Electricity Cost Calculator
Estimate appliance energy use in kWh and cost using your own electricity rate.
From power to energy
Power in watts is divided by 1,000 to obtain kilowatts. Energy use depends on daily hours and number of days.
kWh = power in kW × hours per day × days
Cost with your own rate
Enter the actual price per kWh from your bill. The estimate excludes fixed charges, tiers, taxes, and rate changes; the monthly figure assumes 30 equal days.
Frequently asked questions
Is a watt the same as a watt-hour?
A watt measures power; kWh measures energy used over time.
Is an electricity rate supplied?
No. You enter your own price per kWh.
What about appliances with variable power?
The result is an approximation based on the average power and hours you enter.
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