Practical tools for measured work
Board and batten spacing calculator
Lay out edge-flush battens with equal clear gaps, coordinates, quantities and waste.
Calculate the layout, check the diagram, then print the result for the shop or jobsite.
Batten positions from left edge
| Batten | Centre distance (mm) | Left edge (mm) |
|---|---|---|
| 1 | 25 | 0 |
| 2 | 516.666667 | 491.666667 |
| 3 | 1008.33333 | 983.333333 |
| 4 | 1500 | 1475 |
| 5 | 1991.66667 | 1966.66667 |
| 6 | 2483.33333 | 2458.33333 |
| 7 | 2975 | 2950 |
How it works
Place a full-width batten flush at each panel edge, then divide the remaining area into equal clear gaps no larger than your maximum. Batten centre spacing equals face width plus clear gap. The purchase count rounds up the installed count after applying your waste percentage; backing area is width × height.
Current-input example
The result above uses these exact values. This snapshot is included when the page is printed so the output can be checked against the original measurements.
- Total panel width
- 3000 mm
- Batten face width
- 50 mm
- Maximum clear panel gap
- 500 mm
- Batten height
- 2400 mm
- Waste allowance
- 10 %
Primary result: Installed battens: 7.
Before using the result
- Measure from the datum or reference edge described by this tool, and do not mix inside, outside and centerline dimensions.
- Keep inputs in the displayed units and preserve more precision than the final cutting or purchasing tolerance requires.
- When the result is close to a limit, verify it with a test piece, field measurement, manufacturer drawing or qualified project professional.
Limitations
This is a decorative batten layout with continuous backing, not a weatherproof exterior siding specification. Backing sheet sizes, seam overlaps, horizontal rails, fasteners, trim and openings are excluded. Use actual face widths and verify the wall before cutting.
Frequently asked questions
What should I verify before using this result?
Recheck the physical measurements, confirm that every input uses the displayed unit, and compare the result with the applicable drawing, product specification, code requirement or test piece.
Why might the finished result differ?
Real work can include thickness, kerf, seams, tolerances, hardware allowances, installation clearances or site conditions that are outside the calculation. The limitations section identifies the main exclusions for this tool.
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