Window Cost Calculator
Estimate installed window replacement cost by type, material, and glass.
A single new window costs $300 to $2,500 installed, and most homeowners land closer to $750 to $800 per window once labor is folded in. A window cost calculator gets you from that wide range to a number that actually fits your house, because the real price depends on three things: what the window is made of, what shape it is, and how many you’re replacing at once.
Plug your own numbers into the calculator above. The sections below walk through where each dollar goes, so the number on screen makes sense instead of feeling random.
What a window cost calculator actually weighs
Material is the first lever, and it’s a bigger one than most people expect. According to 2026 pricing from Angi and Fixr, the same window opening can cost three or four times more depending on what the frame is made of.
| Frame material | Typical installed cost per window | Why homeowners pick it |
|---|---|---|
| Aluminum | $75–$800 | Slim frames, least efficient, works fine in mild climates |
| Vinyl | $100–$900 | Most popular choice, low upkeep, decent insulation for the price |
| Composite | $300–$2,500 | Resists warping better than wood, costs more than vinyl |
| Wood | $150–$2,000 | Classic look, needs regular upkeep, widest price range of any material |
| Fiberglass | $400–$1,500 | Longest lifespan, strongest efficiency, priciest to install upfront |
Vinyl sits in the middle and that’s exactly why it’s the default in most quotes. It isn’t the cheapest option on the shelf, but it’s the one installers can source fast and price predictably, which keeps your total project estimate from swinging wildly between contractors.
Fiberglass is the one worth a second look if you’re planning to stay in the house a long time. It costs more up front, but it won’t warp, rot, or dent the way the cheaper materials can, and that changes the real cost over a 20-year horizon, not just the invoice you get this month.
Why a bay window costs four times what a single-hung does
Shape matters almost as much as material, and this is where a lot of ballpark estimates fall apart. A replacement windows cost calculator that only asks about material and skips window style will miss the biggest swing in the whole project.
| Window style | Typical installed cost | Note |
|---|---|---|
| Single-hung | $150–$700 | Simplest mechanism, cheapest to install |
| Double-hung | $150–$1,000 | Both sashes move, more common in older homes |
| Casement | $150–$1,200 | Cranks open, seals tightly against drafts |
| Sliding | $700–$1,500 | Wide glass area, simple hardware |
| Picture or fixed | $65–$1,600 | No moving parts, cheapest glass-only option |
| Egress (standard opening) | $100–$1,500 | Must meet a minimum clear opening for safety code |
| Egress (basement, in-well) | $2,000–$5,000 | Includes digging and the window well itself |
| Bay | $900–$7,100 | Three angled panels, structural support, trim work |
| Bow | $1,500–$8,000 | Four or more panels in a curve, the priciest standard style |
| Custom size or shape | $1,000+ | Anything that doesn’t match a stock size gets built to order |
Bay and bow windows aren’t just bigger pieces of glass. They stick out from the house, so they need extra framing, a roof or shelf underneath, and more trim work on both sides, which is why the price jumps so much compared to a window that sits flush in the wall.
Full house or just a few: how volume changes the math
A single window and a whole-house job don’t scale the same way. Angi’s data breaks the total down like this:
| Number of windows | Typical total cost |
|---|---|
| 6–8 | $4,500–$6,000 |
| 8–12 | $6,000–$9,000 |
| 12–16 | $9,000–$12,000 |
| 16–20 | $12,000–$15,000 |
| 20–24 | $15,000–$18,000 |
| 25 | $18,000–$20,000 |
Replacing more windows at once usually lowers your per-window price, since the installer isn’t paying a separate trip fee and setup cost for each job. If you’re only doing part of the house, aim for at least five to eight windows in one go. Doing just one or two at a time tends to cost more per window and leaves your home with visibly mismatched glass until you finish the rest.
The tax credit most homeowners get wrong
Here’s the part most window cost guides either skip or explain incorrectly. According to ENERGY STAR, you can claim a federal tax credit of 30% of your window cost, up to $600 total, if you install ENERGY STAR Most Efficient certified windows between now and the end of 2032.
The part people get wrong: that credit applies to the product cost only. Labor and installation don’t count toward it. So if your invoice lists $5,000 for materials and $2,000 for installation, your credit is based on 30% of the $5,000, not the full $7,000, and it still caps at $600 for the year regardless of how big that 30% works out to be.
There’s also a yearly ceiling to plan around. Windows and skylights share a $600 annual cap, and that sits inside a broader $1,200 total limit for all qualifying home envelope upgrades in a given tax year. If you’re replacing 15 or 20 windows, splitting the purchase across two tax years can let you claim the $600 credit twice instead of once.
Where you live changes the bill too
Labor rates aren’t the same in Topeka as they are in San Francisco, and that gap alone can move your total by hundreds of dollars before you’ve chosen a single material. A window price calculator that ignores location is really just giving you a national shrug.
There’s a bigger number hiding behind the sticker price, too. The U.S. Department of Energy reports that heat gain and heat loss through windows account for 25% to 30% of a home’s heating and cooling energy use. An old single-pane window isn’t just outdated. It’s actively costing you money every month it stays in the wall, which is worth weighing against the upfront number before you decide to wait another year.
Full-frame or insert: the other lever on cost
Most of the numbers above assume a full-frame replacement, where the installer removes the window down to the studs. There’s a cheaper path if your existing frame is still sound: an insert, or retrofit, replacement that fits a new window inside the old frame.
Full-frame labor runs $180 to $1,500 per window, while insert labor typically runs $100 to $300, according to Angi’s breakdown. The savings only hold up if the old frame isn’t rotted or badly out of square. A contractor can tell you which one your house qualifies for in about five minutes, and it’s worth asking before you assume you need the full-frame price.
(And if a contractor quotes you for a bow window without blinking, that’s your sign they’ve priced one before. It’s not a window most installers see twice a year.)
Before you call anyone, get the frame material and glass type written into the quote itself, not just a single project price. That split matters for two reasons: it’s how you compare one contractor’s number against another’s, and it’s the only way to know what counts toward that $600 tax credit once your windows are in.
Questions people ask about window cost calculators
How much does it cost to replace one window?
A single window typically runs $300 to $2,500 installed, with most homeowners paying around $750 to $800. The exact number depends on material, style, and glass type.
What’s the cheapest window material?
Aluminum generally comes in lowest, from about $75 to $800 per window installed. Vinyl is close behind and more common, since it balances cost with better insulation than aluminum offers.
Does replacing more windows at once actually save money?
Usually, yes. Installers often price a per-trip setup cost into small jobs, so bundling five or more windows into one project tends to lower the cost per window compared to doing them one at a time.
Will my location change the price much?
It can shift the total by hundreds of dollars per window, since labor rates vary a lot by region. A national average is a starting point, not your actual quote.
Can I get a tax credit for new windows?
Yes, if the windows are ENERGY STAR Most Efficient certified. The credit covers 30% of the product cost only, not installation, and caps at $600 per year through 2032.
Is an online window cost calculator accurate enough to budget from, or do I need a contractor quote?
It’s accurate enough to set a realistic budget range and spot an outlier quote. It isn’t a substitute for an actual in-home measurement, since things like old-frame condition and access can still move the final number.