Appliance Running Cost
Calculate the electricity cost of running an appliance per day, month and year from its wattage and hours of use, free online.
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Energy (kWh) = watts × hours ÷ 1000. Cost = kWh × price per kWh. Add the standby power for the hours the appliance is plugged in but idle. Check the appliance label for watts, or use a plug-in energy meter.