Blind Size Calculator
Calculate the correct measurements for inside-mount or outside-mount window blinds to ensure a perfect fit.
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How to Use the Blind Size Calculator
A comprehensive guide to measuring your windows for perfectly fitting blinds.
Measuring for new window blinds can be intimidating. A small error can result in blinds that don't fit, leading to frustration and wasted money. This Blind Size Calculator simplifies the process by providing the precise "order size" you need based on your window measurements and chosen mount type (Inside or Outside). It takes the guesswork out of the equation, ensuring a professional-looking fit every time.
Understanding the Calculation Logic
The way the order size is calculated depends entirely on whether you choose an inside mount or an outside mount. The logic for each is different to ensure a proper fit and function.
Inside Mount Calculation
For an inside mount, the blinds sit entirely within the window frame. This provides a clean, minimalist look. Accuracy is key here.
Order Width = Your Measured Window Width - 1/4 inch
Order Height = Your Measured Window Height
The calculator automatically makes a small deduction (typically 1/4 to 1/2 inch) from the width you provide. This is a standard industry practice to ensure the blind's headrail and hardware have enough clearance to operate smoothly without scraping the sides of the window frame. The height you provide is the height that will be ordered, as there's no need for a deduction.
Outside Mount Calculation
For an outside mount, the blinds are installed on the wall or trim outside the window frame. This is a great option for hiding imperfect window frames or for blocking more light.
Order Width = Your Measured Window Width + 4 inches
Order Height = Your Measured Window Height + 4 inches
The calculator adds extra width and height to your measurements. This "overlap" (typically 2 inches on each side, top, and bottom) is crucial for providing adequate light blockage and ensuring privacy. The extra coverage hides the window frame and prevents light from seeping in around the edges.
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