Electricity Cost Calculator
Enter an appliance's power, daily use, your price per kWh and a number of days to see the energy and cost.
How to use it
- Enter the appliance's power In watts (check the label or specs).
- Enter usage and your rate Hours per day and your price per kWh.
- Read the cost See the energy used and the cost over the days you choose.
Examples
| 1000 W, 5 h/day, 30 days | 150 kWh |
|---|---|
| At $0.15 / kWh | $22.50 |
About this tool
Knowing what an appliance costs to run helps you budget and spot the energy hogs. This calculator works it out from the device’s wattage, how long you use it, and your electricity price.
Enter the power in watts, the hours of use per day, your price per kilowatt-hour and a number of days, and it shows the energy used and the cost. It is great for comparing appliances or estimating a bill. Everything runs in your browser.
Frequently asked questions
How is the cost calculated?
Energy in kilowatt-hours is the power in kilowatts times the hours of use. The cost is that energy multiplied by your price per kWh.
Where do I find an appliance's wattage?
It's usually printed on the device or its label, or in the manual. If only amps and volts are given, watts = volts × amps.
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Updated June 12, 2026