UK appliance running cost calculator
Enter any appliance's wattage and usage to see the cost per hour, day, week, month and year at today's electricity price.
Price updated 9 July 2026 · Q3 2026 (Jul–Sep)
About £4.25 a month · £51.05 a year
Uses about 196 kWh a year. Prefilled with the Ofgem cap of 26.11p/kWh — edit any box for your own figures.
Tip: pick an appliance to prefill its typical power, then adjust the hours and days to match how you actually use it.
The formula, in plain English
Energy (kWh) = watts × hours ÷ 1000. Cost = kWh × price per kWh. That's the whole thing — no hidden model. Read more about how we calculate.
Or start from an appliance
Common questions
How do I work out what an appliance costs to run?
Multiply its power in watts by the hours you use it, divide by 1,000 to get kWh, then multiply by your electricity price per kWh. This calculator does it for you and lets you try any usage pattern.
What electricity price should I use?
We prefill the Ofgem price cap unit rate of 26.11p per kWh. If you know your own rate — on your bill as “unit rate” — type it in for an exact figure.
Where do the appliance wattages come from?
They are typical published values from public sources such as the Energy Saving Trust and manufacturer specifications, shown as a range because real models vary. See our data and sources page.