Joule-Calories:

1 kcal = 4. 184 kj.

1 KJ)=0.239 kcal.

1 card =4. 184 joules.

1 joule =0.239 calories.

Joule-Watt:

1 joule (J)= 1 watt× second (w s).

1 degree (1 kwh) = 3.6× 10 6 joules.

Standard thermal unit:

1 calorie =4. 19 The estimated food supply per capita in people's consumption during the joule reference period. These figures are expressed in calories, protein and fat. The unit of heat is calories. Until the recommended thermal unit "kilojoule" (1 calorie =4. 19 joule) is widely understood and accepted, the traditional thermal unit will be adopted.

Calories, also known as capital letter C, are most commonly used in food labels, which is equivalent to the heat required to raise 1 000 grams of water from 14.5 degrees Celsius to 15.5 degrees Celsius at1atmospheric pressure, which is about 4 186 joules.

Refer to the above content: Baidu Encyclopedia-Thermal Unit