1 kcal = 4. 184 kj.

Adult male light and moderate manual workers need 2400-2700 calories a day; The daily energy requirement of female light and moderate manual workers is 2 100-2300 kcal. Babies, children and adolescents, pregnant women and nursing mothers, and the elderly have different physiological characteristics and different energy needs.

Daily calorie requirement of adults

Male: 9250- 10090KJ

Female: 7980-8820 kJ

Note: The daily calories provided by food should not be less than 5,000-7,500 kilojoules, which is the least energy to maintain normal life activities.

Extended data:

Calorie (Cal for short), transliterated from English Calorie, is defined as the heat required to raise 1 gram of water to 1 degree Celsius at 1 atmospheric pressure; Calorie is an energy unit, which is still widely used in nutrition measurement and fitness manual. The international standard unit of energy is joule. As the legal unit of food calories, joules are widely used in Europe, while calories are used in the United States. Although Joule is the legal unit in Chinese mainland and Taiwan Province Province, it is still widely used in Chinese mainland and Taiwan Province Province because of tradition.

Calories are units of energy. We often associate calories with food, but in fact they apply to any substance that contains energy.

Simply put, 1 calorie of energy or heat can raise the temperature of 1 gram of water by 1 degree Celsius at one atmospheric pressure. 1 calorie is approximately equal to 4. 186 joules (joules are commonly used units of energy in physics).

References:

Baidu encyclopedia-calories