Appliance Energy Calculator

This tool sums up multiple appliances at once, so you can see which ones make up the biggest share of your total electricity bill, not just check one device in isolation.

Electric water heaters, HVAC (central AC/heating), and electric dryers are typically the biggest electricity users in a home — often far more than lighting or electronics.

Focus on the appliance with the largest share first: for AC/heating, adjust the thermostat by 1-2°F; for water heaters, lower the setpoint and insulate pipes; for dryers, use cold-water washing and full loads.

Nameplate (rated) wattage is a reasonable estimate, but a plug-in energy monitor gives a much more accurate reading for appliances that cycle on and off, like refrigerators and AC units.