Heat is measured by the units of calorie and Joule (J)

Heat is indeed measured in units of calories and Joules. A calorie is the amount of heat required to raise the temperature of one gram of water by one degree Celsius. On the other hand, a Joule is the unit of work or energy in the International System of Units. It is equal to the energy transferred or work done when applying a force of one newton through a distance of one meter.

In terms of relation, 1 calorie is approximately equal to 4.184 Joules. This means that Joules represent a larger quantity of heat than calories.

In practical applications, calories are often used in the context of heat in food and diet, while Joules are used in physics and general scientific applications.