UK electricity cost calculator
Calculate running costs of home appliances in the UK per hour, day, month and year using the Ofgem electricity price cap.
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Based on the standard Great Britain energy price cap unit rate set by Ofgem. Standing charges are excluded because they apply regardless of appliance usage.
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About this tool
Calculate how much electricity household appliances cost to run in Great Britain. Enter the wattage of any appliance (or click quick presets for air fryers, electric fan heaters, kettles, tumble dryers, or EV chargers) and your unit rate in pence per kilowatt-hour (kWh) based on the Ofgem price cap.
How to use it
- 1 Pick a household appliance preset or type the wattage in Watts.
- 2 Adjust your electricity tariff rate in pence per kWh (pre-filled with the current Ofgem price cap).
- 3 Specify the hours or minutes used per day to see running costs per hour, day, week, month, and year.
Questions
How do I calculate appliance running cost?
Divide appliance wattage by 1,000 to get kilowatts (kW), multiply by hours of use, and multiply by your electricity unit rate in pence per kWh.
What is the UK Ofgem electricity price cap rate?
The standard domestic electricity price cap for Great Britain typically hovers between 24p and 29p per kWh for direct debit customers.
How much does an electric fan heater cost to run per hour?
A 2,000W (2 kW) portable fan heater running at full power uses 2 kWh of electricity per hour, costing approximately 49p to 58p per hour in the UK.
Is my data uploaded?
No. This tool runs in your browser, so your text and files never reach our server.
Is this tool free?
Yes. It’s free to use with no sign-up and no limits for normal use.
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