Window Replacement ROI Calculator
Calculate window replacement return on investment including annual savings, payback period, and 20-year net savings.
Inputs
sq ft
Results
Annual Energy Savings
$222.75
Payback Period
53.9 years
20-Year Net Savings
-$7,545
Total Replacement Cost$12,000
20-Year ROI-62.87%
How to Use This Calculator
- Enter the Number of Windows and Average Window Area in sq ft for all replacements.
- Enter the Old Window U-Factor and New Window U-Factor to quantify the thermal improvement.
- Enter Energy Cost Per BTU, Replacement Cost Per Window, and local Heating and Cooling Degree Days.
- Review Annual Energy Savings and Total Replacement Cost.
- Check Payback Period in years, 20-Year Net Savings, and 20-Year ROI to evaluate the investment.
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