Board and Batten Calculator
Design your board and batten layout with precision. Enter your wall dimensions, batten width, and desired number of battens to calculate exact board widths, material quantities, and linear footage for your siding or accent wall project.
Total width of the wall to cover in inches
Height of the wall in inches
Width of each batten strip (typically 1×2 or 1×3)
Total number of vertical battens including ends
Small expansion gap between boards (typically ⅛ inch)
Total Batten Width = Battens × Batten Width
Total Gap Width = Boards × Board Gap
Board Width = (Wall Width - Total Batten Width - Total Gap Width) / Boards
Linear Feet = Number of Pieces × Wall Height (ft)
Area (sq ft) = Width (ft) × Height (ft) per piece
Boards = 8 - 1 = 7
Total batten width = 8 × 2.5 = 20 in
Total gap = 7 × 0.125 = 0.875 in
Board width = (120 - 20 - 0.875) / 7 = 14.16 in
Board LF = 7 × 8 = 56 lf
Batten LF = 8 × 8 = 64 lf
Result: 7 boards at 14.16 inches wide
What is board and batten siding and how does it work?
Board and batten is a type of exterior wall siding that consists of wide vertical boards (usually 12-16 inches wide) with narrow strips (battens) covering the seams between them. The battens are typically 1×2 or 1×3 lumber. This creates a distinctive vertical ribbed appearance that adds depth and texture to walls. The boards can be installed with small gaps (⅛ to ¼ inch) for expansion, with the batten covering the gap. Modern variations include using sheet plywood with battens attached on top for a more cost-effective installation.
How do I calculate the right spacing for boards and battens?
The spacing depends on the total wall width, the number of board sections you want, and your batten width. Start by deciding the number of battens (typically one at each end plus one between each board). The number of boards equals number of battens minus 1. Divide the remaining wall width by the number of boards to get board width. Formula: Board Width = (Total Width - Number of Battens × Batten Width) / Number of Boards. Common board widths range from 12-20 inches. Adjust number of battens to get a pleasing board width.
What materials are best for board and batten siding?
Common materials: Cedar boards (naturally rot-resistant, lightweight, beautiful grain - most popular), Pine/spruce (more affordable, needs proper finishing), Fiber cement (fire-resistant, durable, low maintenance, heavier), PVC/vinyl (zero maintenance, waterproof, good for bathrooms), and MDF (budget-friendly, interior use only). For exterior applications, cedar or fiber cement are best. For interior accent walls, MDF or pine are popular choices. Battens are typically made from the same material for a cohesive look.
Should I use board and batten for interior or exterior walls?
Board and batten works beautifully for both. Interior applications include accent walls, wainscoting, mudroom lockers, and bathroom walls. It adds warmth and architectural interest to any room. Exterior applications include full-house siding, gable ends, porch enclosures, and garden shed walls. For exterior use, proper weatherproofing is essential - house wrap, flashing, and proper caulking at top and bottom. Interior board and batten is simpler to install and can use less expensive materials like MDF or primed pine.
🔗 Related Calculators
📐 Formula
Total Batten Width = Battens × Batten Width
Total Gap Width = Boards × Board Gap
Board Width = (Wall Width - Total Batten Width - Total Gap Width) / Boards
Linear Feet = Number of Pieces × Wall Height (ft)
Area (sq ft) = Width (ft) × Height (ft) per piece
📝 Example Calculation
Boards = 8 - 1 = 7
Total batten width = 8 × 2.5 = 20 in
Total gap = 7 × 0.125 = 0.875 in
Board width = (120 - 20 - 0.875) / 7 = 14.16 in
Board LF = 7 × 8 = 56 lf
Batten LF = 8 × 8 = 64 lf
Result: 7 boards at 14.16 inches wide