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Board & Batten Spacing Calculator: Equal Gaps & Layout Marks

Lay out a single uninterrupted board-and-batten wall span without letting small rounding errors accumulate from one bay to the next. Choose a target clear gap or a fixed batten count, then choose whether battens sit at both wall edges or the pattern keeps equal open end spaces.

Maintained by Home Measure Lab Editorial TeamUpdated Method & corrections

Project measurements

Change the defaults to match your project and the product you plan to buy.

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ft
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Project result

Equal board-and-batten layout

Use the solved exact clear gap and on-center spacing, then transfer every mark from the same wall datum. Review the edge treatment before marking because it changes the first position and the number of open spaces.

Planning estimate only. Verify product coverage, package size, supplier specifications and project requirements before purchasing.

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Budget scenario

Add your current local costs

Use a current supplier subtotal or reuse a priced calculator result, then add optional delivery, tax and contingency. Home Measure Lab does not fetch or guess live prices.

This calculator does not currently expose a priced result. Enter a current supplier subtotal manually.
Material subtotal$0.00
Delivery / fees$0.00
Tax$0.00
Contingency$0.00
Planning total$0.00

Enter a current supplier subtotal or reuse a priced calculator result.

Budget values are local planning inputs, not live quotes. Verify tax treatment, delivery, labor and supplier pricing before purchasing.

Methodology

Equal-spacing formula & layout assumptions

Both-edge clear gap

(wall width − batten count × batten width) ÷ (batten count − 1)

Use only when the first and last battens sit flush with the two layout boundaries.

Equal-end clear gap

(wall width − batten count × batten width) ÷ (batten count + 1)

The two end spaces and every interior clear gap are equal.

On-center spacing

exact clear gap + actual batten width

Adjacent battens share the same center-to-center increment once the exact gap is solved.

Mark position

first batten start + index × on-center spacing

Calculate each mark from one reference edge using full precision; do not walk a rounded gap across the wall.

How to measure this project

Measure the finished horizontal span where one balanced decorative pattern begins and ends. Note baseboard/top rail/casing intersections separately, and use the finished visible batten face width. If a window, door or other full-height feature interrupts the pattern, decide whether it is a true pattern boundary or a feature that needs a separate centered-layout decision before using one simple span.

Before you buy materials

The result reports vertical batten linear footage and whether the entered stock is at least as long as the batten height. Do not assume shorter stock can be invisibly spliced. Add top/bottom rails, returns, trim, waste, fastening and substrate materials separately from the vertical-batten spacing calculation.

Reference

Spacing terms that should not be mixed

TermMeaningUse
Wall spanfinished horizontal layout widthfixed project boundary
Batten face widthvisible installed widthsubtracted from available span
Clear gapopen space between adjacent batten facesvisual bay width
On-center spacingcenter of one batten to center of the nextrepeat increment for marks
End spaceopen boundary-to-first/last batten distancedepends on selected edge treatment

Questions

Frequently asked questions

Why is the exact gap different from my target gap?

A wall needs a whole number of battens. Target-gap mode evaluates feasible whole counts and chooses the layout whose exact clear gap is closest to the target you entered.

Should I divide by the number of battens or the number of spaces?

Neither rule is universal by itself. The denominator depends on the edge treatment: with battens at both edges there are count minus one gaps; with equal open end spaces there are count plus one equal gaps.

Can I use this for structural wall furring?

No. Wall Furring Strip Calculator owns project-selected support spacing and stock quantity. Decorative board-and-batten spacing is a different user job.

Does this include top and bottom rails?

No. This calculator solves vertical batten layout only. Rails, trim returns and other horizontal members should be measured and purchased separately.

How do I avoid cumulative rounding error?

Use the solved full-precision spacing and calculate each mark from the same starting datum. Do not add a rounded displayed spacing to the previous mark repeatedly.

Next step

Keep this project moving

Follow the measurement into the most useful related reference, calculator or project view.

Understand the inputHow to Measure a Wall Span for Board & BattenContinue →Related projectWall Furring Strip CalculatorContinue →Browse this project typeWalls & Ceilings calculatorsContinue →

Planning guides

Understand the inputs behind this calculator

All guides →

Walls & Ceilings

How to Measure a Wall Span for Board & Batten

Measure the real board-and-batten layout span, batten face width and pattern boundaries before solving equal spacing.

Read guide →

Walls & Ceilings

Board & Batten Clear Gap vs On-Center Spacing

Understand clear gap, on-center spacing, edge treatments and mark positions so a board-and-batten layout stays even across the wall.

Read guide →

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