{
  "slug": "firewood-cord",
  "title": "Firewood Cord & Heating Cost Calculator",
  "heading": "Firewood Cord Calculator",
  "category": "other",
  "url": "https://www.revenuelab.fyi/toolbox/firewood-cord",
  "summary": "Cords in a stack, seasonal need, and cost per million BTU.",
  "description": "Convert a stack's dimensions into cords, estimate how many cords a heating season takes, and compare wood heat against your alternative fuel on a cost-per-BTU basis.",
  "formula": "1 cord = 128 cu ft. Seasoned hardwood ≈ 20 million BTU per cord.",
  "dateModified": "2026-09-30",
  "run_url": "https://www.revenuelab.fyi/api/public/calc?tool=firewood-cord",
  "inputs": [
    {
      "id": "len",
      "label": "Stack length",
      "kind": "number",
      "hint": null,
      "default": 16,
      "unit": "ft",
      "min": 0,
      "max": null
    },
    {
      "id": "ht",
      "label": "Stack height",
      "kind": "number",
      "hint": null,
      "default": 4,
      "unit": "ft",
      "min": 0,
      "max": null
    },
    {
      "id": "depth",
      "label": "Log length (stack depth)",
      "kind": "number",
      "hint": null,
      "default": 1.33,
      "unit": "ft",
      "min": 0.5,
      "max": null
    },
    {
      "id": "price",
      "label": "Price per cord",
      "kind": "number",
      "hint": null,
      "default": 300,
      "unit": "$",
      "min": 0,
      "max": null
    },
    {
      "id": "seasonCords",
      "label": "Cords burned per season",
      "kind": "number",
      "hint": null,
      "default": 3,
      "unit": null,
      "min": 0,
      "max": null
    },
    {
      "id": "efficiency",
      "label": "Stove efficiency",
      "kind": "number",
      "hint": null,
      "default": 70,
      "unit": "%",
      "min": 20,
      "max": 95
    }
  ],
  "outputs": [
    {
      "id": "cords",
      "label": "Cords in the stack",
      "format": "decimal",
      "hint": null,
      "primary": true
    },
    {
      "id": "value",
      "label": "Stack value",
      "format": "currency",
      "hint": null,
      "primary": false
    },
    {
      "id": "seasonCost",
      "label": "Season heating cost",
      "format": "currency",
      "hint": null,
      "primary": false
    },
    {
      "id": "perMmbtu",
      "label": "Cost per million BTU",
      "format": "currency",
      "hint": null,
      "primary": false
    },
    {
      "id": "cubic",
      "label": "Cubic feet",
      "format": "decimal",
      "hint": null,
      "primary": false
    }
  ],
  "worked_example": {
    "inputs": [
      "Stack length: 16 ft",
      "Stack height: 4 ft",
      "Log length (stack depth): 1.33 ft",
      "Price per cord: 300 $",
      "Cords burned per season: 3",
      "Stove efficiency: 70 %"
    ],
    "outputs": [
      "Cords in the stack: 0.67",
      "Stack value: $200",
      "Season heating cost: $900",
      "Cost per million BTU: $21.43",
      "Cubic feet: 85"
    ]
  },
  "how_to": {
    "title": "How to use this",
    "steps": [
      "Enter stack length (ft).",
      "Enter stack height (ft).",
      "Enter log length (stack depth) (ft).",
      "Enter price per cord ($).",
      "Enter cords burned per season.",
      "Enter stove efficiency (%).",
      "Read your cords in the stack 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": {
        "len": 10,
        "ht": 2.4,
        "depth": 0.798,
        "price": 180,
        "seasonCords": 1.7999999999999998,
        "efficiency": 40
      }
    },
    {
      "name": "Typical",
      "description": "Defaults — the most common real-world setup.",
      "values": {
        "len": 16,
        "ht": 4,
        "depth": 1.33,
        "price": 300,
        "seasonCords": 3,
        "efficiency": 70
      }
    },
    {
      "name": "Ambitious",
      "description": "Higher-end numbers — what if things really pop?",
      "values": {
        "len": 26,
        "ht": 6.4,
        "depth": 2.128,
        "price": 480,
        "seasonCords": 4.800000000000001,
        "efficiency": 95
      }
    }
  ],
  "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": "What's a face cord?",
      "a": "A stack 4 ft × 8 ft with whatever log length you cut — typically a third of a full cord. Always ask for dimensions, not the word 'cord'."
    },
    {
      "q": "Does wood species matter?",
      "a": "A lot. Oak and hickory carry 24–28 million BTU per cord; pine and poplar closer to 15."
    }
  ],
  "related": [],
  "license": "CC-BY-4.0",
  "citation": "RevenueLab — Firewood Cord & Heating Cost Calculator (https://www.revenuelab.fyi/toolbox/firewood-cord)"
}