With this online calculator you can convert tons to Gcal (metric tons to gigacalories) of heated water.
Formula:
Q = M * (T2 - T1) / 1000
Q - thermal energy, Gcal
M - mass of heated water, tons
T1 - initial temperature, °С
T2 - final temperature, °С
Note: 1 gigacalorie corresponds to the heating of 1000 tons 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.