How much electricity can we produce with 1 ton of water?

1 ton = 1,000 kg, the potential energy of each ton of water per meter is: 1,000 kg*9.8 m/S2=9,800 N (Newton)

Calculated in based on a water level 100 m high, the work that can be done with each ton of water is: W=9800N*100m=980000J (Joule)

And one kilowatt hour ( 1kW.h) is equal to 3600000J (3.6MJ), so the hydroelectricity production capacity per ton is:

980000/ 3600000=0.27 kWh

If the water level is less than 100 meters, the value will be reduced proportionally. If we consider that the conversion efficiency of the generator is around 50%, its value will be even lower