Electricity Cost Calculator (Power and Hours)
Free electricity cost calculator. All prices are editable estimates, your local rates may differ.
Enter your values
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How to calculate
Formula: kWh = watts ÷ 1,000 × hours. Cost = kWh × rate.
Worked example: 1,000 watts, 5 hours per day, 30 days, rate $0.17 per kWh. Monthly use = 150 kWh, monthly cost = $25.50.
Tips
Use the watts from the appliance label and your bill rate for the best result.
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Frequently asked questions
Are the prices accurate?
Prices are editable estimates. The defaults are typical US figures, and your local price can be higher or lower.