{
  "slug": "20x20-gravel-driveway-calculator",
  "title": "20x20 Gravel Driveway Calculator",
  "heading": "20x20 Gravel Driveway Calculator",
  "category": "other",
  "url": "https://www.revenuelab.fyi/toolbox/20x20-gravel-driveway-calculator",
  "summary": "Tons of gravel and cost needed for a 20x20 gravel driveway pad.",
  "description": "A 20x20 gravel pad is common for a parking area or short driveway spur. This calculator defaults to that footprint with a 4-inch depth and standard gravel density, returning the tons you need to order and total material cost.",
  "formula": "Cubic Feet = Length × Width × (Depth in / 12). Tons = Cubic Feet × 100 lb/cf ÷ 2000. Cost = Tons × Price per Ton.",
  "dateModified": "2026-09-06",
  "run_url": "https://www.revenuelab.fyi/api/public/calc?tool=20x20-gravel-driveway-calculator",
  "inputs": [
    {
      "id": "length",
      "label": "Driveway length",
      "kind": "number",
      "hint": null,
      "default": 20,
      "unit": "ft",
      "min": 1,
      "max": null
    },
    {
      "id": "width",
      "label": "Driveway width",
      "kind": "number",
      "hint": null,
      "default": 20,
      "unit": "ft",
      "min": 1,
      "max": null
    },
    {
      "id": "depth",
      "label": "Gravel depth",
      "kind": "number",
      "hint": null,
      "default": 4,
      "unit": "in",
      "min": 2,
      "max": 12
    },
    {
      "id": "pricePerTon",
      "label": "Price per ton",
      "kind": "number",
      "hint": null,
      "default": 45,
      "unit": "$",
      "min": 0,
      "max": null
    }
  ],
  "outputs": [
    {
      "id": "tons",
      "label": "Gravel needed",
      "format": "decimal",
      "hint": null,
      "primary": true
    },
    {
      "id": "cost",
      "label": "Estimated gravel cost",
      "format": "currency",
      "hint": null,
      "primary": false
    },
    {
      "id": "cubicFeet",
      "label": "Total cubic feet",
      "format": "number",
      "hint": null,
      "primary": false
    }
  ],
  "worked_example": {
    "inputs": [
      "Driveway length: 20 ft",
      "Driveway width: 20 ft",
      "Gravel depth: 4 in",
      "Price per ton: 45 $"
    ],
    "outputs": [
      "Gravel needed: 6.67",
      "Estimated gravel cost: $300",
      "Total cubic feet: 133"
    ]
  },
  "how_to": {
    "title": "How to use this",
    "steps": [
      "Enter driveway length (ft).",
      "Enter driveway width (ft).",
      "Enter gravel depth (in).",
      "Enter price per ton ($).",
      "Read your gravel 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": 12,
        "width": 12,
        "depth": 2.4,
        "pricePerTon": 27
      }
    },
    {
      "name": "Typical",
      "description": "Defaults — the most common real-world setup.",
      "values": {
        "length": 20,
        "width": 20,
        "depth": 4,
        "pricePerTon": 45
      }
    },
    {
      "name": "Ambitious",
      "description": "Higher-end numbers — what if things really pop?",
      "values": {
        "length": 32,
        "width": 32,
        "depth": 6.4,
        "pricePerTon": 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 much gravel do I need for a 20x20 driveway pad?",
      "a": "At 4 inches deep, about 6 tons — thicker driveways bearing heavier vehicles often use 6-8 inches, which would raise this to 9-12 tons."
    },
    {
      "q": "What type of gravel is best for a driveway?",
      "a": "Crushed stone like 3/4-inch minus with fines compacts well and drains better than smooth river rock, which shifts under tire weight."
    },
    {
      "q": "Do I need multiple gravel layers?",
      "a": "Larger driveways often use a coarse base layer topped with a finer surface layer; this calculator estimates total volume, and you can split it across layers as needed."
    }
  ],
  "related": [
    "https://www.revenuelab.fyi/toolbox/100-ft-gravel-driveway-calculator"
  ],
  "license": "CC-BY-4.0",
  "citation": "RevenueLab — 20x20 Gravel Driveway Calculator (https://www.revenuelab.fyi/toolbox/20x20-gravel-driveway-calculator)"
}