Example: Deck length: 16 ft · Deck width: 12 ft · Board width: 5.5 in (standard) · Waste: 10% → Decking: 458 linear ft.
Joists (16 in OC): 13 × 12 ft
Deck area: 192 sq ft
Screws (~350/100 sq ft): 672
Frequently asked questions
How do I calculate deck material? Enter your numbers above and the result updates instantly. For example: Deck length: 16 ft · Deck width: 12 ft · Board width: 5.5 in (standard) · Waste: 10% → Decking: 458 linear ft.
Is this Deck Material Calculator free? Yes — completely free with no sign-up or paywall. It runs entirely in your browser and keeps working offline; the numbers you enter never leave your device.
How accurate is it? It uses the standard published formula for deck material. Results are estimates for planning — not financial, tax, medical, engineering, or legal advice.