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Board and Batten Spacing Calculator
Even board-and-batten spacing depends on the clear wall width left after subtracting every batten. Decide whether the layout starts and ends with a batten or a space before calculating. Small differences compound across a wide wall, so mark the batten edges from one reference point instead of stepping along with a spacer.
Planning estimate only. Check measurements and real-world constraints before buying materials or making a commitment.
Calculate your scenario
Change any input. Results update immediately.
Your results
Clear space between battens
15.188 in
Measure between finished batten edges.
On-centre spacing
17.688 in
Useful for repeated layout marks.
Usable layout width
144.00 in
Wall width after reserved trim.
How the calculation works
The calculator applies this relationship to the inputs above. Keep every measurement in the unit shown.
Worked example
Use this example to check the calculator by hand before relying on a result.
Assumptions behind the result
- • The wall is measured after trim.
- • Batten widths are consistent.
- • The layout is straight rather than wrapped around corners.
- • Openings are handled as separate wall sections.
- • Measurements use one common reference edge.
Mistakes that change the answer
- • Dividing wall width before subtracting battens.
- • Using nominal lumber width.
- • Accumulating rounding error one gap at a time.