How much electricity do household-appliances use?

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It is important to understand how much electricity you use, understanding which appliances contribute the most towards your power bill. This is useful when deciding which appliances to cut back on, approximately 40% of the total energy bill is due to heating and cooling. The unit for appliances is in wattage, where a kwh is how much kilowattage (1000 watts) consumed/produced in an hour.

Calculate Electricity Cost

An important point is also to bear in mind the length of time for which the device will be used. For example an electric blanket may be used for 2 hours, but a hair drier for 5 minutes. Therefore the blanket uses 200W * 2 hours = 0.4kWh. The hair drier uses 2KW * 0.0833hours = 0.1666kWh. So using the blanket costs roughly 2.5 times as much as the hair drier.

All values reported here are estimates, you should check your appliance labels to find out the actual power consumption.


Ways to Save

Around 40% of home energy use is due to heating and cooling, set your heating from 18-20°C in winter and cooling from 25-27°C in summer. For every degree you increase heating and cooling you increase energy use between 5% and 10%. Consider using fans before air conditioning as they cost around 2 cents per hour to run, much less than air conditioning and adds airflow which improves heating effiencency.

Heating water accounts for 25% of household energy use. Install a water-efficient showerhead, allowing you to save on energy bills as less water is needed to be heated. Turn off your hot water storage system, especially when you’re away from home for more than a week.

Appliances accounts for 30% of household energy use. Buying energy-efficient appliances would have reduced running costs, it could potentially having savings that add up to more than initial price difference between non-energy efficient appliances over its life-time. Remember to turn off appliances when not in use as they still use power when left on, even when not in use.

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