Electricity Cost Calculator
Estimate how much it costs to run an appliance.
How to Use the Free Online Electricity Cost Calculator
Find your appliance's wattage (usually on a sticker on the device) and enter it in the 'Appliance Wattage' field.
Estimate how many hours per day you use the appliance.
Enter your electricity rate in dollars per kilowatt-hour (kWh). You can find this on your utility bill.
The calculator will instantly show you the estimated daily, monthly, and yearly cost to run the appliance, completely free and online.
Frequently Asked Questions
What is a kilowatt-hour (kWh)?
A kilowatt-hour (kWh) is a unit of energy equivalent to one kilowatt (1,000 watts) of power expended for one hour. Utility companies bill customers based on the number of kWh they consume.
Is this calculator free to use?
Yes, this online electricity cost calculator is 100% free to use.
Where can I find my cost per kWh?
Your electricity rate is usually printed on your monthly utility bill. It might be listed as 'cost per kWh' or 'supply charge'. If you can't find it, you can search online for the average electricity rate in your state or region.
What this tool is for
The electricity cost calculator estimates running cost from three inputs: appliance wattage, hours of use, and your electricity rate per kilowatt-hour. It is useful for comparing heaters, air conditioners, computers, kitchen appliances, lighting, and other devices before deciding how often to use them. The result is an estimate, because real usage can change with standby power, thermostat cycling, efficiency settings, local tariffs, taxes, and seasonal behavior. For the most accurate input, use the kWh rate printed on your electricity bill.
Common tasks
Estimate how much an appliance costs to run over a day, month, or year.
- Estimate monthly appliance costs.
- Compare two devices before buying.
- Check high-usage equipment.
- Understand how kWh pricing affects bills.
Privacy and limits
The calculator only uses the values you enter and does not need your address or account number.
Maintained by Conversores Online. Last reviewed: May 29, 2026
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