How it works
Lay out even board-and-batten spacing across a wall and count boards, battens, and linear footage.
Enter the wall width and height, the batten width, and a preferred center-to-center spacing. The calculator rounds to the nearest whole number of spaces and returns the exact resulting spacing, exposed board width, and material counts.
Formula
spaces = round(wall width ÷ preferred spacing); battens = spaces + 1; boards = spaces; actual spacing = wall width ÷ spaces; exposed board = actual spacing − batten width.
W- Wall width (in (ft × 12))
S- Preferred batten spacing (in)
T- Batten width (in)
Examples
- 12 ft wall, 16 in spacing, 3 in battensWall 12 × 8 ft · batten 3 in · spacing 16 in10 battens · 9 boards · 16 in spacing · 13 in exposed board
Frequently asked questions
Why is the spacing rounded?
A wall rarely divides evenly. The calculator picks the nearest whole number of spaces so every gap is identical instead of one odd-sized gap.
Do I need a batten on each edge?
Most board-and-batten designs place a batten at each outer edge and over every seam, which is why battens = spaces + 1.
How to read the result
Boards fill the gaps between battens; the exposed board width is the visible board face after the batten covers its edge.
Limitations
Assumes a rectangular wall with no doors, windows, or outlets and evenly spaced battens. Does not subtract openings or add waste.
Source: Even-batten layout: round-to-nearest-space geometry with battens over seams and edges.