Window Energy Loss Calculator

Calculate how much energy your home loses through windows. Our free Energy Loss Calculator analyzes your current window setup — including glass type, frame material, age, and number of windows — and estimates how much energy and money you could save by upgrading to modern, high-performance windows.

How It Works

• Enter details about your home, including square footage, number of windows, and current window type (single-pane, double-pane, or triple-pane).
• The calculator estimates your annual energy loss in BTUs and dollars based on regional climate data.
• See a side-by-side comparison of your current windows versus upgraded Panes windows with Low-E coatings and argon gas fills.
• Get a personalized environmental impact estimate showing how many pounds of CO2 you could reduce each year.

Old, inefficient windows can account for up to 30% of a home's heating and cooling energy loss. Upgrading to energy-efficient windows pays for itself over time through lower utility bills, improved comfort, and potential rebates or tax credits. Use the calculator to see your projected savings.

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