Standard Window Size Guide

Most window manufacturers - Window World included - have a few standard window sizes that are designed to fit most homes. Knowing the precise size of your windows is essential if you’re replacing or installing new windows anywhere in your home. 

If you’re looking to redesign your home, understanding the process of how to size your windows correctly means you can save yourself time, money, and most importantly, the headache that comes with costly custom window mismeasurements! Learn more about standard window sizes here. 

What is the Standard Window Size?

If you're looking to remodel or renovate your home, you want to know what is the standard window size before you start. Most window manufacturers have pre-set window sizes given in terms of width and height in a four-digit number. For example, a 2426 window means the standard window width is 2'4" and the standard window height is 2'6".

How To Measure Your Windows

If you're ready to figure out the standard window size for any window in your home, you'll have to measure it excluding the frame itself. To measure a window, simply note the dimensions across the top, middle and bottom of the window horizontally, and then measure the left, middle and right side of the window vertically. The smallest of the measurements is the number you’ll use for standard window dimensions.

Write the dimensions for the width of standard windows first, followed by the height. To get the right window size, you'll typically add half an inch to your measurements, as manufacturers subtract half an inch to make room for installation. For instance, if you're measuring the standard window size for bedroom renovations, and your measurements are 35 ½”

wide by 71 ½", then you'll be looking for a 3672 window, or a window that's roughly 36" by 72".

Double Hung Window Sizes

Double hung windows are a popular choice and come in a variety of sizes. Standard double hung window sizes range from 24" to 48" wide and 36" to 72" in height. That's a lot of range for a window, so it's necessary to take accurate measurements to get the best standard double window size for your home.

Bay & Bow Window Sizes

Bay and bow windows extend past the wall of your home and allow a lot of natural light in. Bay windows typically consist of 3 separate windows angled at around 25 to 45 degrees, and bow windows have 4 or more separate windows angling between 10 and 25 degrees. Both come in standard sizes ranging from 3'6" to 10'6" wide and 3' to 6'6" in height.

Picture Window Sizes

Picture windows can allow extra light into your home and provide a scenic view. They typically don’t open, and they’re perfect for adding blinds. To find the standard window width for blinds or just for picture windows in general, note that their sizes range from 24" to 96" for both width and height.

Sliding Window Sizes

As the name suggests, sliding windows open from side to side and allow a lot of air in. They’re generally wider than they are tall. If you're wondering what is the width of a standard window for sliding windows, they range from 36" to 84" in width and 24" to 60" in height.

Casement & Awning Window Sizes

Both awning and casement windows have hinges that can open to let the breeze into your home. Awning windows have a hinge at the top and can be used during light rain showers. They come in sizes ranging from 2’ to 5’5”-5’ ⅞ ” wide, and 1’8” to 3’6” in height. Casement windows open from the side, and come in sizes ranging from 1’2” to 2’11 ½” wide and 2’5 ½” to 6’5 ½” in height.

Custom Windows

Not every home window will fit standard window sizes, and in this case, custom-ordering a window is a great option. You can reach out to professional window installers for the entire process, or you can take measurements using the method described here and hand them over to make a custom window. You can also fill your window opening to conform to standard sizes.

Final Thoughts

Measuring your windows and getting the dream home you've always wanted can be easier than you may think. Take your time getting your window measurements, and then shop around for the best style of window to suit your home. Using everything you’ve learned here, you can choose the windows that best suit your kitchen, bedroom, bathroom or any other room in your home!

Window World Replacement Windows

Window World Southern Nevada offers free quotes so you can get your project moving quickly. Request a Quote today to learn more.