You enter the appliance wattage, daily usage hours, and your electricity rate per kWh. The tool converts watts to kilowatts, multiplies by hours to get daily kWh, then scales to monthly (×30) and annual (×365) totals. Cost is simply kWh multiplied by your rate. It assumes constant wattage — appliances with variable loads (like refrigerators that cycle on and off) may use less than the nameplate wattage suggests.
Check the label on the back or bottom of the appliance, the owner's manual, or the manufacturer's website. If only amps are listed, multiply amps by your voltage (typically 120V in the U.S.) to get approximate watts.
Look at your most recent utility bill for the per-kWh rate. In the U.S., the average is roughly $0.16/kWh, but your rate may differ based on location, plan, and time-of-use pricing. Use your actual rate for the most accurate estimate.
This calculator covers a single appliance. Your total bill includes all devices, plus fixed charges, delivery fees, and taxes. Also, some appliances draw standby (phantom) power even when turned off.
Energy Star appliances typically use 10–50% less energy than standard models, depending on the category. Run both wattages through this calculator to compare annual costs and estimate payback time.
Estimate only. Results reflect your inputs and standard formulas. Double-check important decisions independently.