This is an easy to answer question. You should eat less calories than you burn. It means you must have calories deficit to lose weight. Many people become calorie maniacs as they are counting and calculating calories on a daily basis. I suggest you to stay away from calculators etc.
First there is a difference between k.C and calories. On some product labels, only kC are shown. You should be able to obtain the C cont in order to make a proper calculation.
