Calorie is the unit of human calorie intake, calculated in kilojoules 1 calorie =4. About 18 kJ, I usually calculate it as 1 card =4 kJ. The calorie value of general food is calculated by how many kilojoules per100g. Shopping should be judged according to the weight of food.

For example, if you buy 300 grams of potatoes and 20 grams of chocolate, of course, the calories of chocolate are small, because there is no 100 grams of chocolate, which is about 550 calories. Potatoes are 70 calories per 100, and 20 grams of chocolate is at most 1 10, but potatoes are 2 10. Of course, eating potatoes will make you feel full for a long time, or eating this will help you lose weight.