back iconBack to all photos

How to Measure a Window for Blinds: Quick & Easy Guide

| September 16, 2024

Are those hot midday sun rays starting to bother you? Or maybe you’re planning for the winter? You may have also not been sleeping well lately… Either way, if you’re here, you want to install blinds, right? And, naturally, you’re wondering how to measure a window for blinds, because that’s the first essential step. Well, we’re here to help! You’ll learn how to take accurate measurements for both inside and outside mount blinds. And we’ve even included a secret tip (you’ll have to keep reading to discover it!)

Key Takeaways

  • Gather a steel tape measure, pencil, notepad, and ladder for accurate window measurements for blinds.
  • Decide if you want to install inside or outside mount blinds based on window dimensions and desired aesthetics.
  • Inside mounted blinds fit within the window frame. Outside mount blinds are installed over the window frame. You’ll have to measure the width and the height at three different points.
  • Measure all windows, even though they appear identical, and double-check all measurements.

Deciding Between Inside and Outside Mount

If you’re looking for tips for measuring a window for blinds, you’ve probably already decided if you want your blinds on the inside or outside, so we won’t get into too many details about this. What we will say, though, is that there’s a major difference between them.

Inside mount window coverings are installed within the window frame, while outside ones are installed over the window frame.

If you haven’t decided yet where to install the blinds, here are some tips:

  • If the casing depth is less than 2 inches, you’ll probably have to install the blinds on the outside.
  • If your window isn’t square, it will be easier for you to install blinds on the outside.
  • You can pick literally any outside mount blinds. Unlike interior blinds, they don’t have to fit perfectly within the window frame.
  • If your windows are trimmed out and you don’t want to hide the trim, install the blinds inside because outside window blinds will cover the window trim.

Tips for Accurate Window Measurements for Blinds

Here are some tips that will help you while measuring your windows for blinds:

  • Use a steel measuring tape – it’s easier to use, and the results will be more accurate.
  • Don’t skip any windows, especially if you’re measuring for inside mount blinds. Even if you think the windows are identical, they probably aren’t.
  • If the measurement is close to the 1/16″ mark, just round it to the nearest 1/8″.
  • Measure each window twice to ensure that the results are accurate.
  • Don’t order new blinds based on the size of your old blinds.
  • When you measure for outside window blinds, don’t forget that they’ll be installed over the window frame. You’ll have to add 2-4 inches for each side, especially if there’s no window trim.
  • If you’re ordering roller shades, remember that the fabric is narrower than the total shade width, so add a few inches to ensure it covers the whole window.

Now that we’ve equipped ourselves with everything we need to measure a window for blinds, let’s get down to business!

How to Measure for Inside Mount Blinds

Here’s how to measure a window for inside mount blinds:

  • First, you should measure the depth of the window because it should meet the minimum depth requirement for inside mounts – usually 2 inches (you can find this in the Mounting Requirements section for the blinds you’ve chosen).
  • Take measurements at three points for the width: the top, middle, and bottom of the window opening.
  • Use the narrowest width measurement.
  • If you’re installing vertical blinds or roller shades, it’s enough to measure the width only at the top.
  • For the height, measure from the highest point of the window frame to the bottom at three points: the left, center, and right.
  • Use the longest measurement from these three points.
  • Measure the window diagonally by running the tape from one corner to the opposite corner.
  • If the two diagonal dimensions differ too much, it may be difficult to install inside mount blinds.

How to Measure for Outside Mount Blinds

Measuring for outside mount blinds is slightly different than measuring for interior blinds. Here, you need to measure the entire window, including the surrounding frame or window molding.

Here’s how to measure for outside mount blinds:

  • If you have window trim 0 include it in your width measurements. If there’s no trim – add 2-4 inches to each side. This will allow the blinds to block more light.
  • To take the mount width measure, run the tape measure at the top, middle, and bottom.
  • Use the widest measurement.
  • If you want to install vertical blinds, you only need to measure the width at the top.
  • Before measuring the height, make sure there are at least 2 inches of flat space above the window for the mounting bracket or headrail.
  • If you have a protruding window sill, measure from the sill to the top of the window. Go 2-3 inches beyond the top of the window for the mounting hardware.
  • If you don’t have a protruding window sill, start measuring 2 inches below the sill and up to 2-3 inches beyond the top of the window.
  • Use the longest measurement for the height.
  • Are there any obstructions that will prevent your blinds from functioning properly? (You can install extension brackets for the blinds to avoid these obstructions.)

Types of Window Blinds and Shades

Still unsure which blinds will be the best match for your home design? We’re here to help! Keep reading to discover some design tips and tricks about Canada’s most sought-after blinds and shades.

Magic’s Thermal Blinds and Solar Shades (the Secret Tip!)

Magic’s thermal blinds and solar shades feature our Slide ‘N’ Hide technology. This means that the blinds and shades are fully hidden within the window frame when not in use. There’s no need to match them to any design because it’s like they’re not even there!

When they’re open, the thermal blinds cover the entire window opening, ensuring complete privacy, UV protection, soundproofing, and increased energy efficiency.

Our solar window shades do not offer complete privacy because their material allows natural light in. Still, they eliminate glare and block UV rays. The fact that they’re fully retractable allows you to enjoy the warmth of the sun in the winter and keep your house cool in the summer.

Furthermore, our thermal blinds are covered by our industry-leading 40-year warranty.

Have we already mentioned that our customers are incredibly happy with our advanced blind technology? In fact, this is one of the Magic features they’re the most satisfied with! Book a free consultation to learn about other features that make our windows stand out in this industry!

Horizontal Blinds

There are various types of horizontal blinds you can choose from based on your home design, including:

  • Wooden blinds
  • Faux wood blinds
  • Metal blinds (an excellent choice for outside mounts)

Before installing horizontal blinds, make sure to check how much maintenance they require and whether they have any disadvantages. For example, wooden horizontal blinds probably aren’t the best for bathrooms and kitchens because they’re prone to mold and rot. Instead, you can install faux wood blinds in these rooms, which are resistant to high humidity.

Vertical Blinds

Vertical blinds are best for large windows and doors. They have multiple slats running from top to bottom, which can be angled based on how much light and privacy you need.

On the other hand, if you’re looking for the best blinds for privacy, vertical ones may not be your choice. There are usually gaps between the blinds and the wall that can compromise your privacy.

Roman Shades

Roman shades are made of fabric. They roll up and down through a cord system. When raised, the fabric forms neat horizontal folds. In recent years, Roman shades have become extremely sought-after among homeowners mostly thanks to their high customizability and affordability.

However, Roman shades won’t last as long as other types of window coverings. In addition, you’ll likely spend more time cleaning and maintaining them since they’re made of fabric.

Roller Shades

Roller shades are window treatments made of a flat piece of fabric that rolls up and down. They’re quite practical and affordable. Since they’re highly customizable, roller shades are excellent for any home design! In addition, roller shades are perfect for light control; some also block UV rays.

Nonetheless, roller shades aren’t the best option for complete privacy since they’re made of light-filtering fabrics.

Summary

Ultimately, measuring windows for blinds isn’t as difficult as it seems at first thought, right? The secret is to measure at different points, avoid skipping any windows (even if they appear identical), and ensure that you’re writing everything down with utmost accuracy. Don’t forget to double-check your measurements!

If you want to discover more about the features of Magic blinds, windows, or doors, don’t hesitate to book a free consultation with us!

Frequently Asked Questions

What is the best way to measure a window for blinds?

If you want to install inside mounted blinds, you’ll have to measure the depth of the window, which needs to be at least 2 inches. Then, measure the width at three points, writing down the narrowest measurement. Measure the height in three points, writing down the longest measurement.

How to measure windows for outside mount blinds?

To measure the window for outside mount blinds, check if there’s enough flat surface above the window for the mounting hardware. If you have window trim, include it in the measurements. If there’s no window trim, add a few inches to each side when you measure the width. If you have a protruding window sill, measure from the sill up to 2-4 inches beyond the top of the window.

How do I decide between inside and outside mount blinds?

To decide between inside and outside mounted blinds, consider that inside mount blinds offer a clean, streamlined appearance within the window frame. In contrast, outside mount blinds provide better light control and can create the illusion of larger windows.

Why is it important to measure at different points for inside mount blinds?

Measuring at different points for inside mounted blinds is crucial to prevent any gaps and ensure proper blind functionality.

How much extra space should I add for outside mount blinds?

When you measure for outside mount blinds, it’s best to add at least 2 inches on each side of the window, especially if you have no window trim.

READY TO TRANSFORM YOUR HOME?

The project of your dreams is just a few clicks away. Book your free no obligation consultation with us:

Want free window information?

Simply enter your information below and we'll send it right to your inbox.
SEND ME THE FREE INFO >
Give it a try, you can unsubscribe anytime.