For example, 7000 kcal coal means that the calorific value of coal is 7000 kcal/kg, which is equivalent to engineering.

A unit of heat. 1 calorie = 1000 calories, which are mostly used in nutrition measurement and fitness manuals.

For example, if the temperature of 1kg pure water increases or decreases 1 degree Celsius, the heat absorbed or released is 1 calorie. A big card is a thousand cards (officially, it should be a big card). Used to evaluate the quality of fuel, one kilogram of fuel can raise X kilograms of water by 1 degree Celsius, which means that the calorific value of this fuel is X calories.

Generally speaking, the daily calorie consumption of adults is about 2200-2400 kcal for men; Female: 1900-2 100 kcal or so.

In order to maintain normal body temperature, blood circulation and breathing, the human body consumes more than 1200 kcal of energy. Therefore, normal healthy people will consume more than 400 calories in 24 hours.

Adults need at least 1500 calories a 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.

Extended data

Precautions:

Basal metabolic consumption varies with individual height, weight, age and gender. Human survival needs energy, which is obtained from food.

1 calorie is equal to 4.2 joules, and the unit of heat is converted into: 1 kcal = 1 kcal =4. 1868 kilojoules (kJ)= 1 calorie/g.

Its relationship with Joule is: at 20℃ 1 calorie = 4. 1868 J.

Some countries use 15℃ cards. Its relationship with Joule is:1calot15℃ = 4.1855j.

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