There are three methods to find out how many calories you should eat for maintenance. The first is to use a calorie calculator, which will estimate maintenance calorie needs based on your sex, age, height, and weight. The second method is to log the foods you currently eat each day in a nutritional calculator for a week and then take the average. However, this only works if your weight is stable and you don't change your diet from what you normally eat (which often happens when people are told to count.) The third, and most accurate method, is to track your weight over several weeks along with your calorie intake and then make a calculation. I explain how to do that in the How To Calculate Calorie Maintenance After Dieting section of this guide.