Impact window cost calculator

Impact windows cost $400 to $1,200 per window installed, or $40 to $70per square foot, on HomeGuide’s published figures. This calculator reads your window count against both, with every figure sourced.

This page is general information, not professional advice. It cannot see your openings, what is behind the old frames or what your county’s code requires, and the only number that counts is a written quote from an installer who has measured the house.

Figures last read from their sources on August 23, 2026.

Where every price on this page comes from

HomeGuide supplies the per-window installed band, the whole-house figure, the unit-only band and the labour line. HomeGuide supplies the per-square-foot band, the 24-inch by 42-inch reference opening, the permit line and the hurricane shutter comparison. Both were fetched and read first-hand on the date stamped above, and each is linked next to the figure it produced.

They are the same publisher and they do not agree, which is printed rather than smoothed over. A 7-square-foot opening reads $280 to $490 on one guide and $400 to $1,200 on the other. The tool shows both and gives you the span they cover together.

Why the inputs are a count and an opening size

Because those are the two units somebody published a price against. The per-window band is published per window; the per-square-foot band is published per square foot, against a stated reference opening. Anything else we could have asked for — your state, your frame material, your glass package — has no published figure attached to it, so a control for it would have to invent one.

That is also why there is no quantity ladder here. The same guide does publish a table for 1, 2, 5, 10, 15, 20, 25 and 30 windows, and it says explicitly that the table is for single-hung windows in basic frames. It is not an impact-window table and it is not used as one.

What moves a real quote off these numbers

Opening size first, then everything a catalogue cannot see: framing that has rotted behind the old window, stucco or siding that has to be cut and made good, an opening that is not square, a second-storey unit that needs lift equipment, and the glass package the engineering for your elevation actually requires. None of those is published as a factor, so none of them is applied here. They are the questions to put on the quote.

The deeper pages behind this tool: what impact windows cost, windows against shutters, the negatives nobody prints and the quote checker.

Questions people ask about this

How much do impact windows cost for 12 windows?

On HomeGuide's per-window band that is $4,800 to $14,400 installed, and on its per-square-foot band applied to twelve 24-inch by 42-inch openings it is $3,360 to $5,880. The two published figures do not agree, so this tool shows both and never averages them.

Why are there two answers instead of one?

Because HomeGuide prices the same product twice. Its window replacement guide gives $400 to $1,200 per hurricane window installed; its hurricane shutters guide gives $40 to $70 per square foot, stated as $280 to $490 for a 24-inch by 42-inch opening. Both are published. A single midpoint would be our invention.

Why is there no control for my state?

Because nobody publishes a state or city multiplier for impact windows. Where you live changes which products your code will accept and what a crew charges, and neither of those is published as a factor we could apply honestly.

Why can I not price sliding glass doors here?

No source we can read publishes a price for an impact sliding glass door. Stretching the window band across a door would be inventing a figure, so the tool leaves doors out and the copy says so. Ask your bidder to price doors as their own line and compare that line across three quotes.

Does this calculator give me a quote?

No. It gives you published ranges for your window count and shows what each line does to them. Only an installer who has measured your openings can quote the job, and you should get three of those in writing on the same opening schedule.