Martin Lewis reveals a simple way to calculate the running costs of any household appliance

MARTIN Lewis has revealed how to calculate the cost of running appliances – we explain prices for ovens, washing machines and more.

Millions of households have been affected energy bill increases after the government rolled out the energy price guarantee.

Martin Lewis has revealed a simple sum to calculate the cost of running your appliances


Martin Lewis has revealed a simple sum to calculate the cost of running your appliancesCredit: Rex

This means that the energy bills have been frozen at DKK 2,500 for the average household over two years – up from £1,971.

Many will now wonder how much it costs to run ordinary household appliances under the new cap.

Martin has revealed a simple way to calculate the running costs of toasters, microwave ovens and more.

The money saving expert added Twitter to explain how bill payers can crunch the numbers themselves.

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Martin said to first find your appliance’s wattage – this is how much energy it needs to run.

You must then bear in mind that 1,000 watts is worth one kilowatt (kW).

You pay approximately 34p per kW per hour – which is abbreviated to kWh.

Martin gave an example in his tweet.

“So 100W (one tenth of a kW) appliance on for two hours is 3.4p an hour x 2 = 6.8p,” he said.

How much do your common household appliances cost to run

Using Martin’s calculation, The Sun has crunched the numbers on how much that is costs of running a range of common household appliances.

It’s important to note that Martin said the amount was a “rule of thumb” to give people a rough idea of ​​operating costs.

This means that it does not provide exact operating costs, more an indication.

But it is still a good calculation to use to get an idea of ​​the costs – and how you should regulate your consumption.


Microwaves in the average home generally have a wattage of between 700 and 1,200 watts.

A 700 watt model would use 0.7 kilowatts per hour (kWh) and a 1,200 model, 1.2 kWh.

This means the 700 watt model will cost 23.8p an hour to run.

While a model using 1,200 watts will cost you 40.8p an hour.

Using your microwave for an hour a week will set you back £21.22 a year.


Use your oven with an average power of 2,100 watts to cook your food will add soon.

It will cost you 71.4p an hour to run.

If you use your oven for one hour a day, it will cost you £260.61 over the year.

Washing machine

According to the Center for Sustainable Energy average washing machine uses 2,100 watts of energy.

This means it will also cost you 71.4p an hour to run.

If you use your washing machine for two hours a week, it will cost you £74.26 a year.

Larger families are likely to see this number increase as they have more laundry to get through.


If you’re a fan of toast in the morning, you’ll want to know how much it’s costing you on your energy bills.

According to the Center for Sustainable Energy, toasters use about 1,000 watts of power.

This means it costs 34p to run a bowl for an hour.

It takes around four minutes to toast bread – which equates to 1.36p.

This means that if you use your toaster every day, it will cost you £4.96 over the year.

How else can you monitor your energy consumption?

If you’re not good with numbers or don’t want to do the math yourself, there are other ways to see how much your appliances cost to run.

Investment in a smart plug will display this price – they cost around £12 – and a screen on the plug will show how much power the item is using.

Each plug is different, but it measures the energy consumption of the individual device you have connected.

With some, you can enter the price you pay for energy and the gadget will calculate the price for you.

The price per unit you pay depends on the tariff you’re on, but you can usually find this information on your latest energy bill or online account.

Smart meters can also help you track the cost of energy.

These are different from the energy consumption plugs as they show how much gas or electricity you are using in real time for the whole home.

Most energy suppliers give these out for free, but some have been plagued by technical problems.

You can also get smart plugs that let you remotely control some devices, such as lamps.

One homeowner installed smart thermostats on his radiator to control the heating in every room, helping him save hundreds of pounds on his bills.

How to get help with the energy bill

There are plenty of energy grants and schemes open to help you if you’re struggling.

British Gas has recently confirmed that it will pay its most vulnerable customers grant worth £750 to help with sky-high bills.

Ask your supplier what is on offer and how to apply, or check here:

There is also a one-time fuel voucher from your energy supplier if you are on a prepaid meter.

If you are in debt, there are lots of services you can take advantage of and they offer free and friendly advice on how to deal with debt.

Most of them can offer you free guidance and help in person, over the phone or online.

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