Electricity Cost Calculator (Power and Hours)
Free electricity cost calculator. All prices are editable estimates, your local rates may differ.
Enter your values
$
The Monthly cost is the estimated amount the appliance adds to your monthly electricity bill, while the Electricity used per day and Cost per day rows break that total down into daily use and daily cost.
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.
Related calculators
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.