In what units is the amount of heat measured?

As you know, heat is energy that is transferred during heat exchange. According to international rules SI (international system of units of measurement), the amount of heat energy, that is, heat is measured in Joules, and is denoted as [J]. This unit of measurement is the most common and used in calculations. However, this unit of measurement is not the only one, many have probably heard that the amount of heat can still be measured in calories. It should be noted that 1 kcal is equivalent to 4 J.