Skip Discover Education Main Navigation
Skip Discover Education Main Navigation

Visit Cosmeo for explanations and help with your homework problems!

Calculate the Costs to Use Electricity

Look around you. What electrical device is on? Do you know much it ’ s costing you? This page will help you to find out.
Examine each device that ’ s turned on around you and type its power (in Watts) into this box. (If you want to include more than one device, just separate each device ’ s power intake with a comma.)

Example, your TV is on. Type: 115
Example, your laser printer and toaster are on. Type: 580,1200

How long has each device been on for?

How much does it cost per kilowatt-hour (kWh)?
($0.05 per kiloWatt-hour is a "ball park" cost for electricity in the United States)
Quick! I need help with: