Please use twitter to ask a question   

How much does it cost to boil a kettle?

boil less water in kettle energy saving tips
 Energy Saving:  82 - 164 kWh each year
 Money Saving:   £22.222 -  £44.444 each year
 CO2 Saving:  19.11kg - 38.21kg each year
 Comment:  Boil only what you need. Savings depend on how much tea you drink!
 Energy range that could be saved with this measure.
 Money Savings range you could have employing this measure.
 Carbon Dioxide emission range that could be saved with this measure.

We are often told to only use as much water as we need in a kettle and not to fill it to the top, but what are the potential annual saving in doing this. Well it takes roughly 4.5 minutes to boil a full (2 litre) kettle with a power rating of 3kW (kilowatts).

First how much does it cost to boil a kettle once?
Kettle Energy to boil a kettle Cost to boil a kettle
Full 0.225 KWh £0.061
Half Full 0.113 KWh £0.031
Next, How much does it cost to boil a full and a half full kettle operated twice a day for a full year.
Kettle Annual Energy Use Annual Cost (and CO2 emissions)
Full 164 KWh £44.552
Half Full 82 KWh £22.271

Well There it is, a full year of operating a kettle in this way should save you about £22.271
. Less than you might imagine but if you are a real tea fiend and boil it 4 times a day you would double the saving! Every little counts.

Comments and Questions

Comments are Closed
Cold boil vs warm boil - John Walsh  2023-02-07 12:35:41
OK, most of the energy used in boiling a kettle is used to raise the first few degrees from tap cold to lukewarm. This is one of the physical properties of water. So my question is, for 2 boils is is cheaper to boil half a kettle of cold water twice, or one full kettle of cold water once, followed by a still lukewarm half kettle an hour later?
Comments are Closed
Mr - Rueben Derrick  2017-10-26 21:51:37
So to boil a kellet ONLY costs £0.035.That's 2857 boils to make ONE POUND...Why does the world use boiling a kettle as an example of wasted energy!
reply - rdh  2017-10-27 09:57:31
Thanks for taking the time to comment. But you are 100x out.
£0.035 = 3.5 pence
100 pence to the pound
100 pence / 3.5 pence = 28.57 boils
Comments are Closed