I think that you can go to self.com to determine your personal calorie needs.
Calculate it yourself:
Multiply your weight by a factor of 13 to 16: 13 if you're sedentary, 14 if your daily activities keep you on your feet or you work out a couple times a week, 15 if you're a gym regular, 16 if you're extremely active. The product is the number of calories you need daily to maintain your weight.
To lose a pound a week, SELF magazine recommends that you eat 250 fewer calories per day (but don't go below 1200) and add 250 calories of exercise daily.