Calories come from Carbohydrates, Fats, and Proteins

Carbohydrates produce calories = 4 kcal/g

Proteins produce calories = 4 kcal/g

Fats produce calories = 9 kcal/g.

Units of heat

Kilocalorie, kilojoule

1 kilocalorie = 4.184 kilojoules

1 kilocalorie: is the amount of heat that raises 1 milliliter of water by 1 degree Celsius.

Daily calorie requirement for adults

Daily calorie requirement for adults = basic calories for the body's basic metabolism + calories needed for physical activity + calories needed to digest food.

Calories needed to digest food = 10% x (minimum essential calories needed for basic metabolism + calories needed for physical activity)

Adults' daily calorie needs = 1.1 x (minimum essential calories needed for basic metabolism + calories needed for physical activity)

Adults' daily calorie needs

Men: 9250- 10090 kJ

Women: 7980 - 8820 kJ

Note: The daily calorie intake from food should be not less than 5000 kJ - 7500 kJ, which is the minimum amount of energy needed to maintain normal life activities

The basic calorie requirement for basic metabolism of the human body Simple Algorithm

Woman: Basic calories (kcal) = weight (kcal)

Women: Basic calories (kcal) = weight (kcal)

Women: Basic calories (kcal) = weight (kcal) (kilograms) + 830

Over 60 10.4 x weight (kilograms) + 600

Men

18-30 years 15.2 x weight (kilograms) + 680

31-60 years 11.5 x weight (kilograms) + 830

Over 60 years 13.4 x weight (kilograms) + 490