1, the difference of unit definition: kilojoule is the unit of heat, joule is abbreviated as coke, which is the unit of heat and work in international units, kilojoule refers to one kilojoule, and kilokcalorie is also called calorie, which is equal to 1000cal (calories), that is, 1kg water temperature rise/kloc. Translated from English Calorie (abbreviated as cal), it is defined as the heat required to raise 1g water at 1 atmosphere.

2. Differences in usage scenarios: kilojoule is the international standard energy unit, which is Joule. It is commonly used to measure the calories contained in food and the calories consumed in a certain exercise unit time. People control their weight by controlling the calories consumed in food and exercise. The international standard energy unit is Joule, while kilocalorie and calorie are energy units, which are still widely used in nutrition measurement and fitness manuals, and are not international standard energy units.

3. A kilocalorie, also known as a calorie, is a kind of energy unit, which is widely used in the fields of nutrition and physics, and it is a thousand times of the calories per unit of calories, that is, 1 kilocalorie equals 1000 calories. In nutrition, kilocalories are often used to indicate the calorie content of food, while in physics, it is used to measure various forms of energy conversion.