Electricity rates vary significantly across the US, and even within the same state, so a national average tells you very little about your actual bill. Our electricity cost calculator combines an appliance or device’s wattage, your usage hours, and your local rate per kilowatt-hour to estimate exactly what it costs to run — daily, monthly, or over a full year.
This calculation is most useful for the appliances that run constantly or draw heavy power: air conditioners, electric water heaters, and older appliances that haven’t been updated in years. Comparing the running cost of an old appliance against a newer, more efficient model can make the case for an upgrade a lot clearer than the sticker price alone.
If you’re not sure what wattage to enter, our appliance wattage calculator provides typical wattage ranges for common household devices, giving you a realistic starting point before you calculate the cost