{
  "slug": "deck-board-calculator",
  "title": "Deck Board Calculator",
  "heading": "Deck Board & Material Calculator",
  "category": "other",
  "url": "https://www.revenuelab.fyi/toolbox/deck-board-calculator",
  "summary": "Board count, joists, fasteners, and material cost for a deck.",
  "description": "Deck framing waste is driven by board length versus deck width. Ordering boards that span the deck in one run cuts both waste and butt joints.",
  "formula": "Boards = deck area ÷ (board width + gap) × length factor, plus waste.",
  "dateModified": "2026-09-30",
  "run_url": "https://www.revenuelab.fyi/api/public/calc?tool=deck-board-calculator",
  "inputs": [
    {
      "id": "length",
      "label": "Deck length",
      "kind": "number",
      "hint": null,
      "default": 16,
      "unit": "ft",
      "min": 1,
      "max": null
    },
    {
      "id": "width",
      "label": "Deck width",
      "kind": "number",
      "hint": null,
      "default": 12,
      "unit": "ft",
      "min": 1,
      "max": null
    },
    {
      "id": "boardWidth",
      "label": "Board width",
      "kind": "number",
      "hint": null,
      "default": 5.5,
      "unit": "in",
      "min": 2,
      "max": null
    },
    {
      "id": "gap",
      "label": "Gap between boards",
      "kind": "number",
      "hint": null,
      "default": 0.25,
      "unit": "in",
      "min": 0,
      "max": 1
    },
    {
      "id": "boardLen",
      "label": "Board length sold",
      "kind": "number",
      "hint": null,
      "default": 16,
      "unit": "ft",
      "min": 4,
      "max": null
    },
    {
      "id": "price",
      "label": "Price per board",
      "kind": "number",
      "hint": null,
      "default": 22,
      "unit": "$",
      "min": 0,
      "max": null
    },
    {
      "id": "waste",
      "label": "Waste factor",
      "kind": "number",
      "hint": null,
      "default": 10,
      "unit": "%",
      "min": 0,
      "max": 30
    }
  ],
  "outputs": [
    {
      "id": "boards",
      "label": "Deck boards needed",
      "format": "number",
      "hint": null,
      "primary": true
    },
    {
      "id": "cost",
      "label": "Decking material cost",
      "format": "currency",
      "hint": null,
      "primary": false
    },
    {
      "id": "linearFt",
      "label": "Linear feet of decking",
      "format": "decimal",
      "hint": null,
      "primary": false
    },
    {
      "id": "area",
      "label": "Deck area (sq ft)",
      "format": "decimal",
      "hint": null,
      "primary": false
    },
    {
      "id": "joists",
      "label": "Joists at 16 in on center",
      "format": "number",
      "hint": null,
      "primary": false
    },
    {
      "id": "screws",
      "label": "Deck screws (approx)",
      "format": "number",
      "hint": null,
      "primary": false
    }
  ],
  "worked_example": {
    "inputs": [
      "Deck length: 16 ft",
      "Deck width: 12 ft",
      "Board width: 5.5 in",
      "Gap between boards: 0.25 in",
      "Board length sold: 16 ft",
      "Price per board: 22 $",
      "Waste factor: 10 %"
    ],
    "outputs": [
      "Deck boards needed: 28",
      "Decking material cost: $616",
      "Linear feet of decking: 441",
      "Deck area (sq ft): 192",
      "Joists at 16 in on center: 13",
      "Deck screws (approx): 970"
    ]
  },
  "how_to": {
    "title": "How to use this",
    "steps": [
      "Enter deck length (ft).",
      "Enter deck width (ft).",
      "Enter board width (in).",
      "Enter gap between boards (in).",
      "Enter board length sold (ft).",
      "Enter price per board ($).",
      "Enter waste factor (%).",
      "Read your deck boards needed on the right — it updates as you type.",
      "Hit Share to keep the scenario or send it to someone."
    ]
  },
  "scenarios": [
    {
      "name": "Conservative",
      "description": "Lower-end numbers — what if things land soft?",
      "values": {
        "length": 9.6,
        "width": 7.199999999999999,
        "boardWidth": 3.3,
        "gap": 0.15,
        "boardLen": 10,
        "price": 13,
        "waste": 6
      }
    },
    {
      "name": "Typical",
      "description": "Defaults — the most common real-world setup.",
      "values": {
        "length": 16,
        "width": 12,
        "boardWidth": 5.5,
        "gap": 0.25,
        "boardLen": 16,
        "price": 22,
        "waste": 10
      }
    },
    {
      "name": "Ambitious",
      "description": "Higher-end numbers — what if things really pop?",
      "values": {
        "length": 25.6,
        "width": 19.200000000000003,
        "boardWidth": 8.8,
        "gap": 0.4,
        "boardLen": 26,
        "price": 35,
        "waste": 16
      }
    }
  ],
  "limitations": [
    "Estimates assume standard, average conditions — local rules, pricing, and materials vary.",
    "Results are rounded for readability; add a buffer before ordering, booking, or committing.",
    "Double-check anything with a real cost attached against a local quote."
  ],
  "faq": [
    {
      "q": "How does the deck board & material calculator work?",
      "a": "Deck framing waste is driven by board length versus deck width. Ordering boards that span the deck in one run cuts both waste and butt joints. The underlying maths is: Boards = deck area ÷ (board width + gap) × length factor, plus waste."
    },
    {
      "q": "What do I need to enter?",
      "a": "7 values: deck length, deck width, board width, gap between boards, board length sold, price per board, and waste factor. Each field starts with a sensible default, so you can change one number at a time and watch the result move."
    },
    {
      "q": "What does the deck boards needed result mean?",
      "a": "It is returned as a whole number and updates live as you edit the inputs, so you can compare two or three versions of a scenario in a few seconds."
    },
    {
      "q": "Is this calculator free, and do I need an account?",
      "a": "Yes, it's free, and no account is required. Nothing you type is stored on our servers — the maths runs entirely in your browser."
    },
    {
      "q": "How accurate is the result?",
      "a": "It applies the standard formula exactly, so the arithmetic is precise. Estimates assume standard, average conditions — local rules, pricing, and materials vary."
    },
    {
      "q": "Who is this tool for?",
      "a": "It's built for anyone doing everyday planning maths — a quick estimate that would otherwise need four browser tabs and a calculator app."
    }
  ],
  "related": [
    "https://www.revenuelab.fyi/toolbox/fence-calculator",
    "https://www.revenuelab.fyi/toolbox/stair-stringer"
  ],
  "license": "CC-BY-4.0",
  "citation": "RevenueLab — Deck Board Calculator (https://www.revenuelab.fyi/toolbox/deck-board-calculator)"
}