI indicates how much weight we should lose to achieve our goal. If your BMI is 25 or greater, you're overweight. If your BMI falls below 30 you are considered obese.
Your BMI is calculated at 28.7 if your weight is 200. To drop to a healthy range of weight, you will need to lose approximately 70 pounds. To see if you're overweight, visit www.healthyminds.com/bmi/.
This formula can be used to calculate how many pounds you will lose each week once you have determined your BMI.
(Your Goal Weight - Current Weight)/BMI * 7 Number Of Pounds Lost Per Week
To lose 50 pounds in a month, you would need to exercise for 2 weeks. That's 56 days divided by 7 pounds per day. That works out to 8.3 pounds lost per week.
You could also try this calculator from www.weightlosscalculator.net. It provides an estimate of the number of calories you should consume each day to lose 12 pound per week.