If you are a girl you should have 1,900 calories per day and if you are a boy you should have 2,100 calories per day. Try this if you want to maintain your weight. If you want to lose weight maybe you should eat about 1,500 calories to 1,700 calories. Try not to eat less than 1,200 calories per day because you will not be happy about it. Always remember don't skip a meal if you want to be fit. Research shows that those who skip meals are less healthy than those who eat 3 meals a day. If you skip a meal you will be more likely to eat more snacks throughout the day. I hope you are satisfied with my answer.