Home Electricity Usage Calculator
Calculate how much electricity your appliances use and what they cost to run.
Formula
Cost = (Watts × Hours / 1000) × Rate per kWhUnderstanding Energy Usage
Electricity is measured in kilowatt-hours (kWh). One kWh = using 1,000 watts for 1 hour. Your utility company charges per kWh. The national average is about $0.15/kWh but varies widely by state.
Frequently Asked Questions
How do I find an appliance's wattage?
Check the label on the appliance, the manual, or search online. Common: TV 100-200W, fridge 100-400W, AC 1000-3500W, light bulb 10-60W.