How much electricity is it really wasting?, and would it not be better to switch off the 4 lights in the room?
The best way to compare the cost of running different appliances is to look at their power consumption, which is measure of how much power they use in Watts. The following list points out typical values for the wattage of some devices you would find in your home so that you can compare them.
|100W light bulb (Incandescent)||100W||100W||0W|||
|25" colour TV||150W||150W||N/A|
|3" belt sander||1000W||1000W||N/A|
|60W light bulb (Incandescent)||60W||60W||0W|||
|9" disc sander||1200W||1200W||N/A|
|Cordless Drill Charger||70W||150W||N/A|
|Electric Heater Fan||2000W||3000W||N/A|
|Fridge / Freezer||150W||400W||N/A|
|Hair Blow dryer||1800W||2500W||N/A|
|Home Air Conditioner||1000W||4000W||N/A|
|Home Internet Router||5W||15W||N/A|
|Hot Water Immersion Heater||3000W||3000W||N/A|
|Inverter Air conditioner||1300W||1800W||N/A|
|LED Light Bulb||7W||10W||0W|||
|Smart Phone Charger||4W||7W||N/A|
|Submersible Water Pump||400W||400W||N/A|
|TV (19" colour)||40W||100W||1W|||
|Water Filter and Cooler||70W||100W||N/A|||
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 the appliance labels or literature to find out the correct power consumption.
Further Reading and Relevant Articles
Some relevant online articles for further information and reading.
Comments For This Page
The unit is not watt per hour, its watt hour where 1kwh is one unit as mesured by the electricity distribution companies, so it can be used to calculate how much expenditure an appliance will cause.
On 19th October 2017
How much should a land lord charge per point
By snit on 14th October 2017
Will a good quality 1100W inverter supported by two 8D AGM batteries handle the startup and operating draw of the typical American made upright refrigerator having the Energy Star rating?
By A Andrews on 9th October 2017
Hi Pete. This is not a professional opinion, but it seems solar panel inverters do have a 'no load consumption'. This can be up to 30W, so if it is on 24hours per day, this is 720 Wh
In terms of wear and tear or any other adverse effects to switching it on and off ... not sure, perhaps you can ask the manufacturer.
Some models have a sleep mode to switch to a low power mode when there is no load detected.
By Daft Logic on 9th October 2017
I have Solar Panels that use an invertor, This is warm 24/7. Any idea how much it uses at night and is it worth switching it off from dusk to dawn or would this cause wear & tear?
By Pete E on 9th October 2017
Hot Water Immersion Heater has been added.
By Daft Logic on 4th October 2017
Could you add a Hot water emersion heater please
On 4th October 2017
these information is very useful in completing my physics project work given in school on electricity bill.
Thank you !
By prvk on 21st sept 2017
On 21st September 2017
I am using a major telecom DVR that is on constantly 24/7. What is the typical power consumption of such a device? It feeds a 40" LCD television and I am curious as to the hit I take for these. The TV is on probably 12 hours a day.
On 15th September 2017
I tried using a 750watt power inverter to run my fridge when our power went out. Ran for about 10 seconds at 600watts and then would trip the protection in the inverter at over 800watts.
By curious on 13th September 2017
Hot water heater?
On 2nd September 2017
This is helpful, it confirms something I already figured out: this 400 watt desk fan is monstrous, and electronics circa 1950 weren't built for feint of heart.
On 10th August 2017
Hi Foster, without knowing the exact numbers, I would say a newer fan would be more efficient in terms of air blown per Watt used. However a newer fan may also just push more air and use more power overall. So if you prefer a low setting I would say to look in to a new mini desk fan as there is not much point in having a large fan running on a low setting all the time.
By Daft Logic on 8th August 2017
I am using an older model (80's Panasonic F-1609H 16" desk fan) usually on low setting...Would a newer fan be significantly more power friendly?
By Foster on 6th August 2017
It was so helpful for my physics project
By Geo Jolly on 31st July 2017
Many thanks. Quite Helpful.
On 29th July 2017
home theater wattage
On 11th July 2017
Please could u calculate the points of any apliance and add the amount payable.the page is very useful.
By Apology on 12th June 2017
Game Console has been added
By Daft Logic on 30th May 2017
Many thanks -- Good to have
By Yoga on 30th May 2017
This is good. Could you add gaming console to the list?
By Tk on 27th May 2017
The units of Watts are derived from metric base units, therefore a Watt is a metric unit.
By Daft Logic on 26th May 2017
I'm confused. Are these measurements imperial or metric?
On 26th May 2017
Kindly add Geyser in the list
By Rajib Biswas on 15th May 2017
Could you please add a "window unit,air conditioner..."
On 15th May 2017
The definition of the unit watt is joules per second. Watts per hour for example, does not make any sense. That would mean joules per second per hour.
On 9th May 2017
Watts per what? Year? Month? Day? Hour?
On 7th May 2017
Thanks a lot,very informative
By Mawusi on 26th April 2017
Hi, please how much am I supposed to pay as in cash for using a 19 colour tv %uD83D%uDCFA which minimum and maximum consumption are 40W and 100W respectively
By Emmanuel on 11th April 2017
Watts per ??
On 7th April 2017
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