1 kW is equal to:

Concept: Watt is a power unit denoted by the letter W. It is defined in the International System of Units (SI) as 1 Joule energy used per second and is used to quantify the rate of energy transfer with respect to time.

We know that, 1 Watt = 1 Joule per second ()

Kilowatt-hour is a unit of energy with the abbreviation KWh.

The following is the definition of 1 KWh:

1 KWh is the amount of energy consumed by an electric appliance with a power of one kilowatt, or 1000 watts, over the course of one hour. So, if a 1000W appliance runs for an hour, we say it has consumed 1 KWh of energy.

Let's convert 1 KWh to another SI unit of energy, Joules.

Watt is a unit of power, and hour is a unit of time.

Hence, 1 kilo Watt = 1000 Joule per second