Electricity Cost Calculator
Calculate how much electricity any appliance costs to run. Enter the wattage, daily usage hours, and price per kWh to get daily, monthly, and annual costs.
Energy Calculators
Current for 2026How we verify data: Methodology →
Electricity Usage Calculator
Work out a device electricity consumption in kWh and the estimated cost. Enter the power, running time and price per kWh.
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How we calculate electricity usage
Energy = power [kW] x time [h]. Cost = energy x price per kWh.
Example: fridge 150 W, running 24 h/day
Usage: 0.15 kW x 24 h = 3.6 kWh/day. Monthly: 108 kWh, about 86.40 PLN at 0.80 PLN/kWh.
Frequently asked questions
How is electricity usage calculated?
Energy = power in kW x running time in hours; cost = energy x price per kWh.
Where do I find a device power?
Check the rating label or the manual, where wattage in W is stated.
How do I convert W to kW?
Divide watts by 1000; for example 150 W equals 0.15 kW.
Does standby use electricity?
Yes, many devices draw a small amount in standby, which adds up over time.
Why is my bill higher?
Distribution charges and fixed fees add to the energy cost on your actual bill.
Is the result binding?
No, it is indicative and depends on the figures you enter.
Indicative result. Actual usage depends on the device operating mode.
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Result48kWhLacznie
- kosztLacznie
- 40.8
- kWhDziennie
- 1.6
- kosztMiesieczny
- 40.8