Calculators

Electricity Cost Calculator

Work out how much it costs to run an appliance. Enter its wattage, hours of use and your electricity price per kWh.

W
£
Find this on your energy bill — e.g. 0.25 for 25p per kWh.

Enter your values and press Calculate.

How to use the Electricity Cost calculator

The wattage is usually printed on a label on the back or bottom of the appliance. Devices with thermostats (fridges, heaters) cycle on and off, so their real usage is often lower than the label suggests.

Formula

kWh = Watts ÷ 1000 × hours; Cost = kWh × price per kWh.

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