Board and Batten Calculator

Board and batten is a type of wall siding made of wide vertical boards with narrow strips (battens) covering the seams between boards. This creates an alternating pattern that gives walls a classic, rustic appearance.

Start with your desired approximate spacing (usually 8-16 inches), then use this calculator to find the exact spacing that creates an even layout across your wall width. The calculator adjusts your desired spacing to ensure symmetrical placement.

Common materials include cedar, pine, fir, or composite boards. Cedar is popular for exterior use due to its weather resistance, while pine and poplar work well for interior applications. Boards are typically 1x8 to 1x12 inches.

Boards are typically 3/4 inch thick (actual dimension of 1x lumber), while battens are usually 1/2 to 3/4 inch thick and 1.5 to 3 inches wide. The batten should be thick enough to cover board seams with some overhang.

For exterior siding, yes - install plywood or OSB sheathing as a base. For interior accent walls, you can install directly over drywall if studs are properly located, or add a plywood backing for easier installation.

This calculator determines the exact number of boards and total length of battens needed. Add 10-15% extra material for cuts, waste, and potential mistakes. Also account for any windows or doors that reduce the wall area.

Yes, typically place battens at both ends of the wall for a finished look. The calculator includes corner battens in its spacing calculations to ensure even distribution across the entire wall width.

Yes, you can adjust either the desired spacing or number of battens to achieve different layouts. The calculator will always provide the mathematically exact spacing needed for even distribution based on your wall dimensions.