Welcome to our guide to standardwindowsizes, including charts for popular types such as double and single-hung, casement, picture, slider, and bay window dimensions.
Homes that are 30 to 50 years old are typically fitted with standardwindowsizes that apply to many opening types and shapes.
Manufacturers have defined measurements for each kind of window in several different measurements. However, whether you’re shopping for new home, or replacement windows, it makes a tremendous difference when ordering.
A new home build has openings precisely measured, and the windows, generally standardsizes, fit in the rough opening with little to no adjustments.
Whereas replacement windows, even if they’re standarddimensions, may mean more adjustments need to be made to the existing opening. Knowing what to expect before ordering windows saves a lot of time and money for any homeowner.
This guide contains information about standardwindowsizes and the many variations you may encounter when purchasing. Included at the end is a section on how to measure windows and a handy list of FAQ’s.
The most common style is a double hung window, which slides up and down, found in many homes. The width of these windows includes the standard measurements of 24-inches wide, 28, 32, and 40-inches.
Window Height
The same window’s standard height includes 36-inches, 44, 52, 54, and 62-inches. (See more in the windowsize charts below.)
When shopping for windows, it’s just as important to know the individual dimensions of the panes on your home as the manufacturer’s standardwindowsizes.
However, starting with the standardsizes allows a foundation to perform accurate measurements. Today’s suppliers provide a numeric replacement code to help homeowners identify the correct windows. This sizing process is known as the windowsize notation.
For example, a standard single hung window that is 2-feet, 9-inches wide, and 3-feet, 4-inches high would include a size notation of “2934.” The size notation includes four numbers; the first two digits represent the width, and the second two digits represent the height.
These notations are the manufacturer’s measurements with an additional ½ inch less or more to provide room for installation. For example, a “4444” size notation represents a window 44-inches wide and 44-inches tall.
The actual measurement may be 43 ½-inches wide by 44 ½-inches high. The ½-inch provides room for flashing materials and ensures the window opens and closes easily.
Another way a measurement is noted is with an actual size of 29.5-inches wide and 35.5-inches high and a common size of 30-inches wide and 36-inches high.
The common size is the standardwindowsize, and both these measurements may be found in the product listed specifications and label. Some manufacturers may use their own notation numbers, so always check with the sales clerk before you buy.
Below are the standardsizes for the different types of windows. When measuring for custom windows, it helps to begin with these common dimensions.
Double and Single Hung Window Sizes
TYPE
STANDARD WIDTHS
STANDARD HEIGHTS
SIZE NOTATIONS
Double Hung WindowStandardSizes and Single Hung WindowStandardSizes
(They measure the same for standardsizes)
24-in
24-in
24-in
24-in
24-in
24-in
24-in
24-in
36-in
44-in
48-in
52-in
54-in
60-in
62-in
70-in
2030
2038
2040
2044
2046
2050
2052
2060
28-in
28-in
28-in
28-in
28-in
28-in
28-in
28-in
36-in
44-in
48-in
52-in
54-in
60-in
62-in
70-in
2430
2438
2440
2444
2446
2450
2452
2460
32-in
32-in
32-in
32-in
32-in
32-in
32-in
32-in
36-in
44-in
48-in
52-in
54-in
60-in
62-in
70-in
2830
2838
2840
2844
2846
2850
2852
2860
40-in
40-in
40-in
40-in
40-in
40-in
40-in
40-in
36-in
44-in
48-in
52-in
54-in
60-in
62-in
70-in
3430
3438
3440
3444
3446
3450
3452
3460
44-in
44-in
44-in
44-in
44-in
44-in
44-in
44-in
36-in
44-in
48-in
52-in
54-in
60-in
62-in
70-in
3830
3838
3840
3844
3846
3850
3852
3860
48-in
48-in
48-in
48-in
48-in
48-in
48-in
48-in
36-in
44-in
48-in
52-in
54-in
60-in
62-in
70-in
4030
4038
4040
4044
4046
4050
4052
4060
Picture Window Sizing
TYPE
STANDARD WIDTHS
STANDARD HEIGHTS
SIZE NOTATIONS
Picture WindowStandardSizes
24-in
24-in
24-in
24-in
24-in
24-in
24-in
24-in
24-in
12-in
18-in
24-in
36-in
48-in
52-in
60-in
72-in
96-in
2010
2016
2020
2030
2040
2044
2050
2060
2080
36-in
36-in
36-in
36-in
36-in
36-in
36-in
36-in
36-in
12-in
18-in
24-in
36-in
48-in
52-in
60-in
72-in
96-in
3010
3016
3020
3030
3040
3044
3050
3060
3080
48-in
48-in
48-in
48-in
48-in
48-in
48-in
48-in
48-in
12-in
18-in
24-in
36-in
48-in
52-in
60-in
72-in
96-in
4010
4016
4020
4030
4040
4044
4050
4060
4080
60-in
60-in
60-in
60-in
60-in
60-in
60-in
60-in
60-in
12-in
18-in
24-in
36-in
48-in
52-in
60-in
72-in
96-in
5010
5016
5020
5030
5040
5044
5050
5060
5080
72-in
72-in
72-in
72-in
72-in
72-in
72-in
72-in
72-in
12-in
18-in
24-in
36-in
48-in
52-in
60-in
72-in
96-in
6010
6016
6020
6030
6040
6044
6050
6060
6080
96-in
96-in
96-in
96-in
96-in
96-in
96-in
96-in
96-in
12-in
18-in
24-in
36-in
48-in
52-in
60-in
72-in
96-in
8010
8016
8020
8030
8040
8044
8050
8060
8080
Single Slider Window Measurements
TYPE
STANDARD WIDTHS
STANDARD HEIGHTS
SIZE NOTATIONS
Single Slider WindowStandardSizes
36-in
36-in
36-in
36-in
12-in
14-in
18-in
24-in
3020
3030
3040
3050
48-in
48-in
48-in
48-in
12-in
14-in
18-in
24-in
4020
4030
4040
4050
60-in
60-in
60-in
60-in
12-in
14-in
18-in
24-in
5020
5030
5040
5050
72-in
72-in
72-in
72-in
12-in
14-in
18-in
24-in
6020
6030
6040
6050
84-in
84-in
84-in
84-in
12-in
14-in
18-in
24-in
7020
7030
7040
7050
Casement Window Standard Sizes
TYPE
STANDARD WIDTHS
STANDARD HEIGHTS
SIZE NOTATIONS
Casement WindowStandardSizes
12-in
12-in
12-in
12-in
12-in
12-in
14-in
18-in
24-in
30-in
1616
1618
1620
1626
1656
14-in
14-in
14-in
14-in
14-in
12-in
14-in
18-in
24-in
30-in
1816
1818
1820
1826
1656
18-in
18-in
18-in
18-in
18-in
12-in
14-in
18-in
24-in
30-in
2016
2018
2020
2026
2056
24-in
24-in
24-in
24-in
24-in
12-in
14-in
18-in
24-in
30-in
2616
2618
2620
2626
2656
30-in
30-in
30-in
30-in
30-in
12-in
14-in
18-in
24-in
30-in
3016
3018
3020
3026
3056
Bay Window Common Sizes
The size of the opening determines how a bay or bow window is configured. Bay and bow windows can be made from casement, double hung, and fixed frames. Fixed styles are typically used when the design is just for appearances.
Architecture offers various forms of the bay window, which is usually a window that extends outside, beyond the exterior wall. Sometimes bay windows rise up from the ground; sometimes they are self-supported. – Log Home Design, January 2002
A bay or bow window that opens is preferred in living rooms, kitchens, and bedrooms for air circulation. Bay and bow designs are sized according to the existing rough opening and made with several sashes.
The difference in standardsizes for bay and bow windows is based on the angle and the size of the three sashes. Typically, the middle sash is ½ the total width of the window, and the two side sashes are ¼ the window width.
TYPE
TYPE & ANGLE
STANDARDSIZES
Middle Window width
and Side Windows width
Projection from Outside Wall
Bay WindowStandardSizes and Projection from Wall
30-Degree 3-sash Bay
36-in
18-in
10 -in
48-in
20-in
11 7/8-in
60-in
24-in
13 1/8-in
72-in
30-in
16 7/8-in
45-Degree 3-sash Bay
36-in
18-in
15 3/8-in
48-in
20-in
16 3/4-in
60-in
24-in
19 5/8-in
72-in
30-in
23 7/8-in
Awning Window Height & Width
TYPE
STANDARD WIDTHS
STANDARD HEIGHTS
SIZE NOTATIONS
Awning WindowStandardSizes
12-in
12-in
1616
14-in
14-in
12-in
14-in
1816
1818
18-in
18-in
18-in
12-in
14-in
18-in
2016
2018
2020
24-in
24-in
24-in
24-in
12-in
14-in
18-in
24-in
2616
2618
2620
2626
30-in
30-in
30-in
30-in
12-in
14-in
18-in
24-in
3016
3018
3020
3026
Standard Bedroom Window Opening Sizes
Standardbedroomwindowsizes are larger than years ago to allow more light and fresh air in the room. There are standardsizes found in new home builds and existing homes.
Below are the sizes and include either single hung or double hung windows, the most common types used in bedrooms. Other types of bedroom windows include sliders.
TYPE
STANDARD WIDTHS
STANDARD HEIGHTS
BedroomWindowSizes
24-in
36-in
24-in
46-in
28-in
54-in
28-in
66-in
28-in
70-in
34-in
46-in
34-in
62-in
Sizes For Bathroom Windows
There aren’t any tried and true standard bathroom window sizes besides the standard single hung and double hung options, whose measurements depend on the location and square footage of the bathroom.
As a general rule standard bathroom picture windows range from 24″ to 96″ wide and 12″ to 96″ high. A standard bathroom sliding window ranges from 36″ to 84″ wide and 24″ to 60″ high.
Many bathroom windows are associated with privacy, meaning small dimensions. However, depending on the size of the bathroom, location of the opening, and type, these measurements vary. Bathrooms present much less working space than other rooms in a home.
When possible, the largest sizeopening should be chosen for a bathroom to allow more natural light and airflow. If a bathroom is on a second or third floor and is out of view from onlookers or neighbors, a large bay or bow window is a great choice.
Many homes use glass blocks or frosted glass panes above a jet tub or in a shower, providing extra privacy. Typical bathroom windows include single hung and double hung openings.
A great design element in a bathroom is adding several windows, such as a horizontal block of transom style or two single hung windows side-by-side with wall space in between.
Short, wide casement windows are great to add to the upper part of a shower when privacy is needed, and a short, wide slider works as well.
Window Replacement Frequently Asked Questions
Should I replace all my windows at once, or can I replace a few at a time?
It may save money up front to replace a few windows, but it will cost more if the entire house needs replacement.
Buying all the replacements in one order provides seller discounts, and the cost of labor to install is lower when the whole house is done in one job.
For the installers to be at your home, bring the required equipment, and manage work schedules, one complete job costs less.
It is also a good idea to get several quotes from different manufacturers. Compare each product’s material quality and warranty, and see if they offer installation and final out-the-door pricing to ensure it meets your budget.
What season is the best to have windows installed?
The best season to have replacement windows installed is preferably in the warm weather months. Once the existing ones are removed, cold and inclement weather poses trouble for expanding new frames.
Any extreme temperatures may cause caulking for sealing the windows to perform poorly, leading to possible air leakage later. If the weather is too hot, such as summers in the high deserts of Arizona, the intense heat will infiltrate your home.
Vinyl and aluminum windows, if exposed to extreme heat or cold, will expand. This may cause gaps between the rough opening and frame after the temperatures return to a moderate level.
Can I install my replacement windows myself?
If you’re a licensed contractor and have plenty of experience, the answer is yes, you can install them yourself. If you’re a DIY homeowner, it’s not recommended.
Are replacement purchased windows the same size as new construction windows?
Replacement windows present some challenges. New construction ones do not. New home builds mean precut openings, professional builders, and proper fitting.
Replacement products involve precise measurements with the possibility of adjustments once purchased. The rough opening for new products includes nailing fins when they are installed.
These replacement products, although water-tight, do not require or include nailing fins, possibly allowing some water infiltration.
Always use replacement windows for existing homes. Once an old one is removed, other elements that are affected include the wall, trim, and siding, causing a new construction product not to fit properly.
Replacement windows slide into the existing space and typically only require some trim adjustments. This ensures a better fit. We’ve written an article about replacement vs new construction windows here.
Is it worth it to replace windows?
Purchasing and professionally installing the correct size means preventing energy loss and reducing monthly heating and cooling costs.
On the Energy.gov website, the result of improperly fitting windows causing air leaks leads to a large amount of energy loss.
“Heat gain and heat loss through windows are responsible for 25%–30% of residential heating and cooling energy use.” (Source: Energy.gov)
In addition to saving on energy costs, the replacements can provide a tax advantage, offer more security, increase home value, look more attractive, reduce noise, are often easier to clean, and keep the home interior more comfortable throughout the year.
How to Measure for New Windows?
Measuring for replacement windows isn’t as difficult as it may sound, but if measurements are wrong, it will cost a high price when the products you ordered don’t fit. If the company you’re purchasing from offers free measurement services, let them do the measuring.
If you have to measure yourself, below are the steps to measure for replacement windows.
• Check that they are square by holding a tape measure inside the glass in the top right corner. Pull the tape measure down to the bottom left corner and write down the measurement.
Reverse this and measure from the top left to the bottom right. The opening is square if the two measurements match or are within ¼-inch of each other. If not square, the frame will need to be adjusted.
• Measure the width, not including the trim, by placing the measuring tape on the left side inside jamb and stretching it to the inside of the jam on the right side.
Do this for three different spots, in the middle and near the top and bottom, and use the largest number for the width.
• To measure a window’s height, extend the tape measure from the sill to the top of the opening. Do not measure from the trim board. The sill is where the window sash sits when closed.
Do this measurement from the middle of the sill, the right, and the left sides. Take the largest number, and this is the height of the window.
Always double-check your measurements, and if possible, have someone else check them and compare the results.
See more related content in our article about the different bathroom window sizes on this page.
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Hi Bob, we don’t sell replacement windows. The price you pay will be dependent on the area you live and local installation costs. Its a good idea to get several local contractor estimates that include the total price with installation to determine the best option for your home and budget.
model 2656 and 3026
replacement windows ?cost
Hi Bob, we don’t sell replacement windows. The price you pay will be dependent on the area you live and local installation costs. Its a good idea to get several local contractor estimates that include the total price with installation to determine the best option for your home and budget.