Board and Batten, Wainscoting and Shiplap Calculator
Estimate decorative wall coverage, board or batten linear feet, stock pieces, waste, and editable material cost.
How to use the wall paneling calculator
- Measure the actual project. Break irregular work into separate sections and record finished dimensions consistently.
- Enter the core measurements. The quick view focuses on project geometry; add or subtract sections where the calculator supports multiple areas.
- Review purchasing assumptions. Open Advanced inputs to replace example prices, waste, coverage, density, pack size, minimum order, or delivery assumptions with current project information.
- Calculate and verify. Review the formula, limitations, whole-unit rounding, product instructions, and supplier requirements before purchasing.
Key inputs covered: Wall system, Finished paneling height, Board effective face width, Batten spacing, Stock board length, Cut and layout allowance, Stock board example price, Backing/panel example price, Wall run length, Opening area within panel height, and additional project-specific assumptions.
Result coverage: The wall paneling calculator reports 6 separate quantities so the primary estimate and its supporting purchase or planning values can be checked together.
How the estimate works
Board-and-batten mode rounds each wall run to entered batten spacing; wainscot and shiplap divide net panel area by effective board face width, then stock lengths and waste round the order up.
A 12 ft wall with battens at 18 in on center has about nine vertical batten lines before openings and layout adjustment.
Assumptions, rounding, and limitations
Dimensions are treated as finished measurements. Only deductions and allowances entered above are included. Decimal measurements display to two places; purchase quantities round up when a whole container or piece is required.
- This planning model does not create a centered layout, balance end spaces, place stiles around openings, or optimize offcuts.
- Actual exposure differs from nominal board width because of laps, tongues, grooves, reveals, and manufacturer-required gaps.
- Confirm wall flatness, backing, fasteners, moisture movement, trim, electrical extensions, fire requirements, and exact product dimensions.
Sources and review
These references support unit conversions and selected planning assumptions. Product instructions and local requirements control the actual project.
Last reviewed: 2026-10-09
Editorial process
BuildPlanCalc publishes the formula, editable assumptions, limitations, and supporting references so the estimate can be checked rather than treated as a black box. See the calculation and review methodology, or report a correction.
Frequently asked questions
Are the results exact?
No. Results are planning estimates based on the dimensions and assumptions entered. Confirm product coverage, site conditions, and ordering rules with the supplier.