Every calculator here shows its arithmetic and says where its rates came from and when they were read. None of them asks for your email and nothing you type is sent anywhere: they run entirely in your browser.
The calculators
CalculatorAppliance Running Cost CalculatorWhat any appliance costs per use, per week and per year, plus eighteen worked out for you at today's rate.CalculatorEnergy Price Cap RatesThe current unit rates and standing charges, what they become on 1 October, and why your own rate is probably different.CalculatorBath or Shower Cost CalculatorWhich is actually cheaper in your house, worked from how you heat the water.
The ones people ask about most
Worked out for you already
The six appliances people most often want costed, at today's cap. Eighteen more are in the running cost calculator.
KettleTypical 3,000 W · 3.9p a boilTumble dryerTypical 2,500 W · 97.9p a cycleWashing machineTypical 2,100 W · 16.4p a cycleDehumidifierTypical 300 W · 62.7p a dayHot tubTypical 2,000 W · £3.13 a dayTelevisionTypical 100 W · 10.4p a hour
At 26.11p per kWh, the Ofgem cap average for 1 July to 30 September 2026. Every page shows the sum and lets you put your own rate in.
Energy figures are worked from the Ofgem price cap on the date shown and from typical power for the appliance class, not from a named model. Your own rate and your own rating plate are the ones that count. Full disclaimer.