How can I measure how much energy my home is using?

The common unit for home energy use in the U.S. is kilowatt-hour (kWh), or British thermal unit (BTU).

Home energy use depends on many factors such as the number of occupants, home appliances and electronics,  occupancy hours, the physical building property (roof, wall, windows, basement materials), heating and cooling system design and configurations, and house location and weather.

The U.S. Department of Energy (DOE) Lawrence Berkeley National Laboratory (LBNL) has a useful tool for estimating annual home energy use.

If you know the home’s actual energy use and cost, the U.S. Environmental Protection Agency (EPA)’s Energy Star website can also assess the Home Energy Star rating.