Window Replacement Calculator

Estimate total cost to replace your windows

Number of windows

Frame material

Price per window ($, installed)

Frequently Asked Questions

How much does it cost to replace a window? ▼

A standard vinyl double-hung window typically costs $650-$1,300 installed in 2026, covering roughly 70% of US replacements. Fiberglass runs about 25-45% more than vinyl, and wood or clad-wood frames run roughly 60-130% more, mainly due to material and installation labor differences.

Why does frame material matter so much? ▼

Vinyl is the cheapest and most common because it's low-maintenance and doesn't need painting. Wood offers a classic look but needs more upkeep and costs significantly more; fiberglass sits in between, offering better durability and insulation than vinyl at a moderate premium.

Does window size affect the price? ▼

Yes — larger windows, bay/bow windows, and custom shapes cost more than a standard-size double-hung window. This calculator uses a flat per-window price, so adjust the price field upward for larger or custom windows.

Should I get a professional quote too? ▼

Yes — this gives a ballpark estimate using national averages. Get quotes from local contractors for an exact price, since labor rates, permit requirements, and window brand all vary by region and project.

Is there a federal tax credit for energy-efficient windows in 2026? ▼

No — the federal Energy Efficient Home Improvement Credit (Section 25C), which previously covered 30% of ENERGY STAR window costs up to $600, was repealed effective January 1, 2026 under the One Big Beautiful Bill Act. It only applies to windows purchased and installed by December 31, 2025. For 2026 installations, check for state, local, or utility-company rebates instead — some are still available even without the federal credit.

How window replacement cost is estimated

Window replacement is priced per window, installed. The calculator multiplies the number of windows by a typical installed price for the frame material you choose:

Total = number of windows × installed price per window

Example

Replacing 10 standard double-hung windows with vinyl at about $975 each costs about $9,750. In fiberglass at about $1,300 each the same job is about $13,000, and in clad wood at about $1,900 each it is about $19,000.

Typical installed price by material

Material	Per window	Pros and cons
Vinyl	$650 to $1,300	Lowest cost, low maintenance, limited colors
Fiberglass	25% to 45% more than vinyl	Strong and stable in heat, can be painted
Wood or clad wood	60% to 130% more than vinyl	Classic look, needs more upkeep inside

What changes the price

Insert vs full-frame: an insert (pocket) window fits into the existing frame and is cheaper; full-frame replacement removes everything down to the studs and is needed when the frame is rotted.
Size and style: bay, bow, casement and large picture windows cost more than standard double-hung units.
Glass: low-E coatings, argon fill and triple glazing add cost but cut heat loss; ENERGY STAR certification depends on your climate zone.
Access: second-story and hard-to-reach windows add labor.
Older homes: houses built before 1978 may have lead paint, which requires EPA-certified renovators.

Tax credit status

The federal Energy Efficient Home Improvement Credit (Section 25C), which covered 30% of qualifying window costs up to $600 a year, ended for windows installed after December 31, 2025. Some utilities and states still offer rebates for efficient windows, so check local programs before you buy.

New windows usually return part of their cost in resale value and lower energy bills. To estimate other exterior projects, use the siding calculator and the roofing calculator. To track the energy side, see the building energy efficiency calculator.