While determining how many calories each individual should eat for successful and healthy weight loss isn’t exactly rocket science, it can be pretty darn confusing. So for those who want a deeper understanding, “Calorie Calculations 101” explains the formulas, mathematics, and general nuts and bolts. www.sparkpeople.com/resource/calorie_calcu
It is important to eat within your range to help you reach your weight loss goals as you have set them up. Your body is designed to protect itself from starvation during times of greatly-reduced food availability. So when you eat too little, your body thinks it's starving. To compensate, your metabolism will slow down considerably, making it very difficult (or impossible) for you to lose weight. In this state, your body will preferentially burn everything but your stored body fat. This link will explain more. www.sparkpeople.com/community/ask_the_expe
It could be that you would do better eating small meals more frequently for a little while making adjustments. It is also beneficial to aim for the lower end of your range a few days and the top end on other days instead of sticking with one specific level that causes the body to adjust and could stall your progress. This article provides some things to consider before you delve into the world of mini meals. www.sparkpeople.com/resource/nutrition_art
Hope that information helps.