How to Measure a Window for Blinds: The Complete Guide

Welcoming the Reader

Hello there, friends! Are you planning to buy some blinds for your windows? Well, one of the crucial steps in installing blinds is to measure the window correctly. Many people make the mistake of measuring windows inaccurately, which results in having blinds that do not fit the window correctly. Measuring the windows for blinds is not as intricate as it may seem. In this article, we will discuss the twelve steps required to measure a window correctly for blinds. But before we proceed to the steps, let’s first get to know some basics.

Understanding Your Windows

To measure windows for blinds, having an understanding of the windows is essential. Windows can be molded in different shapes and sizes, and each of these shapes has different methods of measurements. Some of the common window types include rectangular, round, arched, and triangular windows.

Now that we have identified the basics let’s dive into the twelve essential steps for measuring a window for your next set of blinds.


1. Decide the Type of Blind:

The first step is to determine the type of blinds that you want to install. Blinds come in various styles like venetian blinds, roller blinds, etc., thus measuring a window for each style requires different techniques.

2. Measuring the Width:

Using a metallic measuring tape, measure the width of the window. Measure across the top, middle, and bottom of the window and record the smallest measurement of the three. A properly fitted blind should be slightly smaller than the window frame.

3. Measuring the Height:

Next, measure the height of the window. Measure from the top of the inside of the window frame to the window sill. Again, measure from three places – left, middle, and right. Record the smallest measurement of the three.

4. Measuring for Inside Fit:

If you want to install the blind inside your window, then measure the window’s depth or recess. It tells you how deep the window is. Measure from the inner edge of the window to the outer edge.

5. Estimating the Size:

After recording all the measurements, estimate the size of the blind based on the smallest measurement. Usually, blinds are ordered in increments of 0.5cm.

6. Side Mounting the Brackets:

Attach the brackets for the blinds to the window’s sides using screws. The brackets should be properly aligned, secured, and leveled.

7. Adding an Extension Bracket:

If the window sill is protruding, then use an extension bracket. These brackets come with the blinds allowing you to attach them to the windowsill.

8. Mount the Head Rail:

Slip the head rail of the blinds into the bracket. The bracket will lock the head rail in place. Make sure it is securely fit to avoid any misalignment.

9. Attach the Wand/Controls:

Slide the wand or cord through the hole provided and attach them to the rail. Make sure that it also clicks into place.

10. Test the Movements:

Test the blind’s movement by opening and closing it a few times. Ensure that the operation is smooth and the blind hangs straight.

11. Shorten the Cord:

If your blinds are corded, shorten the cords to the right length, taking care that they hang at the right height above the floor.

12. Congratulations, You’re Done:

After completing the installation, give your blinds a final touch-up, and voila! You have given your window an entirely new look with your personalized blinds.

Tips and Tricks

1. Take Accurate Measurements:

Make sure your measurements take into account the frame’s depth, sill protrusion, and other curveballs that may make your blind fitting challenging.

2. Don’t Measure By Yourself:

Many people make measuring errors because they do it independently, and not many window frames are perfectly square or levelled.

3. Double Check:

Before placing your order, double-check that the measurements provided are correct to avoid any misfits.

4. Take the Time to Level the Brackets:

Uneven blinds look wonky and unprofessional. Taking the time to level them will add extra precision to the installation.

5. Choose the Right Style:

Different blind styles suit differently shaped windows. Before buying blinds, know your window type and match it with the right style.

6. Measure Two or Three Times:

Measure your window two or three times before making your order to ensure that the measurement is accurate as you trust.

7. Follow the Manufacturer’s Guidelines:

Every kind of blind has its own instructions. So always follow the instructions to put up your blinds.

8. Take Care of your Measuring Tape:

Store your measuring tape correctly and keep it free from moisture, rust, and other damage.

9. Always use a Metal Tape Measure:

Using a metal tape measure is the most accurate and best tool to use when measuring.

10. Keep You and Your Window Safe:

Windows can be quite hard to reach, so always take suitable safety precautions when installing your blinds.

These are the twelve necessary steps to measure your windows accurately. Remember, taking accurate measurements is crucial, or you could be left with the wrong-sized blinds. By reading this article, we hope that you have gained invaluable insights and tips on measuring your windows for blinds accurately. So, what are you waiting for? Measure your windows correctly and install your perfect set of blinds today!

Advantages and Disadvantages: How to Measure a Window for Blinds


1. Accurate measurements: Measuring your windows properly ensures that your blinds will fit perfectly.

2. Customized fit: Measuring your windows for blinds allows you to have them custom fit to your specific preferences and needs.

3. Saves money: By measuring accurately, you can avoid costly mistakes that could result in having to purchase new blinds or have them adjusted.

4. Enhances décor: Proper measuring ensures that your blinds will compliment your window treatments and overall décor.

5. Improves energy efficiency: Accurate measurements ensure proper fitting, which improves energy efficiency and can save on heating and cooling costs.

6. Easier installation: When you have the correct measurements, installation is much easier and quicker.

7. Variety of options: Measuring your windows allows you to choose from a variety of blinds options that fit your window size and shape.

8. Professional look: Properly fitting blinds provide a more polished and professional look to your home or office.

9. Increases privacy: By measuring accurately, you can ensure that your blinds provide optimal privacy and light control, meeting your specific needs.

10. Prevents damage: Accurate measuring helps to prevent damage to your blinds during installation and use.


1. Time-consuming: Measuring windows for blinds can be a time-consuming process, especially if you have many windows to measure.

2. Requires accuracy: Precise measuring is crucial, and mistakes could result in blinds that do not fit properly or function correctly.

3. Can be complicated: Measuring for blinds can be complicated, especially with odd-shaped or angled windows.

4. Additional cost: Some companies may charge for measuring, adding to the overall cost of purchasing and installing blinds.

5. Inconvenient: If you do not have the necessary tools or experience, measuring for blinds can be inconvenient and frustrating.

6. May need professional assistance: Measuring difficult windows may require professional assistance, adding to the overall cost.

7. Mistakes can be costly: If measurements are incorrect, it can be costly to correct the mistake or replace the blinds entirely.

8. Limited options: Depending on the size and shape of your windows, you may be limited in your options for blind styles.

9. Delays installation: An incorrect measurement can delay the installation of your blinds, causing inconvenience and frustration.

10. Safety concerns: If blinds do not fit properly, they can create safety hazards, especially for young children and pets.


1. How do I measure for blinds?

Measure the width at the top, middle, and bottom of the window. Measure the height at the left, right, and center of the window. Use the smallest width and height measurement to order your blinds.

2. What tools do I need to measure for blinds?

You will need a steel measuring tape, pencil, scrap paper, and a step stool (if necessary) to reach high windows.

3. Should I measure for inside or outside mount?

This depends on your style and preference. Inside mounts create a cleaner, seamless look whereas outside mounts give the illusion of a larger window. Be sure to measure according to the type of mount you choose.

4. How much should I add to the measurements?

When measuring for inside mounts, do not add any extra measurement to the width or height. For outside mounts, add 2-3 inches to the width and height for proper coverage.

5. What if my window is not a perfect square or rectangle?

For irregularly shaped windows, measure the widest point and tallest point and use those measurements to order your blinds.

6. Can I measure for different types of blinds the same way?

Yes, the measuring process is typically the same for all types of blinds.

7. How accurate do my measurements need to be?

Measure as accurately as possible to ensure the best fit for your blinds.

8. What if I am uncertain of the measurements?

It is always best to double-check your measurements or have a professional take them for you to avoid complications.

9. Can I order custom-sized blinds?

Yes, most blinds can be ordered in custom sizes to perfectly fit your window.

10. How long does it take to receive my blinds?

This varies depending on the company and type of blinds. Typically, it takes 1-2 weeks for standard blinds and up to 4 weeks for custom blinds.

11. What should I do if the blinds do not fit?

Contact the company immediately to discuss your options for returns or exchanges.

12. Are there any maintenance tips for keeping my blinds in good condition?

Regularly clean your blinds with a soft cloth or brush, vacuum them, and avoid using harsh chemicals or abrasive materials.

13. How long do blinds typically last?

The lifespan of blinds varies depending on the quality and how well they are maintained. On average, they can last 5-7 years.

How to Measure a Window for Blinds

When it comes to decorating your home and adding privacy to your windows, blinds are a great option. However, before you can purchase blinds for your window, it’s important to get an accurate measurement to ensure a perfect fit. Here are some steps to follow when measuring your window for blinds:

Step 1: Determine Inside or Outside Mount

The first thing you need to determine is whether you want an inside or outside mount for your blinds. An inside mount means that the blinds will fit inside the window frame, while an outside mount means that the blinds will hang outside the frame. Measure accordingly based on the type of mount you choose.

Step 2: Measure the Width

Next, measure the width of your window. For an inside mount, measure the width of the inside of the window frame at the top, middle, and bottom. Take the smallest measurement and round down to the nearest 1/8 inch. For an outside mount, add 2 to 4 inches to the width of the window frame on each side, depending on how much coverage you want.

Step 3: Measure the Height

After measuring the width, it’s time to measure the height. For an inside mount, measure the height of the inside of the window frame from the top to the bottom in three places: on the left, in the middle, and on the right. Take the smallest measurement and round down to the nearest 1/8 inch. For an outside mount, add 2 to 4 inches to the height of the window frame, depending on how much coverage you want.

Step 4: Double Check Your Measurements

Before you order or purchase your blinds, double-check your measurements to make sure they are accurate. Measure again if necessary to avoid any mistakes and ensure that your blinds will fit properly.


Measuring your window for blinds may seem like a difficult task, but it’s actually quite simple. Be sure to determine whether you want an inside or outside mount, measure the width and height accurately, and double-check your measurements before ordering or purchasing your blinds.


We hope this article has helped you understand how to measure your windows for blinds. Remember to take your time and measure carefully to ensure a perfect fit. Good luck with your window decorating project, and we’ll see you next time!