The electricity usage tool is to guide you as to how much electricity you are using in your house for different purposes. The default data is for a typical household - your usage and your appliances will be different. You can edit the rows to suit you: for example you might have a fridge-freezer instead of a fridge and you might have an electric shower or an extra freezer. You may find sufficient information in the manuals that come with your equipment but I strongly recommend you measure as much as you can with an electricity monitoring plug (like this one but there are lots of others). You could buy one to share with your friends.
This page explains how I chose the default figures and how typical appliances may vary.
Most of the information here is derived from a survey of 251 households for Department of Energy and Climate Change - The household electricity usage survey and some from Youreko UK a useful website for 'Product Energy Savings and Energy Cost Comparison'.
The average households electricity usage in the DECC survey was about 9.9 kWh/day (without electric heating), but some used as little as 3 kWh/day and some up to 20 kWh/day or more. You can check your usage on your bill or take some meter readings. It is difficult to track down every little bit of electricity you use but you should be able to find most of it.
The units on your electricity bill are kWh (kilo-watt-hours). One kWh is the energy used by something which runs at 1000 W for 1 hours. For example my vacuum cleaner uses 1000 W so if I ran it for 1 hour it would use 1 kWh. Your TV system might use 100 W so 1 kWh would be 10 hours of TV. For something which is on all the time, 40 watts for one day would be almost 1 kWh.
Using the tool you can say how much energy something uses in different ways:
|Freezer|| Upright 327|
|An A++ chest freezer could uses as little as 180 kWh/year.|
|Fridge||162|| A rated Under-counter fridge 116 - 285 kWh/year but there are A+ and A++ availble|
A rated Tall fridge 131 - 311 kWh/year (but there are lots of A+ appliances available)
|Fridge-Freezer||427|| A rated 206 - 490 kWh/year|
A+++ rated tall fridge/freezer 149 - 159 kWh/year
|Washing machine||0.5||0.2 - 1.0||Average use is 5.5 cycles/week|
|Tumble dryer||1.2||0.5 - 3.0||Average use is 4.8 cycles/week|
|Dishwasher||1.2||1.0 - 1.5||Average use is 5.0 cycles/week|
|Shower||0.8||for a 38C shower at 6 l/sec|
|Kettle||167||Energy per use mainly 0.050 - 0.120 kWh. Boiling one pint of water takes 0.06 kWh or so depending on the kettle. For each additional half pint, add 0.025 kWh.|
|Hob||226||Range 80 - 500 (only 10 households measured).|
|Oven||290||Range 100 - 500.|
|Microwave||167||Range 80 - 300.|
|Breadmaker||23.6||Which magazine reports 0.34 kWh/run.|
|Toaster||21.9||I measured mine at 0.09 kWh/use|
|Steamer||52.7||Only 2 households measured.|
|Clock Radio||2.3||Digital radios use up to 20W when on but analogue radios use very little extra power.|
|TV system in use||
CRT TV 57 |
LCD TV 97
Plasma TV 245
Set top box 20
Speaker system 9
|Typical TV power usage depends greatly on size and brightness as well as technology. The whole system will normally include at least a set top box as well. While your TV is on your DVD player may be in standby. You may wish to account separately for TV + DVD or TV + games console versus TV alone.|
|TV system on standby||
CRT TV 2 |
LCD TV 2
Plasma TV 0.5
Set top box 10
Speaker system 3
Some people will switch off the TV when it is not in use and others leave it, or some other parts of the system, on standby. It is best if you measure the overall standby power consumption with a plug.
External hard drive 32
|Desktop + monitor + router + printer (standby) = 110W|
External hard drive 2
|Desktop + monitor + router + printer = 18|
|Lighting||537 kWh/year||100 - 1500 kWh/year||
Even some households with compact fluorescents in at least half their light fittings used more than the average 500kWh/year and there were households with less than 10% of CFLs using less than 250 kWh/year.
To estimate yours - work our which lights you usually have on in the evenings and assume an average of 4 hours per day (longer in the winter but less time in summer). So, 200W x 4 x 365/1000 = 290kWh/year.
|Burglar Alarm||72 kWh/year||20 - 150 kWh/year||Only 9 examples|
|Central Heating Pump||135 kWh/year||Only 2 appliances monitored||Your central heating may be gravity fed or use a pump. Only pumped systems use power.|
|Hair Dryer||19.6 kWh/year||5 - 70 kWh/year||20 kWh/year, could be 5 minutes/day at 650W|
|Telephone (cordless)||25.3 kWh/year||only 3 appliances monitored||Equivalent to 2.9W
On-mode 11.2 W|
Standby 2 W
|Vacuum Cleaner||18 kWh/year||0 - 100 kWh/year||18 kWh could be 20 mins/week at 1 kW|
|Iron||31.2 kWh/year||5 - 80 kWh/year||31.2 kWh could be 400 W for 30 minutes 3 times a week|
You can load your data from the tool into a spreadsheet and make your own charts: