How much does a iron cost to run?

Updated 7 November 2026 · ClearCost UK · 3 min read

A iron uses about 1,200W. At 27p per kWh, running it about 18 minutes a day costs about £0.324 an hour, £2.96 a month and £35 a year. One use of 18 minutes costs about £0.097.
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Iron running cost at different electricity prices

The figures use 1,200 watts and about 18 minutes a day. Your own price per kWh is on your electricity bill, so pick the row closest to it, or change the numbers in the calculator.

Cost = watts ÷ 1,000 × hours × price per kWh. For a 1,200W iron, one hour uses 1.2 kWh.

Iron: 1,200W, about 18 minutes a day

Electricity pricePer hourPer dayPer monthPer year
20p per kWh£0.240£0.07£2.19£26
25p per kWh£0.300£0.09£2.74£33
30p per kWh£0.360£0.11£3.29£39
35p per kWh£0.420£0.13£3.84£46

Typical wattage. Check the label on your own appliance.

Iron running cost by hours of use

How long you use it matters more than almost anything else. The table shows the cost of using a 1,200W iron for different amounts of time each day at 27p per kWh.

Iron at 27p per kWh

Hours per dayCost per dayCost per monthCost per year
30 minutes£0.162£4.93£59
1 hour£0.324£9.86£118
2 hours£0.648£19.72£237
4 hours£1.30£39.45£473
8 hours£2.59£78.89£946
24 hours£7.78£236.68£2,838
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How much power does a iron use?

A typical iron is rated around 1,200W, which is 1.2 kW. Over a year of the use above that adds up to about 131 kWh. The element switches on and off with the thermostat while you iron.

Wattage varies between models. Look for the power rating on the label, in the manual or on the maker's website, and enter it in the calculator for an exact answer.

How it compares with other appliances

Typical wattage and typical use for each appliance, at the same electricity price. A high cost per hour does not always mean a high yearly cost, because it depends on how often you use it.

Compared at 27p per kWh

ApplianceTypical powerCost per hourCost per year
Iron (this page)1,200W£0.324£35
Vacuum cleaner1,000W£0.270£30
Hair dryer2,000W£0.540£39
LED light bulb9W£0.002£4
Old incandescent light bulb60W£0.016£30
Electric blanket100W£0.027£59
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Ways to cut the cost of running a iron

  • Use it less at peak times if you are on a time-of-use tariff, and more when power is cheapest.
  • Choose a model with a high energy rating when you replace it. The saving over its life is often bigger than the price difference.
  • Switch it off at the wall when it is not in use if it has a standby draw.
  • Check your tariff. A lower unit rate cuts the cost of every appliance in the house.

Sources and further reading

Questions people ask

How much does it cost to run a iron?
About £0.324 an hour, £2.96 a month or £35 a year at 27p per kWh, using it about 18 minutes a day.
How much does a iron cost to run for 24 hours?
Running a 1,200W iron for 24 hours straight would use 28.8 kWh and cost about £7.78 at 27p per kWh.
How many watts does a iron use?
A typical iron uses about 1,200 watts. The exact figure is on the label or in the manual.
What electricity price should I use?
The Ofgem price cap sets the maximum unit rate for most standard variable tariffs and changes every three months. Use the p/kWh figure on your own bill.

Results are estimates for information only, not financial advice. Read the full disclaimer.

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