Board and Batten Calculator

Board and batten is a wall of wide vertical boards with narrow strips — battens — covering the seams. The look is set by how far apart the battens sit. Pick a batten spacing on centre, divide the wall's width by it, and add one, because a wall dressed this way carries a batten at each end as well as at every seam in between. A `16 ft` wall at `12 in` spacing takes `16` bays plus the end batten, so `17` battens.

The field boards behind the battens are counted from their own width: divide the wall width by the board's face width and round up. Both the battens and the boards run the full height of the wall, so multiplying each count by the wall height gives the linear feet to buy — useful because siding is priced and stocked by length. Corners, windows, and doors change the real board count, so treat the field-board figure as the full-wall starting point and adjust for openings.

Enter the wall's width and height, the batten spacing you like, and the width of your field boards. The tool returns the batten count, the field-board count, and the linear feet of each, plus the wall area. It counts material for a plain rectangular wall; subtract openings and add wrap for corners as your elevation requires.