Heat is the energy transferred due to differences in temperature, and also the energy produced by a 1 degree c rise in temperature of 1 metric gram of water at 1 atmosphere. Between objects of different temperatures, heat is always transferred from the hotter object to the cooler one.

If you want to calculate how many calories you consume per day, you can download the software. Then consume calories. A calorie is a physical unit of energy that is widely used in nutritional measurements and fitness manuals. The term is phonetically derived from the English word calorie, which is defined as the number of calories required to raise 1 gram of water by 1 degree Celsius at 1 atmosphere of pressure.