Electricity cost calculator

Estimate appliance energy use and electricity cost.

Formula verified

Power wattsHours used hElectricity rate $/kWh

Estimated electricity cost

$1Energy used: 5 kWhCalculated locally in your browser. Confirm assumptions that apply in your location.

How this calculator works

Energy in kWh = watts × hours ÷ 1,000. Cost = kWh × electricity rate.

Results are estimates based on the values entered. Confirm rates, prices, units and professional requirements that apply in your location.