Estimate how many deck boards you need from deck dimensions, board face width, gap, board length and waste allowance.
This estimator converts board face width and gap into effective coverage, then divides the deck area by the coverage per full board. It is a material estimate rather than a cut-list.
Boards \u2248 deck area with waste \u00f7 effective coverage per boardFor a 12 \u00d7 12 ft deck using 12 ft boards, the board face width plus gap determines each board\u2019s effective coverage.
The correct gap depends on decking material, moisture content and manufacturer guidance. Use the installation specification for your product.
Nominal lumber sizes describe the trade size, while the finished face width is often smaller. Coverage depends on the actual face width.
No. Borders, breaker boards and diagonal layouts change the cutting plan, so add them separately or increase the allowance.
Yes. Boards are purchased as whole lengths, and spare material helps cover cuts, defects and future repairs.