Deck planning tool
12x16 Deck Material Calculator
Start with a 12 × 16 ft deck preset, then adjust board size, spacing, waste, and direction to match the material you plan to buy.
Project planning calculator
Decking Material Estimator
Estimate boards, decking linear footage, joists, and fasteners for a rectangular deck. Enter actual board dimensions for a more useful result.
Project dimensions
Use feet for project and board lengths; use inches for widths and spacing.
Material estimate
Rounded up to whole purchasable quantities.
Deck area
192 sq ft
Deck-board rows
26
Decking to purchase
457.6 linear ft
16-ft boards
29
Estimated joists
13
Joist material
156 linear ft
Deck fasteners
About 744
90-count fastener boxes
9
How this result was calculated
- Rows = deck width across the boards divided by actual board width plus gap, rounded up.
- Decking = rows × board run length × 1.1 for waste.
- Board pieces = decking linear feet divided by stock board length, rounded up.
- Joists are placed perpendicular to the deck boards at the selected on-center spacing.
- Fasteners assume two fasteners at every board-to-joist intersection.
Building it yourself?
Shop your material list
Use the estimate above as a starting quantity, then verify dimensions and compatibility on the retailer product page.
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What to check before buying
- A 12 × 16 ft rectangle has 192 square feet of surface area before stairs, borders, or cutouts.
- Board count changes with actual face width, gap, stock length, board direction, and waste allowance.
- Framing quantities are planning estimates only; structural sizing and spans must be checked separately.