How to Measure for Window Shutters

Are you looking to add extra interior design flair and charm to your home? Installing window shutters just might be the answer! Shutters bring a touch of classic elegance and can instantly update any space. But before you jump in, it’s important to make sure that you measure your window shutters correctly so that they fit perfectly within the opening.

In this post, we’ll walk through the step-by-step process of how to measure for window shutters — no guesswork required!

How to Measure for Window Shutters

Step-by-Step Guidelines on How to Measure for Window Shutters

Step 1: Measure the Window Opening Width and Height

When measuring for a shutter, it’s important to get the exact measurements of your windows from wall to wall (or jamb to jamb). Measure both the width and height of each window twice for accuracy. Make sure that you are recording these measurements in inches or millimeters — whatever your preferred unit of measurement is.

Step 2: Consider the Overlap Factor

When measuring for window shutters, you must factor in how much overlap between the shutter and the wall is desired. For example, interior mount shutters require a certain amount of overlap to ensure that they fit properly within the opening. The typical overlap factor for interior mount shutters is 1/2 inch to 1 inch.

Step 3: Decide on the Louver Size and Stile Width

The louver size and stile width are very important factors when measuring window shutters. Louvers refer to the individual slats that make up each shutter panel, while stiles refer to the frame that surrounds each shutter panel. It’s important to consider both of these factors when measuring to ensure a perfect fit.

Surrounds Each Shutter Panel

Step 4: Calculate the Shutters’ Width and Height

Once you have decided on the louver size and stile width, it’s time to calculate the width and height of your window shutter panels. To do this, simply subtract the overlap factor from both the width and height measurements. This will give you the exact width and height of your window shutter panels.

Step 5: Double Check Your Measurements

Before ordering your shutters, it’s important to double-check your measurements one more time! Make sure that all of the measurements are correct and that there are no discrepancies. It’s also a good idea to measure the windows a second time to ensure accuracy.

Now that you know how to measure for window shutters, it’s time to get started! Once you’ve gathered all of your measurements and ordered your shutters, the only thing left is to install them. With a few simple steps and careful measuring, you’ll be able to add a touch of classic style and charm to your home in no time!

Additional Tips and Tricks to Measure for Window Shutters

1. Double-check your measurements. Measure twice to make sure that you are getting the exact size of the window so that you get a perfect fit with your shutters.

2. When measuring for bay and bow windows, measure each individual opening separately and add them up to get the total measurement of all openings.

3. Remember to measure from the highest point of the window sill, include any trim or molding for your measurements.

4. For inside mount shutters, make sure that you have at least 1/2” clearance from the window opening so your shutters will fit and function properly.

5. When measuring for outside mount shutters, measure the full width and height of the outside window frame.

6. If you are ordering a custom shutter size, make sure that your measurements are accurate as there is usually no room for adjustments once the shutter is made.

Check to See if Your 
Window Has Any Obstructions

7. Check to see if your window has any obstructions that could interfere with the shutters. For example, if your window has a crank or handles on it, you may need to opt for an outside mount shutter.

8. If you are having trouble measuring odd-shaped windows, consider getting help from a professional or someone who has experience with measuring shutters.

Following these tips and tricks can help ensure that your window shutters fit perfectly. Taking the time to get accurate measurements will save you money in the long run, as it will prevent any costly mistakes or returns due to incorrect sizing. Remember – measure twice, cut once! With a few simple steps, you’ll be ready to order your perfect window shutters!

Common Mistakes in Measuring for Window Shutters

1. Not Measuring Each Individual Window:

When measuring window shutters, it is important to measure each window individually. Even if two windows appear to be the same size, they may not actually be exactly the same and should thus be measured separately in order to ensure that you get the right fit. If you don’t measure each window separately, you run the risk of purchasing shutters that don’t fit properly.

2. Not Measuring the Right Areas:

When measuring for window shutters, it is important to measure both the inside and outside areas of your windows. This will help ensure that your new shutters fit snugly against the frame of each window and will be aesthetically pleasing.

3. Not Accounting for Obstructions:

When measuring for shutters, it is important to remember to account for any obstructions that may get in the way of your shutters. Common obstructions include window cranks and handles, door trim, or window sills. If you don’t account for obstructions, your shutters may not be able to fit properly.

4. Not Using the Right Tools:

To ensure accurate measurements, it is important to use the right tools when measuring for window shutters. The best tool to use is a metal tape measure that will stay rigid and allow you to take precise measurements of each window. Other tools, such as a carpenter’s level or ruler, can also be helpful in ensuring accurate measurements.

5. Not Accounting for Mounting Holes:

When measuring for shutters, it is important to account for any mounting holes that will need to be drilled into the window frame or wall. If you don’t account for the size of these holes, your shutters may not be able to fit properly. It is also important to note that some shutters require more mounting points than others, so it is important to measure and mark each location before installation.

it is important to account for any mounting holes

By avoiding these common mistakes, you can ensure that your window shutters will fit perfectly and provide the look and function you desire. With proper measuring, your shutters will be able to provide years of beauty and enjoyment for your home.

Frequently Asked Questions

What Tools Do I Need to Accurately Measure Window Shutters? 

To get the most accurate measurements for your window shutters, it’s best to use a steel measuring tape and a level. The steel measuring tape should have at least one inch of markings. It’s important that you measure from outside edge to outside edge, as this will give you the most accurate measurements. Additionally, it’s a good idea to use a level to make sure that the top of your window is even and straight.

Do I Need to Measure Both Inside and Outside Dimensions? 

Yes, it’s important to measure both the inside and outside dimensions of your windows, as this will allow you to accurately determine the size of your shutters. Be sure to measure from the inside edge of the window frame on each side, and then add the appropriate sill depth for outside measurements.

What Happens if My Measurements Are Not Perfectly Level? 

If your measurements are slightly off-level or uneven, don’t worry. You can still get accurate measurements for your shutters, but you may need to make slight adjustments when installing them. This is why it’s important to use a level when measuring shutters. With the right tools and careful attention to detail, you’ll be able to get the perfect fit!

Do I Need to Measure Every Window in My Home? 

It’s important to measure every window that you plan to put shutters on, as each window may have different dimensions. It’s best to measure multiple times just to be sure that you get the correct measurements for all of your windows. Additionally, if you are replacing existing shutters it is important that you measure the existing shutters before ordering new ones. This way, you can be sure that the new shutters will fit properly in your windows.

It's Important to 
Measure Every Window


By now, you’ve learned the steps on how to measure for window shutters and make sure you get the best fit for your window. With this newfound knowledge in hand, selecting the right shutter will be easier as you go shopping and decide what look and style is best suited for your home.

In conclusion, it is important to remember that accurate measurements are key to finding the perfect window shutters that will bring a warm yet stylish touch to any room. Taking the time now will mean fewer hassles later when you are buying shutters and/or having them fitted. It will also help guarantee that everything goes perfectly from start to finish and that you love your new shutters for many years to come!

Angela Ervin

Angela Ervin

Angela is the executive editor of DIY quickly. She began her career as an interior designer before applying her strategic and creative passion to lifestyle and home. She has close to 15 years of experience in creative writing and online content strategy for housekeeping, home decorations as well as other niche efforts. She loves her job and has the privilege of working with an extraordinary team. She lives with her husband, two sons, and daughter in Petersburg. When she's not busy working she spent time with her family.

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