A 1,500 W heater used for 2 hours a day over 30 days consumes 90 kWh. At €0.22/kWh, the energy portion costs about €19.80 per month.
Power in watts describes the rate at which an appliance uses energy. Divide watts by 1,000 and multiply by hours to obtain kWh. A thermostat, standby mode or variable-speed motor means actual consumption may differ from rated power.
The calculator estimates the energy component using your price per kWh. Network charges, contracted power, taxes and time-of-use tariffs may also appear on the final bill.
Compare high-power appliances used for long periods first. Heating, water heating, tumble drying and cooling often provide larger savings opportunities than small electronics.
The calculator applies the rules described on this page to the values you enter and displays the result immediately.
Convert appliance watts and daily use into kWh, daily cost, monthly cost and annual cost using your electricity price.
Enter the requested values and select Calculate now. The result and its main details appear immediately.
Yes. It is free to use and does not require registration.
Yes. It works on phones, tablets and computers.
It follows the stated calculation rules, but real situations may include additional factors.
Calculator input is processed in your browser and is not sent to our servers.