Calculate the amount of shiplap or tongue-and-groove boards needed for walls and ceilings.
Project Dimensions
Material Estimate
Enter dimensions to calculate material needs
About this calculator
Overview
Shiplap is a type of wooden board commonly used as exterior siding or interior wall paneling. Because boards overlap or interlock, the 'exposed' width is less than the total board width.
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Pro Tips
Account for windows and doors by subtracting their area from the total wall area.
Check if your boards are 8ft, 10ft, or 12ft long before ordering.
For interior projects, let the wood acclimate to your home's humidity for 48 hours before installation.
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Fun Facts
"True shiplap has a 'rabbet' (groove) cut into the edges that allows the boards to overlap snugly."
"Nickel-gap shiplap is designed with a small 1/8 inch gap between boards for a modern look."
"When installing horizontally, always start from the bottom and work your way up."
