What is a Kilowatt-Hour kWh? Plus Examples


To explain what a kilo-watt hour is or kWh for short, it is basically a way to measure power energy using 1000 watts of energy during a 1 hour period. It is simply a way to measure power or measure the amount of power needed to operate a particular appliance.

It is used by both gas and electricity suppliers and depending on the time of the year, an average house can use between 300 kWh to 400 kWh per month.

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Examples of 1 kWh

The usage of 1000 watts of energy over 1 hour is the same as 1 kilowatt and it guides you on the level of energy being used and consumed. For example a 1000 watt appliance (1kWh) turned on for 1 hour or a 100 watt bulb turned on for 10 hours will both consume 1 kilowatt hour of energy.

As a rough guide, watching TV for 6 hours can consume 1 kWh or a single cycle of your washing machine or dishwasher can consume 1 kWh. Likewise, 10 to 12 minutes in an electric shower and 30 minutes of your Tumble dryer can also use 1 kWh of energy.

With the cost of power and electricity getting higher and higher, it is extremely important that you understand which appliances are using the highest amount of energy in your home and that you can implement new strategies and tips to reduce the level of kWh’s being used each day.

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As a guide, your fridge freezer refrigerator can use 100 kWh to 115 kwh each month which is quite good when you compare it to other appliances in your home. For example, using the hair dryer frequently can add up to 100 kWh to 120 kWh per month and using the clothes iron for extended periods of time each week can add up to 100 kWh to 120 kWh per month also.

Likewise the dishwasher when used often can add up to 130 kWh to 150 kWh per month and even vacuum cleaners can add up to 80 kWh to 100 kWh each and every month as they use 3 types of energy namely heat energy, kinetic energy plus electrical energy

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