Appliance energy-use calculator

Estimate kilowatt-hours and cost from watts, hours, and your price.

How it works

The default price is an example. Type the energy rate from your bill before you compare devices.

Cost equals watts divided by 1,000, times hours per day, times days, times dollars per kWh.

Nameplate watts are not always average use. The figure is an estimate, not a savings promise or a utility quote.

Inputs stay in your browser. This site does not save calculator entries in its database.