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Roller Blind Formula:
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The roller blind size calculation determines the appropriate width of a roller blind based on your window measurements and the required bracket allowance. Proper calculation ensures the blind fits perfectly and operates smoothly.
The calculator uses the simple formula:
Where:
Explanation: The bracket allowance ensures there's enough space on either side of the window for proper installation and operation of the roller blind mechanism.
Details: Accurate measurements are crucial for ensuring your roller blinds fit properly, operate smoothly, and provide complete coverage of your window. Incorrect measurements can lead to gaps that allow light in or blinds that don't roll up properly.
Tips: Measure your window width precisely in centimeters. Add the recommended bracket allowance (usually provided by your blind manufacturer or installer). All values must be positive numbers.
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 bracket allowance?
A: Most roller blinds require 5-10 cm total bracket allowance (2.5-5 cm on each side), but check your specific blind's requirements.
Q3: Should I measure inside or outside the window recess?
A: This depends on your installation type. For inside mounts, measure the recess width. For outside mounts, measure the area you want to cover plus allowance.
Q4: What if my window isn't perfectly square?
A: Use the narrowest width measurement and consider ordering blinds slightly wider to accommodate any irregularities.
Q5: Do I need to account for the blind mechanism?
A: The bracket allowance typically accounts for the mechanism, but verify with your specific product instructions.