Perfectly even battens, zero math at the wall
Board and Batten Calculator
The hard part of board and batten wainscoting is not the nailing — it's getting every gap identical. Enter your wall width, batten size and target spacing; the calculator solves the layout with a batten at each end, returns the exact gap to the sixteenth of an inch, and builds your cut list.
How the Layout Math Works
With a batten at each end of the wall, the gaps between battens follow one formula:
gap = (wall width − battens × batten width) ÷ (battens − 1)
The calculator tries batten counts around your target spacing and picks the one whose gap lands closest, then reports the exact figure — because "about 18 inches" is how walls end up with one embarrassing narrow bay at the corner. Mark every batten center before any adhesive comes out, and check the first and last bays twice.
Corners matter: on connected walls, treat each wall separately with a batten in the corner, and keep the reveal consistent. Outlets falling on a batten line? Shift the whole field half a gap before you compromise the spacing.
Height & Proportion Guide
| Style | Height | Effect |
|---|
| Classic wainscot | 32–38" (⅓ wall) | Traditional, aligns with chair rail |
| Tall wainscot | 42–48" | Entry halls, mudrooms — protects and grounds |
| Two-thirds wall | ~60" (⅔ wall) | The designer favorite — adds height and drama |
| Full wall | Floor to ceiling | Modern, architectural; pairs with a picture-rail cap |
Avoid ending the treatment at exactly half the wall height — it bisects the room. One-third or two-thirds keeps the proportion deliberate.
Frequently Asked Questions
How far apart should board and batten be spaced?
16–24 inches between battens; 18 is the classic start. Wider reads modern, tighter reads cottage. Equal gaps matter more than the exact number.
How high should board and batten wainscoting be?
One-third of the wall (32–38") for classic wainscot, two-thirds (~60") for drama, or full height for a modern room. Avoid the exact half-wall line.
What size boards for board and batten?
1×3 (2.5") battens suit most walls; 1×2 is delicate, 1×4 is bold. Rails are typically 1×4, with an optional 1×2 top ledge.
How do you calculate even spacing?
gap = (wall − battens × batten width) ÷ (battens − 1), with a batten at each end. Pick the count whose gap lands nearest your target — that's exactly what this calculator does.
MDF or real wood?
Primed MDF for painted walls; pine or poplar where corners take abuse; PVC in wet rooms. Skim or panel textured walls first so the field reads crisp.
This calculator is built and maintained by Nakada Design, the Los Angeles marketing agency for
interior designers and
architects. If you want the clients searching for answers like these to find your studio, see our services or
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