Measuring a window for inside mount blinds is all about precision. To get the perfect fit, you’ll need to measure the exact width, height, and depth of the window frame using a metal tape measure. Inside mount blinds are installed within the window opening, so even small errors can lead to poor fit or functionality. In this guide, we’ll show you step-by-step how to measure your window for blinds inside the mount, ensuring a clean, custom look that fits beautifully and operates smoothly.
Why Proper Blind Measurements Matter for a Perfect Fit
When it comes to window treatments, looks and function go hand in hand. If your blinds don’t fit correctly, they may not close properly, hang unevenly, or allow unwanted sunlight to slip through. For inside mounts, even a fraction of an inch can make a big difference.
Measuring accurately ensures your blinds work smoothly, sit flush inside the frame, and give your windows that sleek, custom-finished appearance.
Inside vs Outside Mount: What’s the Difference?
Before we dive in, let’s talk about the two main types of blind installations:
- Inside Mount: Blinds are fitted inside the window frame. This creates a clean, modern look and allows for layering with curtains or drapes.
- Outside Mount: Blinds are installed outside the frame, covering the full window and sometimes beyond. This is often used for shallow windows or to block more light.
For this article, we’re focusing on the inside mount option, which is a favorite for its neat, built-in look.
Understanding Inside Mount Window Blinds
Inside mount blinds are measured to fit snugly within the window frame itself. They provide a polished, tailored appearance and are especially popular in kitchens, offices, and living rooms where space and style matter.
However, because they rely on the exact dimensions of your window opening, getting the measurements right is absolutely essential.
Tools You’ll Need to Measure Window for Blinds
Before you get started, make sure you have the right measuring tools:
- Metal tape measure (for accuracy)
- Pencil or pen
- Notepad or measuring worksheet
- Level (optional, for checking squareness)
Avoid using cloth or flexible tape measures—they can stretch or bend, which leads to inaccurate results.
Step-by-Step: How to Measure Window for Blinds Inside Mount
Let’s walk through how to measure for inside mount blinds the proper way. Here’s the process broken into three key parts:
1. Measure the Width
- Take measurements at three points: top, middle, and bottom of the window opening.
- Record the smallest measurement to ensure the blind fits inside.
- Round down to the nearest 1/8 inch.
2. Measure the Height
- Again, measure in three places: left, center, and right.
- Use the largest measurement to make sure the blind fully covers the height.
3. Measure the Depth
- This tells you how much space is available inside the frame to hold the blind.
- Some blinds require a minimum depth to be mounted flush.
- If your window is shallow, you may need a different style or a slight projection.
Write each measurement down carefully and double-check before you order.
How to Measure for Inside Mount Blinds the Right Way
The key to great results? Consistency and precision. Here are some expert tips from our team:
- Always measure in inches, and to the nearest 1/8 inch.
- Do not make your own deductions for clearance—the manufacturer will do this.
- Don’t assume all windows are the same size—even if they look alike.
- If your window is not perfectly square, go with the inside mount only if the variation is minimal.
Taking a few extra minutes now will save you time, money, and frustration later.
Measuring for Inside Mount Blinds with Limited Window Depth
Not all windows are deep enough for standard inside mount blinds. This is where knowing your inside mount blinds depth comes in.
What you need to know:
- Most standard blinds need at least 1.5 to 2 inches of depth.
- For a flush mount (where the blind sits flat with the wall), 3 inches or more may be required.
- If your window is too shallow, consider partially recessed or outside mount options.
For very shallow windows, look for specialty blinds made for minimal depth.
What Size Blinds for a 35-Inch Window?
If your window measures exactly 35 inches wide, your inside mount blinds should match that exact width (rounded down slightly). For example, if the opening is 35″, you’d order 34 7/8″ width to allow for proper clearance inside the frame.
Pro Tip:
Let the blind manufacturer make deductions. Just give them your true window opening size, not your adjusted numbers.
Special Tips for Measuring Roller Blinds Inside Mount
Measuring roller blinds is slightly different because the fabric is narrower than the mounting hardware. If you’re ordering inside mount roller shades, keep these things in mind:
- Provide exact inside frame width and height.
- The fabric will be about 1 to 1.25 inches narrower than the total width.
- If full coverage is important, consider a light gap solution or outside mount.
Always check product specs or consult with a professional for roller blind measurements.
Local Tips from Made In The Shade Space City – Pearland, TX
At Made In The Shade Space City, we’ve helped hundreds of homeowners in Pearland, TX find the perfect window coverings—and it always starts with proper measuring.
We understand the unique architecture and window styles common in this area, from new builds to traditional Southern homes. Whether you’re working with wide living room windows or narrow bathroom frames, we bring expert knowledge and local care to every job.
Need help? Our team offers free in-home consultations with professional measuring, so you don’t have to worry about getting it wrong.
Final Checklist: Common Measuring Mistakes to Avoid
Before you finalize your order or installation, run through this checklist:
- Did you measure in 3 spots (width and height)?
- Did you record the smallest width and tallest height?
- Did you double-check the window depth?
- Did you avoid making your own deductions?
- Are your windows square enough for an inside mount?
Taking a moment to double-check can make all the difference in getting the perfect fit.
Conclusion: Get the Perfect Fit with Expert Measuring
Learning how to measure windows for blinds inside a mount isn’t difficult—but it does require attention to detail. The steps are simple, and with the right tools and patience, you can confidently order or install your blinds knowing they’ll fit just right.
And if you’d rather leave it to the pros, the team at Made In The Shade Space City is just a call away. Serving Pearland, TX and surrounding areas, we specialize in custom blinds, shades, and shutters—with precise, professional measuring and installation to match.
