Shiplap Board Calculator
Shiplap Boards
Calculate shiplap boards for a wall or ceiling
ft
ft
%
Formula
Boards = ceil((WallWidth × WallHeight × WasteFactor) / (BoardExposeWidth/12 × BoardLength))
Frequently Asked Questions
How do I calculate shiplap for a wall?
Measure the wall width and height to get total area. Divide by the coverage area of each board (exposed width times board length). Add 10% for waste from cuts and imperfections.
What is the most common shiplap size?
The most common shiplap board is a 1x6 (5.5 inches exposed width) in 8-foot lengths. For larger walls, 1x8 boards in longer lengths minimize seams.
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