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How to calculate the calories of food

9 People involved  2021年04月03日 12:35  classification : What to eat to lose weight  comment

How to calculate the calories of food

Generally, it can be checked by the food composition table, and it can also be used for accurate measurement with a calorimeter. The sample to be tested is put into the combustion chamber of the calorimeter to completely burn, and water absorbs all the energy released. Under normal pressure, one milliliter of water rises by one degree. , Need to absorb 4.187 joules, record the water quality and water temperature changes, and convert accordingly.

   The calorie of a food sample is defined as: 1ml (mass of 1g) when heated per 1 degree Celsius, the required calorie is 4.817 joules.

① Staple foods: such as rice, porridge, and noodles. If 80 kcal is used as a unit of calculation, a 1/4 bowl of rice, half a bowl of porridge or half a bowl of noodles in a common daily life is equivalent to 80 calories. Kcal.

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

  ③Vegetables: 600 grams of any vegetable is equal to 80 kcal.

  ④Seafood: about 100 grams is 80 calories.

  ⑤ Fruits: 300 grams of watermelon and 2 oranges are both 80 calories.

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