Calories, kilocalories, calories and kilojoules are all units of heat.
Calories (calories for short) are defined as the heat required to raise 1 gram of water 1 degree Celsius at 1 atmospheric pressure. 1 kcal is equal to 1000 kcal, which is about 4 186 joules. Calories, equivalent to kilocalories per kilogram of engineering units, are mostly used for nutrition measurement and fitness manuals.
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Calculation method of food calories
The calorie of food samples is defined as: when heating 1 ml (with a mass of 1 g), the required calorie is 4.8 1 7 joules for every increase of1degree Celsius. ?
(1) staple food: such as rice, porridge, noodles, etc. 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 and eggs: 37 grams of lean meat, 20 grams of fat meat, 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.
Vegetables: 600 grams of any vegetable equals 80 calories.
④ Seafood: 100g is about 80 calories.
⑤ Fruit: 300g watermelon and 2 oranges are 80 calories.
Baidu Encyclopedia: Food Calorimeter