Window Blind Size Formula:
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The Window Blind Size calculation determines the appropriate width of blinds needed to properly cover a window, accounting for necessary overlap to ensure complete coverage and light blockage.
The calculator uses the simple formula:
Where:
Explanation: The overlap ensures the blinds fully cover the window opening and account for mounting hardware and proper light control.
Details: Correct blind sizing is crucial for proper installation, complete light control, privacy, and aesthetic appearance. Too small blinds will leave gaps, while too large may not fit properly.
Tips: Measure your window width precisely in inches. Standard overlap is typically 1-2 inches per side (total overlap of 2-4 inches), but check your specific blind requirements.
Q1: How do I measure my window width accurately?
A: Use a metal tape measure for precision. Measure at the top, middle, and bottom of the window and use the smallest measurement.
Q2: What's the typical overlap needed?
A: Most blinds require 1-2 inches per side (2-4 inches total), but this varies by blind type and manufacturer.
Q3: Should I measure inside or outside the window frame?
A: This depends on whether you're doing an inside or outside mount. This calculator assumes outside mount measurements.
Q4: Do all blind types use the same overlap?
A: No, roller blinds may need less overlap than Venetian blinds. Always check manufacturer recommendations.
Q5: What if my blinds need to be ordered in specific size increments?
A: Round up to the nearest available size after calculating your needed width.