4 kilocalories a day is normal.

Adults need at least 15 calories of energy every day to maintain their body functions, because even if they lie still, the body still needs energy to maintain body temperature, cardiopulmonary function and brain operation. Aerobic exercise for about 6 minutes a day can control your weight. If you need to reduce body fat, aerobic exercise for more than 9 minutes a day. The intensity of each aerobic exercise is controlled within the range of 6%~7% of the maximum heart rate.

Extended data:

Basal metabolic consumption will be different due to the differences of individual height, weight, age and sex. Human beings need energy to survive and get it from food.

4, calories are generated by carbohydrates = 4 calories/g, protein = 4 calories/g, and fat = 9 calories/g. Food is generally composed of these three substances. Therefore, as long as we know the contents of these three substances in food, we can know how many calories or how much energy food contains.

Baidu encyclopedia-calories