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Home & garden.

Updated: 1 Jun 2022

Best energy-saving kettles for 2022

Our round-up of the best energy-saving kettles. Buy a recommended model to get a speedy brew and save money on your electricity bills.
Rebecca Jakeman
Energy efficient kettles 439735

Kettles all use a similar amount of energy to boil a litre of water, but that doesn’t mean they’re all equally efficient. 

If a kettle switches off immediately after boiling and has a low minimum fill level, it can help you save energy and money, as this means you don’t have to boil more water than you need.

To be eco-friendly, a kettle must have a brief overboil time and low minimum fill level. That way, we know that they do more to keep electricity use down.

To see all the kettles we recommend, see our pick of the Best kettles for 2022. 

Best Buy energy-saving kettles

Which? members can log in to see our pick of the best energy-saving kettles in the table below. If you're not a member, join Which? to unlock the table below.

  • 81%
    • best buy
    £149.00

    It may be on the expensive side, but this kettle is a great all-rounder. It boils quickly, is very easy to use and filters limescale effectively if you live in a hard water area.

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  • 81%
    • best buy
    £46.00

    This quick and quiet kettle looks stylish and is easy to use. It turns off quickly after boiling and you can do just one cup at a time, making it much more energy efficient than the majority of kettles we test.

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  • 81%
    • best buy
    • eco buy
    £29.00

    Ideal if you only tend to make one cuppa at a time, this kettle can boil 240ml in less than a minute - and it's pretty quick to boil larger amounts of water too. It's also easy to use and keep clean.

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  • 79%
    • best buy
    • eco buy
    £18.00

    It's a cheap and cheerful kettle that doesn't compromise on performance. You can make a speedy drink for one or cater for a larger group hassle-free, plus it's very easy to use.

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  • 79%
    • best buy
    • eco buy
    £89.99

    This modern-looking metallic kettle will have your morning coffee ready in less than one minute. It doesn't boil for any longer than necessary and it's a great choice if you've previously struggled with limescale build-up.

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How much does it cost to boil a kettle?

According to the UK Tea & Infusions Association, Brits drink approximately 100 million cups of tea a day - that's an awful lot of kettles going on to boil for a morning cuppa. But just how much are you racking up on your energy bill every time you flick the switch?

The correct equation to work out the answer is power (kilowatt) x cost of one kWh (pence) x the length of time. From 1 April 2022, the average customer paying by direct debit will pay 28p per kWh for electricity and 7p per kWh for gas - owing to the price cap.

Most kettles have a wattage of around 3kW, meaning that it takes approximately 0.113kWh to boil a litre of water. Therefore simply take 0.113 x £0.28/kWh (provided your house uses electricity rather than gas) and you get a cost of 3p per boil.

Say you boil the kettle three times a day every day, that works out as 63p per week, £2.70 per month or just over £32 over a year. Obviously that amount will be a lot lower if you boil only enough water for one cup of tea (usually around 250ml), so if you're the only hot drink lover at home make sure you choose a kettle with a low minimum fill.

Do fast kettles use more energy?

It's a common misconception that if a kettle boils faster, it must use more energy. However, we've found that isn't the case.

In fact, most of our Eco Buys have been awarded that title because of their speedy boiling. If a kettle is able to reach the boil in around three minutes, it will use far less energy than one that takes four or five minutes.

Therefore, if you're looking to cut down your energy bills you're better off choosing a fast kettle as it'll likely save you money in the long run.

You can use our filters to only see reviews of kettles that score at least four out of five stars for speed in our tests.

How to save money when using your kettle

  • Boil only the amount of water you need - boiling a litre of water often uses more than twice the energy it takes to boil the minimum amount.
  • Descale your kettle regularly - if it’s full of limescale, it uses more energy to boil the same amount of water.
  • Choose a kettle with a low minimum fill - this means you won’t waste energy by boiling more water than you need.

If you just want the best cheap kettle, or are looking for a kettle with special features such as a filter or multiple temperature options, head to our kettle reviews to see all the kettles we've tested.