Calorie calculation is to calculate the calories of related data. The calorie calculation in fitness mainly includes daily intake calorie calculation, daily metabolic calorie calculation, daily exercise calorie calculation and weight loss calorie calculation. By counting calories, it is easier to lose fat. Because the principle of reducing fat is to create a calorie gap, if we don't calculate the calories above, we don't know what the gap is, which directly leads us to not know how to adjust our exercise plan, which will lengthen the time of reducing fat.