Measuring for blinds might seem pretty straightforward: grab a tape measure, measure from top to bottom, side to side, jot down the numbers, and you’re done. If only. In reality, accurate blind measurements are one of the most important steps in getting window treatments that look right, function smoothly, and last for years.
While DIY measuring can work in some cases, even small errors can lead to blinds that don’t fit, don’t operate properly, or simply don’t look finished. At Best Blinds & Awnings, we’ve seen everything when it comes to windows, and know they can come in all dimensions and configurations. Here’s a practical overview of how windows are measured for blinds and why professional measurement often makes the biggest difference between “Meh” and “Marvelous!” when your blinds are finally installed.
Inside Mount vs. Outside Mount: Know the Difference
Before measuring (and ordering!), you need to decide how the blinds will be mounted.
Inside mount blinds fit inside the window frame for a clean, built-in look. Outside mount blinds are installed above or outside the window frame and cover a larger area. Not only does the type of mount affect light control, privacy, and appearance, but each option requires a different measuring approach.
How to Measure for Inside Mount Blinds
Inside mounts require precision. Even slightly uneven window frames can affect fit. You’ll need to measure:
- Width at the top, middle, and bottom of the window opening
- Height at the left, center, and right sides
- Depth of the window frame to ensure it can accommodate the blind
The smallest width measurement is typically used to ensure the blind fits inside the opening. This is where many DIY measurements go wrong, especially in older homes where windows aren’t perfectly square and the house may have settled.
How to Measure for Outside Mount Blinds
Outside mount blinds are more forgiving in terms of dimension, but still require planning if you want them to look polished. You’ll need to determine:
- How much overlap you want on each side of the window
- How high above the window the blind should be mounted
- How far below the window the blind should extend
People often choose outside mounts to:
- Block more light (such as in a theater room)
- Improve privacy (for windows facing the street)
- Cover shallow or uneven window frames where interior mount blinds won’t work well
Incorrect measurements for outside mount blinds can end up leaving light gaps or making the window look off-balance.
Common DIY Measuring Mistakes
Even careful homeowners can run into issues when measuring for blinds. Common mistakes include:
- Measuring each dimension in only one spot instead of at multiple points
- Rounding measurements up instead of down
- Ignoring window depth requirements
- Assuming all the windows in a room have identical measurements just because they look the same
- Not accounting for hardware or trim
These small errors can lead to blinds that don’t fit, rub the window jambs, or tilt, or don’t sit straight when closed. Even when homeowners get the measurements right, however, they may not know what adjustments to make when ordering or mounting blinds for windows that aren’t perfectly square or rectangular.
Why Professional Measurement Is Worth It
Professional measurement removes guesswork from the process. Experienced installers know what to look for and what problems to prevent before blinds are ever ordered. Professional measuring ensures:
- Precise sizing for each individual window
- Proper allowance for hardware and mounting style
- Correct recommendations for inside vs. outside mount
- Blinds that operate smoothly and look intentional
To get the right look, proper measurement is even more critical for:
- Large or specialty windows
- Bay or bow windows
- Motorized blinds
- Older homes with uneven frames
Protecting Your Investment with Custom Measurements from Best Blinds & Awnings
While measuring for blinds may seem simple, precision matters. Accurate measurements affect how your blinds look and how well they function. It may not seem like a big deal, but when your blinds are crooked or expose gaps, it can be a disappointment that wears on you day after day.
When you work with Best Blinds & Awnings, we provide free professional measurements, expert recommendations, and custom-fit window treatments for homes and businesses across all our service areas in the Inland Northwest. We will make sure you order the right type of blinds for your windows and needs, and that your blinds will fit even in imperfect window openings. Professional measurement helps:
- Avoid costly reorders
- Protect manufacturer warranties
- Ensure proper installation and operation
- Deliver a polished, finished look
Accurate measurement makes a big difference in the final result.
Blinds are a long-term investment in your home’s comfort and appearance. When you are ready to upgrade your home’s window treatments for a fresh, new look, contact Best Blinds & Awnings to schedule a free in-home consultation and professional measurement.