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How do I space battens evenly across an opening?
Subtract combined panel width from the clear opening and divide the available width by one fewer than the panel count. Outer panels sit flush with the edges. An overfilled opening shows the additional width needed.
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Worked example
With the example inputs below, the calculator returns these results.
Clear gap between panels (mm) 125
- Clear opening width
- 1,400 mm
- Panels including both ends
- 5 panels
- Finished width per panel
- 180 mm
Other results
- Width over opening (mm)
- 0
- Combined panel width (mm)
- 900
Use your own figures
Check the clear gap between panels or find how far the chosen set overfills the opening. Open the worksheet, replace the example values, then copy or print the result.
Equal panel spacing →