{
  "slug": "gravel",
  "title": "Gravel Calculator",
  "heading": "Gravel Calculator",
  "category": "other",
  "url": "https://www.revenuelab.fyi/toolbox/gravel",
  "summary": "Tons and yards of gravel for a driveway or base layer.",
  "description": "Gravel is sold by the ton or the cubic yard depending on the supplier. Crushed stone runs roughly 1.4 tons per cubic yard, so this converts both ways and prices the load.",
  "formula": "Volume (yd³) = Area × Depth (ft) ÷ 27. Tons = Volume × density.",
  "dateModified": "2026-09-30",
  "run_url": "https://www.revenuelab.fyi/api/public/calc?tool=gravel",
  "inputs": [
    {
      "id": "length",
      "label": "Length",
      "kind": "number",
      "hint": null,
      "default": 40,
      "unit": "ft",
      "min": 0,
      "max": null
    },
    {
      "id": "width",
      "label": "Width",
      "kind": "number",
      "hint": null,
      "default": 10,
      "unit": "ft",
      "min": 0,
      "max": null
    },
    {
      "id": "depth",
      "label": "Depth",
      "kind": "number",
      "hint": null,
      "default": 4,
      "unit": "in",
      "min": 0.5,
      "max": null
    },
    {
      "id": "density",
      "label": "Density",
      "kind": "number",
      "hint": null,
      "default": 1.4,
      "unit": "tons/yd³",
      "min": 0.8,
      "max": 2.2
    },
    {
      "id": "price",
      "label": "Price per ton",
      "kind": "number",
      "hint": null,
      "default": 45,
      "unit": "$",
      "min": 0,
      "max": null
    }
  ],
  "outputs": [
    {
      "id": "tons",
      "label": "Gravel needed (tons)",
      "format": "decimal",
      "hint": null,
      "primary": true
    },
    {
      "id": "yards",
      "label": "Cubic yards",
      "format": "decimal",
      "hint": null,
      "primary": false
    },
    {
      "id": "cost",
      "label": "Estimated cost",
      "format": "currency",
      "hint": null,
      "primary": false
    },
    {
      "id": "area",
      "label": "Area covered (sq ft)",
      "format": "number",
      "hint": null,
      "primary": false
    }
  ],
  "worked_example": {
    "inputs": [
      "Length: 40 ft",
      "Width: 10 ft",
      "Depth: 4 in",
      "Density: 1.4 tons/yd³",
      "Price per ton: 45 $"
    ],
    "outputs": [
      "Gravel needed (tons): 6.91",
      "Cubic yards: 4.94",
      "Estimated cost: $311.11",
      "Area covered (sq ft): 400"
    ]
  },
  "how_to": {
    "title": "How to use this",
    "steps": [
      "Enter length (ft).",
      "Enter width (ft).",
      "Enter depth (in).",
      "Enter density (tons/yd³).",
      "Enter price per ton ($).",
      "Read your gravel needed (tons) 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": 24,
        "width": 6,
        "depth": 2.4,
        "density": 0.84,
        "price": 27
      }
    },
    {
      "name": "Typical",
      "description": "Defaults — the most common real-world setup.",
      "values": {
        "length": 40,
        "width": 10,
        "depth": 4,
        "density": 1.4,
        "price": 45
      }
    },
    {
      "name": "Ambitious",
      "description": "Higher-end numbers — what if things really pop?",
      "values": {
        "length": 64,
        "width": 16,
        "depth": 6.4,
        "density": 2.2,
        "price": 72
      }
    }
  ],
  "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 gravel calculator work?",
      "a": "Gravel is sold by the ton or the cubic yard depending on the supplier. Crushed stone runs roughly 1.4 tons per cubic yard, so this converts both ways and prices the load. The underlying maths is: Volume (yd³) = Area × Depth (ft) ÷ 27. Tons = Volume × density."
    },
    {
      "q": "What do I need to enter?",
      "a": "5 values: length, width, depth, density, and price per ton. 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 gravel needed (tons) result mean?",
      "a": "It is returned as a decimal 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/mulch",
    "https://www.revenuelab.fyi/toolbox/topsoil",
    "https://www.revenuelab.fyi/toolbox/sand"
  ],
  "license": "CC-BY-4.0",
  "citation": "RevenueLab — Gravel Calculator (https://www.revenuelab.fyi/toolbox/gravel)"
}