Window Replacement Cost Calculator & Estimator

It returns a planning range from a published editorial pricing model, not a quote. Published 2026 national averages differ widely, from $517 per window in This Old House's survey to $1,047 in Modernize's project data, so treat any single number with caution and compare at least three written, itemized quotes.

Yes. Full-frame replacement removes the old frame down to the rough opening, so it takes more labor and trim work. This calculator adds 25%. HomeAdvisor puts full-frame labor at $150–$800 per window versus $100–$300 for a retrofit insert. See the full-frame vs. insert calculator.

Usually. This model adds 12% for upper-floor windows to cover ladders, staging and slower work. Angi notes labor can rise to $600 or more per window for upper-story or complex installs.

They measure different things. Modernize averages more than a million of its own project records ($1,047). Angi averages 17,857 projects ($750 per window), and This Old House surveyed 1,000 homeowners ($517). Project mix, window size and what counts as "installed" all differ.

Partly. In the 2025 Cost vs. Value Report, a midrange vinyl window replacement cost $22,073 nationally and added an estimated $16,657 at resale, or about 76% of its cost. Wood windows recouped about 70%. Your market can be higher or lower.

Yes. It's free with one line of code, and you can preset the style or frame. See embed the calculator.

Measure from inside, to the nearest 1/8 inch. For width, measure jamb to jamb near the top, middle and bottom; for height, measure head to sill on the left, center and right. Use the smallest of each. Then check square by measuring both diagonals: Andersen says openings within 1/8 inch of each other are square (Andersen, How to measure windows). These numbers are enough to start comparing prices. Andersen recommends leaving ordering measurements to an installer, because old openings are often out of square and sizing changes with insert, full-frame or flanged units. For this calculator you don't need exact sizes: count the openings, note the style of each and which are upstairs.

The rough opening is the framed hole in the wall; the window's frame size is smaller so it can be shimmed level, plumb and square. Andersen's 100 Series custom-size guide says the window should typically be 1/2 inch narrower and 1/2 inch shorter than the rough opening (Andersen measurement guide). Other brands specify more: Loewen recommends a rough opening 3/4 to 1 inch larger than the window (Loewen installation guide, June 2026). JELD-WEN's guide says to take three measurements each way, report the smallest, and call a professional if they differ by more than 1/8 inch (JELD-WEN JMI003). Always follow the deduction for the exact product you order.

For an insert (pocket) window, you measure inside the existing frame: side jamb to side jamb, and from the sill just behind the interior stool up to the head jamb, keeping the smallest numbers. Andersen's 100 Series insert guide requires a pocket at least 3-1/4 inches deep, a frame free of rot that can't be repaired, and a plumb, level and square opening; for a square opening it subtracts 3/8 inch from width and height (Andersen insert measurement guide). For full-frame replacement, the interior trim comes off and you measure the rough opening instead (JELD-WEN JMI003). Not sure which applies? Price both with the full-frame vs. insert calculator.

Many manufacturers use a four-digit code: the first two digits are the width in feet and inches, the last two the height. Pella's example: 2438 means 2 feet 4 inches wide by 3 feet 8 inches tall, or 28 by 44 inches. Popular single- and double-hung sizes in Pella's guide include 2030, 2044, 2840 and 2852; common casements include 2436, 2640, 2850 and 3060. The same code can describe the rough opening or the unit itself, so confirm which one a quote means (Pella, Making Sense of Standard Window Sizes, updated May 21, 2026). Pella also notes that "standard" doesn't mean in stock, and that in a replacement job a custom size built to the existing opening can cost less than reframing the wall to fit a standard one.

For this estimator: the number of windows you're replacing, the style (single-hung, double-hung, sliding, casement, awning, picture or bay/bow), frame material, glass package, insert or full-frame installation, whether the windows are on an upper floor, and your area's cost level. You don't need exact measurements, because the model uses typical installed sizes for each style; unusually large or custom-shaped openings will price higher. If your house mixes styles, the whole-house calculator lets you enter each style separately. The methodology page lists every multiplier, so you can see exactly how each choice moves the range.

Replacing them together usually lowers the cost per window. Angi recommends no fewer than five to eight windows per job, and at least 10 to get the full savings, because installers often bid a flat rate and their overhead is the same for a short job as a full day (Angi, updated July 9, 2026). One project also keeps every window the same model, which matters because manufacturers update or discontinue lines. Phasing still makes sense when only a few windows have failed or the budget won't stretch. Price both ways: run the calculator for the full house, then for the first phase, and ask installers for a quote on each. For per-window price context, see Window Cost Estimate's whole-house cost guide.

It depends on what you're replacing and where you live. The Department of Energy says heat gain and loss through windows account for 25%–30% of residential heating and cooling energy use (DOE, Home Upgrades). ENERGY STAR says replacing poor-performing windows with certified models saves about 12% on energy costs on average, or $200–$600 a year depending on location (ENERGY STAR windows key messaging, 2024). Its 2023 modeling of whole-home replacement found average savings of $493–$568 a year when replacing single-pane clear glass, but $253–$373 when replacing double-pane clear glass, depending on climate zone (ENERGY STAR, October 2023).

Simple payback is project cost divided by yearly energy savings. Using this calculator's default 10-window vinyl project (typical point $6,800) and ENERGY STAR's $200–$600 average annual savings range (ENERGY STAR, 2024), energy savings alone would take roughly 11 to 34 years to cover it. That's an illustration, not a forecast: your bill, climate and the windows you're replacing set the real savings. Payback is shorter when you're replacing single-pane glass, when rebates apply, or when the windows need replacing anyway, in which case only the extra cost of a more efficient unit should be counted. Resale value matters too; see the home value answer above.

Both come from the NFRC label. U-factor measures how well a window keeps heat from escaping; lower is better. SHGC (solar heat gain coefficient) measures how much solar heat gets through; low numbers block it, high numbers let it in (NFRC, What does the NFRC label tell you?). DOE's Federal Energy Management Program says residential U-factors typically run 0.2 to 1.2 and SHGC 0.20 to 0.80, with low-gain products (below 0.4) suited to hot climates and high-gain products (above 0.55) to cold ones (DOE FEMP). DOE also advises comparing whole-unit ratings rather than center-of-glass figures. In this calculator, Low-E and triple-pane glass options stand in for better ratings; ask for the NFRC numbers on every quote.

Not for new installs. The federal Energy Efficient Home Improvement Credit (Section 25C), which covered 30% of qualifying window costs up to $600 a year, isn't allowed for property placed in service after December 31, 2025 (IRS OBBB FAQ; IRS credit page). ENERGY STAR certification still matters: certified products are independently tested and verified by NFRC and must meet EPA criteria for your climate zone (ENERGY STAR, What makes it ENERGY STAR?). Check your utility and state for current rebates, and don't count on a federal credit when working out payback.