To maintain weight you have eat 2000 calories a day, how much would this have to be cut down for me to lose 2lbs per week?

7000 calories/wk: It takes 3500 calories to gain or lose 1 pound. You would have to eat 1000 cal/day less than you do now to lose 2 lbs in 1 week. The number of calories you need to maintain your weight depends on your age, size, and level of activity. 2000 cal a day is correct for a male weighing about 185 lbs and doing regular physical activity. A female, weighing 140 lbs, doing little exercise needs 1200-1400.