How many calories should a 235 pound 5' 7 female eat per day and how many calories per day to lose weight?

It depends on your metabolic weight and what you want to weigh. The average metabolic rate is about 10 calories per pound per day. Thus, the average 250-pound person eats 250 x 10 = 2500 calories per day. Of course, your metabolic rate may be different. Let's say your metabolic rate is 7 calories per pound per day. Then at 250 pounds you'd be averaging 7 x 250 = 1750 calories per day. If you want to weigh, say, 200 pounds, and your metabolic rate is, say, 10 calories per pound per day, then you should eat 200 x 10 = 2000 calories per day.