Welcome to our guide to standard window sizes including size charts for popular types and dimensions. Homes that are 30 to 50 years old are typically fitted with standard window sizes that apply to many types and shapes of windows.
Manufacturers have defined measurements for each kind of window in several sizes. However, whether you’re shopping for new home windows or replacement windows makes a tremendous difference when ordering.
A new home build has window openings precisely measured and the windows, generally standard sizes, fit in the rough opening with little to no adjustments.
Whereas replacement windows, even if they’re standard sizes, 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 standard window sizes and the many variations you may encounter when purchasing windows. Included at the end, is a section on how to measure windows and a handy list of FAQ’s.
Table of Contents
What Is A Standard Window Size?
When shopping for windows, it’s just as important to know the individual sizes of the windows on your home as the manufacturer’s standard window sizes.
However, starting with the standard sizes allows a foundation to perform accurate measurements. Today’s window suppliers provide a numeric, replacement window size to help homeowners identify the correct windows. This window sizing process is known as the window size notation.
As an 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 window size notation includes four numbers; the first two digits represent the width and the second two digits represent the height.
These notations are the manufacture’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 window size 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 standard window size and both these sizes may be found in the windows listed specifications and label. Some manufacturers may use their own size notation numbers so always check with the sales clerk before you buy.
Standard Window Width – The most common window is a double hung window, which slides up and down, found on many homes. The width of these windows includes the standard measurements of 24-inches wide, 28, 32, and 40-inches.
Standard Window Height – The same window’s standard height includes 36-inches, 44, 52, 54, and 62-inches. (See more in the window size charts below.)
Below are the standard window sizes for the different types of windows. When measuring for custom windows, it helps to begin with these common sizes.
Double Hung Window Sizes
and
Single Hung Window Sizes
WINDOW TYPE
STANDARD WIDTHS
STANDARD HEIGHTS
SIZE NOTATIONS
Double Hung Window Standard Sizes and Single Hung Window Standard Sizes
(Video) KINRAZ- A Basic Size Kitchen Cabinet Wall Layout
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 Sizes
The size of the window opening determines how a bay or bow window is configured. Bay and bow windows can be made from casement windows, double hung, and fixed windows. Fixed windows are typically used when the window is just for appearances.
A bay window or bow window that opens is preferred in living rooms, kitchens, and bedrooms for air circulation. Bay and bow windows are sized according to the existing rough opening and made with several sashes.
The difference in standard sizes for bay and bow windows are based on the angle of the windows and 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.
WINDOW TYPE
TYPE & ANGLE
STANDARD SIZES
Middle Window width and Side Windows width
Projection from Outside Wall
Bay Window Standard Sizes 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 Sizes
WINDOW TYPE
STANDARD WIDTHS
STANDARD HEIGHTS
SIZE NOTATIONS
Awning Window Standard Sizes
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 Sizes
Standard bedroom windows sizes are larger than years ago to allow more light and fresh air in the room. There are standard sizes found in new home builds and existing homes.
Below are the sizes and include either single hung windows or double hung windows, the most common types used in bedrooms. Other types of bedroom windows include sliders.
WINDOW TYPE
STANDARD WIDTHS
STANDARD HEIGHTS
Bedroom window Sizes
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
Bathroom Window Sizes
There aren’t any tried and true standard bathroom window sizes besides the standard single hung and double hung windows whose size depends on the location and size 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 from 24″ to 60″ high.
Many bathroom windows are associated with privacy meaning small sizes. However, depending on the size of the bathroom, location of the window, and type of window, bathroom window sizes vary. Bathrooms present much less working space than other rooms in a home.
When possible, the largest size window should be chosen for a bathroom to allow more natural light and air flow. If a bathroom is on a second or third floor and is out of view from onlookers or neighbor’s windows, a large bay or bow window is a great choice.
Many homes use glass block windows or frosted glass above a jet tub or in a shower providing extra privacy. Typical bathroom windows include single hung and double hung windows.
A great design element in a bathroom is adding several windows such as a horizontal block of transom windows 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 Sizes 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 windows replaced.
Buying all the windows in one order provides seller discounts and the cost of labor to install the windows is lower when the whole house is done in one job.
In order for the window installers to be at your home, bring the required equipment, and manage work schedules, one complete job costs less.
What season is the best to have replacement windows installed?
Warm weather is always preferred for replacement installation. Once the existing windows are removed, cold and inclement weather poses troubles. If the weather is too hot, such as summers in the high deserts of Arizona, the intense heat will infiltrate your home.
Any extreme temperatures may cause caulking for sealing the windows to not perform well leading to possible air leakage later.
Vinyl and aluminum windows, if exposed to extreme heat or cold, will expand. This may cause gaps between the rough opening and window 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. If you’re a DIY homeowner, it’s not recommended.
Are Replacement Windows The Same Size As New Construction Windows?
Replacement windows present some challenges new construction windows do not. New home builds mean precut window openings, professional builders, and proper fitting.
Replacement windows involve precise window measurements with the possibility of adjustments once the windows are purchased. The rough opening for new windows includes nailing fins when the window is installed.
Replacement windows, although water tight, do not require or include nailing fins possibly allowing some water infiltration.
Always use replacement windows for existing homes. Once a window is taken out, other elements that are affected include the wall, trim, and siding causing a new construction window to not fit properly.
Replacement windows slide into the existing window 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.
How To Measure For Replacement Windows
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)
Purchasing the right size windows means preventing energy loss and reduces monthly heating and cooling costs.
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 windows you ordered don’t fit. If the company you’re purchasing the windows 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 the windows are square by holding a tape measure on the inside of the window 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 window is square of 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 window trim, by placing the measuring tape on the left side inside jam and stretching it to the inside of the jam on the right side.Do this for three different spots on the window, 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 window 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.
Widths can be 2 feet, 3 feet, 4 feet, 5 feet, 6 feet, and 8 feet.Standard heights can range from 2 feet tall to 8 feet tall, with additional heights of 18, 52, 54, and 62 inches. Rough openings are in whole numbers, while 1/2 inch is taken from each rough opening size to get the actual window size.
The most common widths for picture windows are 2 ft, 3 ft, 4 ft, 6 ft, and 8 ft. Standard picture window heights can range from 1 ft to as tall as 8ft.
Use a tape measure to measure the height of the window from top to bottom in three different places. Make note of the largest of the three measurements just in case the window is not uniform in height. Then measure across the window from outside jamb to outside jamb to see how wide the window is.
As the typical choice for new homes, double-hung models come in a few standard window sizes: The standard width for double-hung windows ranges from 24 inches to 48 inches. Standard heights for double-hung windows range from 36 to 72 inches.
96 inches or 8 ft. is now very common for newer homes and stock exterior doors are also commonly available in 30 and 32-inch widths. Some door manufacturers sell doors in 7ft & 8ft heights and door widths from 24 inches to 42 inches. The height for fiberglass or steel doors are fixed at 6 ft. 8 inches tall and 8 ft.
The vast majority of residential windows use Single Strength glass which is 3/32” thick. For larger windows, Double Strength, or 1/8” thick glass may be required.
How to Measure for Shades and Blinds. If you've ever wondered what the standard size of window blinds is, the standard window length ranges from 36 to 72 inches, and the standard width ranges from 24 to 60 inches. However, window sizes and shapes can vary greatly, especially in older homes or homes with custom windows.
Standard horizontal sliding window sizes come in 36-inch, 48-inch, 60-inch, 72-inch and 84-inch versions. Standard vertical sliding window sizes come in 24 inches, 36 inches, 48 inches and 60 inches tall. Sliding window sizes can be custom ordered and made to fit spaces a traditional double hung window might not.
Press Alt + Space shortcut keys together on the keyboard to open the window menu. Now, press S. The mouse cursor will turn into a cross with arrows. Use the left, right, up and down arrow keys to resize your window.
Standard Window Sizes For Mobile Homes. The vast majority of windows in mobile homes are going to be one of three sizes. These are 30 inches by 60 inches, 36 inches by 60 inches, and 36 inches by 54 inches.
Most homes have at least one standard bedroom window. They are typically small in size, particularly 24 x 36 inches. Standard bedroom windows are usually white in color and have a simple, rectangular design.
One size means every product is the same size, and one size fits all usually refers to a clothing item, again, they are all the same size pieces and they are designed to fit everyone. You get no choice in sizing in other words. And it's usually "one size fits most".
The most common door size is 36 inches wide by 80 inches tall, and almost 2 inches thick. For custom door orders, you'll need to know the door size, height, and door width. Anything below 32 inches won't work. Plus, you'll need to find the right door frame for your entry door.
Standard Kitchen Window Size. There are a few standard kitchen window sizes. The most common widths are 24″, 30″, and 36″. The most common heights are 48″, 60″, and 72″.
In US houses, most of the common size of the door is 80″x30″ with 2″ thickness. However, not all doors in the house have the same dimension. Doors size can vary from a minimum of 30 inches and as tall as 96 inches, and thickness can depend on the door material.
Windows makes it possible to complete all types of everyday tasks on your computer. For example, you can use Windows to browse the Internet, check your email, edit digital photos, listen to music, play games, and do much more.
Standard windows are three feet from the floor and about 18 inches from the ceiling. This is not an exact or precise rule, and there is some room for variety. You may need to adjust your window placement for better lighting or for aesthetic reasons, among others.
The Nominal size of a window is really the size needed for the rough opening. The real size of a window is its exact size (from one side of the frame to the other, horizontally then vertically). The difference in size between the real size of the window and its nominal side differs from vendor to vendor.
“Annealed glass” is basic glass manufactured using the standard float glass process. All glass made for windows, doors and skylights in North America is manufactured by the annealed process. This is also known as annealed glass unless it is subsequently heat treated.
An average sheet of window glass, otherwise known as 'Single Strength' glass↗, is 3/32” thick. Single strength glass is used in most residential windows. Glass for larger windows or doors will require thicker glass.
What Is Tempered Glass? Tempered glass, (also known as toughened glass) is made by heating annealed glass uniformly. The annealed glass is then cooled rapidly by blowing air uniformly onto both surfaces at the same time.
The most common standard vertical blind sizes that you can buy quick ship or off-the-shelf range from 24-inch x 72-inch to 72-inch x 72-inch. Wider or longer vertical blinds typically require a custom order. Trimmable length vertical blinds allow you to cut the vanes to a shorter length at home.
Determine the length for the left-most height, right-most height, and the center of your window. Use the longest measurement for the length. If you do not wish to have the blind touching the bottom of the window sill, subtract 1/4 th of an inch.
1) Measure the width inside the window opening at the top, and round down to the nearest 1/8" measurement. 2) Measure the height inside the window opening from the top of the window opening to the window sill. If your window does not have a sill, measure to the point you would like the blind to reach.
Most homes have at least one standard bedroom window. They are typically small in size, particularly 24 x 36 inches. Standard bedroom windows are usually white in color and have a simple, rectangular design.
Standard Window Sizes For Mobile Homes. The vast majority of windows in mobile homes are going to be one of three sizes. These are 30 inches by 60 inches, 36 inches by 60 inches, and 36 inches by 54 inches.
The typical depths on a window is between 1 and 5 inches and the depth required for your window treatment depends on which style you have chosen. Smaller coverings, like mini blinds
mini blinds
A mini blind is a type of horizontal window blind made of long, narrow slats held together by string. Its slats are less than half the width of a regular venetian blind, and are often made of aluminium, measuring 15 millimetres (0.59 in) or 25 millimetres (0.98 in).
Two standard window sizes are most common for bathrooms: Standard sliding window size: Width – From 36 to 84 inches (0.9 – 2.1 m)Height – From 24 to 60 inches (61 cm – 1.5 m)
Standard horizontal sliding window sizes come in 36-inch, 48-inch, 60-inch, 72-inch and 84-inch versions. Standard vertical sliding window sizes come in 24 inches, 36 inches, 48 inches and 60 inches tall. Sliding window sizes can be custom ordered and made to fit spaces a traditional double hung window might not.
There are four standard lengths for curtains: 63, 84, 96 and 108 inches. These lengths are used for pre-made, mall ready curtains. They come in a range of styles and designs from sheer to blackout, fabric, etc.
Standard windows are three feet from the floor and about 18 inches from the ceiling. This is not an exact or precise rule, and there is some room for variety. You may need to adjust your window placement for better lighting or for aesthetic reasons, among others.
The most common size for a mobile home door is 32 inches by 76 inches. Older mobile homes that were constructed before 1980 have slightly smaller doors. The standard for those doors is typically 32 by 72 inches.
The Nominal size of a window is really the size needed for the rough opening. The real size of a window is its exact size (from one side of the frame to the other, horizontally then vertically). The difference in size between the real size of the window and its nominal side differs from vendor to vendor.
A window opening size notation is split into four digits—the first two for width and the second two for height. These notations are simple to understand once you know what they're trying to say. For example, a 3638 window opening would measure at 3 feet 6 inches in width, and 3 feet 8 inches for height.
Introduction: My name is Aron Pacocha, I am a happy, tasty, innocent, proud, talented, courageous, magnificent person who loves writing and wants to share my knowledge and understanding with you.
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