Some home appliances may seem to use a lot of energy such as electric ovens, dishwashers or washing machines but it’s the humble kettle that uses the most.

On average the kettle uses about 6% of all the electricity supplied to British homes. While an electric oven doesn’t always get used every day, a kettle is used daily to make your essential cups of tea, coffee and other hot drinks.

Here are some approximate power ratings for different domestic appliances. A kettle typically has a high rating but can be used 5 to 10 times a day for two to three minutes each time.

Appliance Rating Appliance Rating
 Immersion heater  3000W  Fridge  40-120W
 Electric fire  2000-3000W  Fridge-freezer  200-400W
 Oil-filled radiator  1500-2500W  Freezer  150W
 Electric shower  7000-10,500W  Electric mower  500-1500W
 Dishwasher  1050-1500W  Electric drill  900-1000W
 Washing machine  1200-3000W  Hairdryer  1000W
 Tumble dryer  2000-3000W  Heating blanket  130-200W
 Iron  1000-1800W  Plasma TV  280-450W
 Vacuum cleaner  500-1200W  LCD TV  125-200W
 Towel rail  250W  Video, DVD or CD  20-60W
 Deep fryer  1200W  TV box  30-40W
 Toaster  800-1500W  Games console  45-190W
 Kettle  2200-3000W  Laptop  20-50W
 Microwave  600-1500W  Desktop computer  80-150W
 Oven  2000-2200W  Tablet (charge)  10W
 Grill/hob  1000-2000W  Broadband router  7-10W
 Dehumidifier  300-700W  Smart phone (charge)  2.5-5W
 Extractor fan  5-36W

Ideally an energy efficient kettle should have a good power rating and insulated walls so it doesn’t lose too much energy while heating water. However this is not the biggest opportunity for saving energy.Duronic eco kettle

Tom Baxter, visiting professor of chemical engineering at Strathclyde University has suggested that a very simple and free action we can all take to cut electricity usage is to fill a kettle with only the amount of water needed – saving £19 from a £600 average annual electricity bill.

There’s no extra kit to buy here, just a small change in behaviour leading to good habits.

While we sell very efficient kettles with temperature controls – see our eco-kettles – only replace your current kettle when it has stopped working. Keep it well maintained by descaling it when necessary.

When you are using your kettle don’t overfill it and use exactly the amount of water you need for your drinks. If you use anymore then you are wasting money and adding Carbon to the atmosphere unnecessarily.

A single mug has a capacity of about 350 ml which is less than the supposed commonly ‘minimum’ of 0.5 l or 500 ml on many kettles. Get into the habit of using a little less than the minimum 0.5 l for a single mug and you will save on bills and carbon emissions.

Check out this electricity costs calculator to work out your costs for each domestic appliance: electricity costs calculator

Further reading

How much electricity am I using?

Energy bills: are your cuppas costing more than you thought?

Eco kettles saving money and cutting bills