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Independent home energy reference

Clear electricity-cost math for everyday homes

WattBasis helps homeowners and renters understand what their appliances cost to run. We turn wattage, running time, and local electricity rates into simple, transparent estimates you can check for yourself.

Core operating principles

Our editorial standards

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Independent, reader-first guidance

Transparent calculations

Real-world estimates

WattBasis creates its estimates independently. Appliance manufacturers, retailers, and utility providers do not pay us to alter our calculations or conclusions. Advertising, when present, is kept separate from our editorial work.

Our calculators show the inputs and formulas used to produce each estimate. You can adjust wattage, usage time, energy consumption, and your local electricity rate without registering or providing an email address.

We use appliance wattage, annual energy consumption, operating cycles, and local electricity rates where appropriate. Actual costs may vary according to the appliance, household habits, climate, maintenance, and utility pricing.

Our methodology

Every estimate starts with measurable inputs—energy use, operating time, and your electricity rate—then explains the assumptions so you can adapt the result to your home.

WattBasis Editorial Standard

Who creates our content

WattBasis is maintained by the WattBasis Editorial Team. We research appliance energy use, review formulas and worked examples, and update our guides when information changes. Our goal is to make household electricity costs easier to understand—not to replace a utility bill, manufacturer specification, or professional energy assessment. Questions or corrections can be sent through our Contact page.

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Calculate appliance cost

Run your appliance math

Apply your current electricity rate in dollars per kilowatt-hour to generate precise monthly cost estimates for window air conditioners, space heaters, and dehumidifiers.