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Electricity Cost Calculator

Calculate how much any appliance or device costs to run. Enter wattage, daily usage hours, and your electricity rate to see hourly, daily, monthly, and annual energy costs.

Used 12.6K times today

How to Use Electricity Cost Calculator

  1. 1

    Enter appliance wattage

    Find the wattage listed on your appliance label, plug, or manual. Common appliances range from 5W (LED bulb) to 4000W (electric dryer).

  2. 2

    Set daily usage hours

    Enter how many hours per day the appliance runs. You can use decimals for appliances that run for shorter periods.

  3. 3

    Input your electricity rate

    Enter your local electricity rate in cents or dollars per kWh, found on your utility bill. The average US rate is about 16 cents per kWh.

Frequently Asked Questions

How is electricity cost calculated?
The formula is: Cost = (Watts × Hours per day × Days) / 1000 × Rate per kWh. Dividing by 1000 converts watts to kilowatts, which is the standard billing unit.
Where do I find my electricity rate?
Your electricity rate is on your monthly utility bill, usually listed as cents per kWh. Rates vary widely by location — the US average is around 16 cents/kWh but can range from 10 to 30+ cents/kWh.
Which household appliances cost the most to run?
The biggest energy consumers are typically electric water heaters, HVAC systems, electric dryers, and refrigerators. Even small differences in efficiency ratings translate to significant annual cost differences.

About Electricity Cost Calculator

The Electricity Cost Calculator on Utilko helps you understand exactly how much each appliance or device costs to operate. By converting wattage and usage time into kilowatt-hours and multiplying by your local rate, you get a precise cost breakdown — hourly, daily, monthly, and annually.

This tool is invaluable for identifying energy hogs in your home, comparing appliances before buying, or simply understanding where your electricity bill comes from. No data is stored and all calculations run instantly in your browser.

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