Window Replacement Cost Calculator
Estimate window replacement cost per window and total project cost. Compare vinyl, wood, fiberglass, and aluminum frames, double vs triple pane, and calculate energy savings payback.
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Estimated Cost per Window (installed)
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Total Project Cost —
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Extended More scenarios, charts & detailed breakdown ▾
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Total Cost (Low)
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Professional Full parameters & maximum detail ▾
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Window Cost (materials)
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Trim & Casing —
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How to Use This Calculator
- Enter the number of windows, select size and frame material.
- Results show estimated cost per window and total installed cost.
- Use Mixed Types tab if you have different window sizes — enter count and cost for up to 3 types.
- Use Energy Savings tab to estimate your payback period.
- Switch to Professional for full project breakdown including trim, permit, and contingency.
Formula
Total Cost = (Material per window × count) + (Labor per window × count) + trim + permit + contingency
Payback = Total Cost ÷ Annual Energy Savings
Example
10 double-hung vinyl windows (double pane Low-E, replacement): Material ≈ $4,025, Labor ≈ $1,800, Trim ≈ $750, Permit $150, 10% contingency → Total ≈ $7,400. At $250/yr savings → payback ≈ 30 years.
Frequently Asked Questions
- The average replacement window costs $300–$900 installed, depending on size and material. Vinyl windows are the most affordable ($300–$600), while wood and fiberglass windows run $500–$1,000+ per window.
- Replacement (insert) windows fit inside the existing frame without removing exterior trim or siding — ideal for renovations. New construction windows include a nail fin flange and require framing work, making them cheaper on a per-window basis but requiring more labor overall.
- Yes. Replacing single-pane windows with double-pane Low-E windows typically saves 10–25% on heating and cooling bills. Triple-pane Low-E with argon fill can save up to 30% in cold climates.
- Vinyl windows last 20–40 years. Fiberglass windows can last 50+ years. Wood windows last 30+ years with proper maintenance.
- Replacing all windows at once is more economical — you save on labor mobilization costs and get consistent appearance. Doing them one at a time can spread cost over time but typically costs 15–25% more per window.