Calories come from carbohydrates, fats and protein.

Heat generated by carbohydrates = 4 kcal/g.

Heat generated in protein = 4 kcal/g.

Heat generated by fat = 9 kcal/g

1. Staple food: such as rice, porridge and noodles. If 80 calories are taken as the calculation unit, the calories of 1/4 bowls of rice, half bowls of porridge or half bowls of noodles commonly used in daily life are equivalent to 80 calories.

2, meat, tofu, eggs: 37 grams of lean meat and 20 grams of fat is 80 calories. 125 grams of milk, two teaspoons or half a tablespoon of oil are 80 calories. It is worth noting that the calorie of 1 boiled eggs is 80 calories, but the calorie of 1 fried eggs is 120 calories.

3. Vegetables: 600 grams of any vegetable equals 80 calories.

4, seafood: 100 grams about 80 calories.

5. Fruit: 300 grams of watermelon and 80 calories of two oranges.

Extended data:

Daily calorie requirement

1, the daily calories required by adults = the basic calories required for basic metabolism of human body+the calories required for physical activity+the calories required for digesting food.

2. Calories required for digesting food = 10% x (minimum calories required for basic metabolism of human body+calories required for physical activity).

3. Adults' daily calories = 1. 1 x (minimum basic calories required for basic metabolism of human body+calories required for physical activity).

Male: 9250- 10090KJ

Female: 7980-8820 kJ?

Baidu encyclopedia-food heat meter

People's Network-How many calories do adults need in a day?