With this online calculator you can convert m3 to Gcal (cubic meters to gigacalories) of heated water.
Formula:
Q = V * (T2 - T1) / 1000
Q - thermal energy, Gcal
V - volume of heated water, m3
T1 - initial temperature, °С
T2 - final temperature, °С
Note: 1 gigacalorie corresponds to the heating of 1000 cubic meters of water per 1 degree Celsius.
Heat is a form of energy that can be transferred from one object to another or even created at the expense of the loss of other forms of energy.