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Window Replacement Cost Calculator

Total cost to replace windows, with payback from energy savings.

Enter your values

ⓘ Live results

Results
Total project cost
$8,500.00
Cost per window
$850.00
Annual energy saving
$288.00
Simple payback
29.5 years
20-year savings
-$2,740.00

Working

  1. 110 x ($600.00 + $250.00) = $8,500.00

Quick answer

Cost = number of windows x (unit price + installation), plus trim and disposal. Payback compares that to annual heating and cooling savings.

total = n x (unit + install); payback = total / annual savings

How to use the Window Replacement Cost Calculator

  1. 1Count the windows and choose the frame material you are pricing.
  2. 2Add realistic installation - full-frame replacement costs more than insert windows.
  3. 3Compare payback against how long you plan to stay in the home.

Worked example

Using the values the calculator loads with:

Inputs

  • Number of windows10
  • Window typeVinyl casement
  • Install cost per window250 $
  • Annual energy bill2400 $
  • Expected energy saving12 %

Results

  • Total project cost$8,500.00
  • Cost per window$850.00
  • Annual energy saving$288.00
  • Simple payback29.5 years
  • 20-year savings-$2,740.00
  1. 10 x ($600.00 + $250.00) = $8,500.00

Frequently asked questions

Do new windows pay for themselves?

Rarely on energy alone - typical payback is 15 to 25 years. The real wins are comfort, noise, condensation and resale value.

Insert or full-frame replacement?

Inserts are cheaper and quicker when the existing frame is sound. Full-frame is required if there is rot or you want to change the opening size.

About this calculator

Results are estimates for general information. For medical, legal, structural or financial decisions, confirm with a qualified professional.