How do u convert kW to MJ?

In this answer, kW is defined as 1000 Watts of power, kWh is 1000 Watt-hours of energy, and MJ is 1 million Joules of energy. Units of power can only be converted to energy if you know the amount of time over which the power is used or generated. 1 Watt for 1 second is equal to 1 Joule, therefore 1 kWh is equal to 1000 Watts for 3600 seconds or 3.6MJ of energy. Multiply units of kWh by 3.6 to obtain MJ.