Shiplap Calculator
Estimate shiplap boards, installed courses, linear stock, fasteners, package quantities and material cost after opening deductions.
Default project preview
28 boards
Net wall area
135 ft²
Installed courses
18
Base linear stock
294.5 ft
Fasteners
224
Calculator
Build the material order
Your order will appear here
Enter the project details and calculate a rounded material estimate.
Methodology
Transparent calculation
BuildMeter converts every input to a consistent internal unit, applies the selected allowance, and rounds products up to whole purchasable units.
Linear stock = net wall area ÷ installed board face width. Waste is applied before dividing by stock length and rounding boards up.
FAQ
Shiplap Calculator questions
Why use installed face width instead of nominal board width?+
Overlaps and profiles reduce the visible coverage of each course, so installed face width is the relevant dimension.
Should openings always be deducted?+
Large openings can be deducted, but offcuts around them may not be reusable.
Does this include corner and edge trim?+
No. Measure trim profiles separately based on the room layout.