Enter your Wall Length, Wall Height, and any Window dimensions to subtract, then set your Board Length, Board Face Width, Waste Factor, and Price per Square Foot — the Shiplap Calculator figures out exactly how many boards you need, plus your total linear footage and project cost.
Boards Needed
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Wall Area
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Linear Feet Required
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Total Cost
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Shiplap is a type of wooden board with overlapping joints created by rabbeted edges. It's popular for interior walls because it creates a rustic, farmhouse aesthetic while providing a durable, gap-free surface.
Calculate your wall area (length × height), subtract any windows or doors, then divide by the coverage area of your boards. Add 10-15% waste factor for cuts and mistakes.
Common shiplap widths are 4", 6", and 8". Wider boards (6-8") create fewer seams and work well in larger rooms, while narrower boards (4-5") suit smaller spaces and create more visual lines.
The waste factor accounts for cuts around windows, doors, outlets, and mistakes during installation. A 10-15% waste factor is typical for shiplap projects.
Yes, shiplap can be installed vertically for a different aesthetic effect. Vertical installation can make ceilings appear higher and works well as an accent wall feature.
Shiplap costs vary widely from $2-8 per square foot depending on wood type and quality. Pine is most affordable, while cedar and reclaimed wood cost more but offer better durability and appearance.
Basic tools include a miter saw, level, stud finder, nail gun or hammer, and measuring tape. A table saw helps if you need to rip boards to custom widths.