Electricity Cost Calculator
Find out what any appliance actually costs to run. Enter the device power in watts, how many hours a day you use it, and the price you pay per kilowatt-hour, and the calculator converts that into the energy used and the cost per hour, per day, per month and per year. This makes it easy to spot the quiet money-drains in a home, compare an old appliance against an efficient replacement, or check whether leaving something on standby is worth worrying about. Because you enter your own electricity price, it stays accurate for any tariff or country and needs no live data lookup. Multiply up across several devices to sanity-check a bill. All calculations run locally in your browser and nothing you enter is stored or sent.
How to use Electricity Cost Calculator
- Enter the appliance wattage.
- Enter hours of use per day.
- Enter your price per kWh.
- Read the cost per hour, day, month and year.
Frequently asked questions
How is running cost calculated?
It multiplies the appliance wattage by hours of use to get kilowatt-hours, then multiplies by your price per kWh.
What time periods does it show?
It shows the cost per hour, day, month and year so you can see both the small and the cumulative expense.
Where do I find the wattage?
Check the appliance label or spec sheet for its power rating in watts, then enter it here.
What is Electricity Cost Calculator?
Find out what any appliance actually costs to run. Enter the device power in watts, how many hours a day you use it, and the price you pay per kilowatt-hour, and the calculator converts that into the energy used and the cost per hour, per day, per month and per year.
Is Electricity Cost Calculator free to use?
Yes. Electricity Cost Calculator is completely free, with no sign-up and no usage limits.
Does Electricity Cost Calculator work in a web browser?
Yes. Electricity Cost Calculator runs in any modern web browser. There is nothing to download or install.
Is my data private with Electricity Cost Calculator?
Yes. Electricity Cost Calculator runs entirely on your device in your browser, so nothing you enter is uploaded to a server.
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