Question: How to Measure for Window Shades?
Answer: Measure the width and height of your window in three spots, use the smallest width and correct height, and decide inside or outside mount for a perfect fit.
Tools You Need Before You Measure
Before you start measuring for window shades or blinds, gather the right tools. Accurate tools help you avoid costly mistakes.
Metal tape measure – A rigid tape gives precise measurements. Avoid cloth tapes, which can stretch.
Pencil and paper – Write down each measurement clearly. Don’t rely on memory.
Ladder or step stool – Helps you safely reach tall or high windows.
Level – Checks if the window frame is straight, which affects fit and operation.
A few extra minutes with the right tools can save you time and money later.
Window Mount Types Explained
Choosing the right mount style affects both how your window treatments look and how well they work.
Inside mount
Installed within the window frame for a clean, built-in look. Best for deep frames and modern styles, but requires precise measuring.Outside mount
Installed above or around the window opening. It offers better light control and privacy, and works well for shallow or uneven frames.
Knowing your mount type first makes measuring much easier and more accurate.
Step-by-Step: Measuring for Inside Mount Blinds & Shades
Inside mounts give a clean, built-in look, but they need precise measuring.
Measure the width
Measure inside the frame at the top, middle, and bottom. Write down all three and use the smallest width to ensure a proper fit.Measure the height
Measure from the top of the frame to the sill on the left, center, and right. Use the longest height so the blind fully covers the window.Check frame depth
Measure the depth of the window frame to make sure it’s deep enough for your chosen blind or shade.
Step-by-Step: Measuring for Outside Mount
Outside mounts offer more coverage and better light control.
Measure the total width
Measure the area you want to cover, then add extra width on both sides to reduce light gaps.Measure the height
Measure from the top of the desired headrail position down to where you want the blind or shade to end.Allow for overlap
Add a few extra inches to improve privacy and block light more effectively.
Taking careful measurements now helps your blinds fit better and look more polished.
Bay, Specialty & Irregular Window Measuring Tips
Bay and specialty windows need extra care because they’re rarely straight or standard.
Measure each section separately
Bay windows often need multiple blinds or shades. Measure every window on its own—don’t assume they’re the same size.Check angles and depth
Angled bays and corner windows may need special brackets. Measure frame depth and note any angles that affect mounting.Use templates for irregular shapes
For arches, circles, or trapezoids, make a paper or cardboard template to capture the exact shape.Plan for overlap and clearance
Make sure blinds won’t hit handles, trim, or nearby walls when opened.
Careful measuring helps specialty windows look custom, not awkward.
Common Measuring Mistakes to Avoid
Small measuring mistakes can lead to blinds that don’t fit or work properly. Watch out for these common issues:
Not measuring multiple points
Window frames aren’t always square. Always measure width and height in at least three places to get accurate results.Confusing width and height
Width is always measured left to right, and height is top to bottom. Mixing them up is a frequent ordering error.Forgetting depth and product specs
Inside mounts need enough frame depth. Always check the depth requirements for your specific blind or shade before ordering.
A careful double-check can save time, money, and frustration.
Need help measuring your windows?
If you want perfect-fitting shades or blinds without the stress, we’re here to help. Our team can guide you through measuring, recommend the right mount style, and make sure your order fits the first time.
Contact us today for expert advice, measuring support, or a personalized solution for your windows.
FAQs
How to measure windows for shades and blinds?
Measure the inside of the window frame in three places for width (top, middle, bottom) and height (left, center, right). For inside mounts, use the smallest width and largest height. For outside mounts, measure the full area you want covered and add a little extra for better light control.
What are common window measurement mistakes?
Common mistakes include using the wrong tools (like cloth tape), not measuring multiple points, rounding measurements, and forgetting to check frame depth or obstructions.
What size blinds do I need if my window is 35 inches wide?
For a 35-inch window with an inside mount, use your exact measured width (e.g., 35 inches) as the blind size. For outside mounts, add a few inches on each side for better coverage.
