Did you know that one kilowatt-hour can vacuum for approximately one hour at medium speed (1,000-watt vacuum cleaner), drive an electric car for approximately 6.7 kilometers (with an average energy consumption of 15 kWh per 100 km), or light an energy-saving bulb for up to 90 hours? But, exactly, what do we mean by this energy unit?
A kilowatt hour (kWh) is the amount of energy consumed or emitted in one hour by a 1,000-watt electrical item (e.g., a machine, a person, or a light bulb). This unit of measurement is used to bill both electricity and heat costs.
How is a kilowatt hour calculated?
Power (watts) x time (hours) = power consumption in watt-hours (Wh), this divided by 1000 = consumption in kWh (kilowatt-hours)
Example:
How much does a 60 watt light bulb that burns for six hours consume?
60 watt light bulb x 6 hours of operation = 360 Wh : 1000 = 0.360 kWh
In my house hold the laptop is the device which use the most kwh. My parents and my sister use it and I use it too, but i use also my playstation 4, which use also kwh.