{
  "id": "gravel-calculator",
  "version": "20.13.0",
  "name": "Gravel Calculator",
  "shortName": "Gravel",
  "description": "Estimate the amount of gravel needed for your driveway, path, or landscaping project. Add editable USD material and labor prices and compare low, middle and high budget scenarios.",
  "category": "Home & Construction",
  "categorySlug": "home-construction",
  "keywords": [
    "gravel"
  ],
  "status": "live",
  "workStatus": "pending",
  "reviewStatus": "pending",
  "migrationStatus": "migrated",
  "migratedDate": "2026-09-10",
  "engine": "native",
  "creator": null,
  "reviewer": null,
  "quality": {
    "availability": "live",
    "technicalReviewRecord": "/reviews/gravel-calculator.json",
    "qualifiedReview": "pending",
    "qualifiedReviewer": null,
    "qualifiedReviewDate": null,
    "formulaVersion": "20.13.0",
    "referenceCoverage": "references-listed",
    "releaseTestScope": "Catalog and regression checks are not a professional formula audit; consult release evidence.",
    "historicalMetadataDate": "2026-08-18",
    "historicalMetadataNotice": "The imported date is not evidence of a completed human review."
  },
  "notice": "Planning quantities and user-entered USD costs, not a contractor quote, structural design or code approval. Default prices are zero (unpriced); enter your supplier and labor quotes. New changes await independent review.",
  "urls": {
    "page": "/us/gravel/",
    "definition": "/us/gravel/definition.json",
    "schema": "/us/gravel/schema.json",
    "llms": "/us/gravel/llms.txt",
    "legacyDefinition": "/us/gravel/definition.json"
  },
  "queryExample": "https://askcalculators.com/us/gravel/?length=27&width=12&depth=1&wastePercent=0&density=100&unitCost=70&laborCost=100&deliveryCost=50&costSpreadPercent=15",
  "queryParameters": {
    "unitSystem": {
      "label": "Dimension units",
      "type": "select",
      "required": false,
      "default": "imperial"
    },
    "length": {
      "label": "Length (ft / m)",
      "type": "number",
      "required": false,
      "default": 20
    },
    "width": {
      "label": "Width (ft / m)",
      "type": "number",
      "required": false,
      "default": 10
    },
    "depth": {
      "label": "Depth (in / cm)",
      "type": "number",
      "required": false,
      "default": 4
    },
    "wastePercent": {
      "label": "Purchasing allowance (%)",
      "type": "number",
      "required": false,
      "default": 0
    },
    "density": {
      "label": "Entered density (lb/ft³)",
      "type": "number",
      "required": false,
      "default": 100
    },
    "unitCost": {
      "label": "Material price (USD / cubic yard)",
      "type": "money",
      "required": false,
      "default": 0
    },
    "laborCost": {
      "label": "Total labor allowance (USD)",
      "type": "money",
      "required": false,
      "default": 0
    },
    "deliveryCost": {
      "label": "Delivery allowance (USD)",
      "type": "money",
      "required": false,
      "default": 0
    },
    "costSpreadPercent": {
      "label": "Low/high variation around entered subtotal (%)",
      "type": "percent",
      "required": false,
      "default": 15
    }
  },
  "inputs": [
    {
      "id": "unitSystem",
      "label": "Dimension units",
      "type": "select",
      "defaultValue": "imperial",
      "options": [
        {
          "label": "US customary (ft, in)",
          "value": "imperial"
        },
        {
          "label": "Metric (m, cm)",
          "value": "metric"
        }
      ],
      "help": "Changing this selector converts dimensions already entered. Prices keep the purchasing unit printed beside each price."
    },
    {
      "id": "length",
      "label": "Length (ft / m)",
      "type": "number",
      "defaultValue": 20
    },
    {
      "id": "width",
      "label": "Width (ft / m)",
      "type": "number",
      "defaultValue": 10
    },
    {
      "id": "depth",
      "label": "Depth (in / cm)",
      "type": "number",
      "defaultValue": 4
    },
    {
      "id": "wastePercent",
      "label": "Purchasing allowance (%)",
      "type": "number",
      "defaultValue": 0,
      "min": 0,
      "step": 0.01,
      "max": 100
    },
    {
      "id": "density",
      "label": "Entered density (lb/ft³)",
      "type": "number",
      "defaultValue": 100,
      "min": 0,
      "step": 0.01,
      "help": "Illustrative default only. Replace with your supplier’s bulk density."
    },
    {
      "id": "unitCost",
      "label": "Material price (USD / cubic yard)",
      "type": "money",
      "defaultValue": 0,
      "min": 0,
      "step": 0.01,
      "help": "Zero means unpriced. Use a current supplier quote; do not treat zero as free."
    },
    {
      "id": "laborCost",
      "label": "Total labor allowance (USD)",
      "type": "money",
      "defaultValue": 0,
      "min": 0,
      "step": 0.01
    },
    {
      "id": "deliveryCost",
      "label": "Delivery allowance (USD)",
      "type": "money",
      "defaultValue": 0,
      "min": 0,
      "step": 0.01
    },
    {
      "id": "costSpreadPercent",
      "label": "Low/high variation around entered subtotal (%)",
      "type": "percent",
      "defaultValue": 15,
      "min": 0,
      "max": 100,
      "step": 1,
      "help": "A user-adjustable planning scenario, not a researched local price range."
    }
  ],
  "outputs": [
    {
      "id": "cubicYards",
      "label": "Order volume (yd³)",
      "format": "number",
      "primary": true,
      "digits": 3
    },
    {
      "id": "cubicMetres",
      "label": "Order volume (m³)",
      "format": "number",
      "digits": 3
    },
    {
      "id": "tons",
      "label": "US short tons using entered density",
      "format": "number",
      "digits": 3
    },
    {
      "id": "materialCost",
      "label": "Material cost",
      "format": "currency",
      "currency": "USD"
    },
    {
      "id": "laborCost",
      "label": "Labor allowance",
      "format": "currency",
      "currency": "USD"
    },
    {
      "id": "deliveryCost",
      "label": "Delivery allowance",
      "format": "currency",
      "currency": "USD"
    },
    {
      "id": "unitRate",
      "label": "Entered USD rate / cubic yard",
      "format": "currency",
      "currency": "USD"
    },
    {
      "id": "estimatedTotal",
      "label": "Entered subtotal",
      "format": "currency",
      "currency": "USD"
    },
    {
      "id": "costLow",
      "label": "Low budget scenario",
      "format": "currency",
      "currency": "USD"
    },
    {
      "id": "costMid",
      "label": "Middle budget scenario",
      "format": "currency",
      "currency": "USD"
    },
    {
      "id": "costHigh",
      "label": "High budget scenario",
      "format": "currency",
      "currency": "USD"
    },
    {
      "id": "pricingStatus",
      "label": "Pricing status",
      "format": "text"
    }
  ],
  "formula": {
    "expression": "Volume = area × depth; estimated weight = volume × selected gravel density.; material = unrounded purchase quantity × entered unit price; middle = material + labor + delivery; low/high = middle × (1 ∓ variation/100)"
  },
  "examples": [
    {
      "label": "Illustrative USD purchasing scenario",
      "inputs": {
        "length": 27,
        "width": 12,
        "depth": 1,
        "wastePercent": 0,
        "density": 100,
        "unitCost": 70,
        "laborCost": 100,
        "deliveryCost": 50,
        "costSpreadPercent": 15
      }
    }
  ],
  "sources": [
    {
      "label": "NIST SI conversion factors — accessed 10 September 2026",
      "url": "https://www.nist.gov/pml/special-publication-811/nist-guide-si-appendix-b-conversion-factors"
    },
    {
      "label": "NIST international-foot guidance — accessed 10 September 2026",
      "url": "https://www.nist.gov/pml/us-surveyfoot"
    }
  ],
  "publicSlug": "gravel",
  "namespace": "us",
  "countries": [
    "us"
  ]
}