{
  "name": "Yard Material Coverage Data",
  "version": "1.1.0",
  "source": "https://yardmaterialtools.com/material-coverage-chart",
  "methodology": "https://github.com/demi-valerith/yard-material-coverage-data/blob/main/METHODOLOGY.md",
  "updated": "2026-07-15",
  "unitSystem": "US customary",
  "coverageByDepth": [
    { "depthInches": 1, "squareFeetPerCubicYard": 324 },
    { "depthInches": 2, "squareFeetPerCubicYard": 162 },
    { "depthInches": 3, "squareFeetPerCubicYard": 108 },
    { "depthInches": 4, "squareFeetPerCubicYard": 81 },
    { "depthInches": 6, "squareFeetPerCubicYard": 54 },
    { "depthInches": 12, "squareFeetPerCubicYard": 27 }
  ],
  "tonsPerCubicYard": [
    { "material": "Pea gravel", "minimum": 1.25, "maximum": 1.4 },
    { "material": "Crushed stone", "minimum": 1.35, "maximum": 1.55 },
    { "material": "River rock", "minimum": 1.35, "maximum": 1.6 },
    { "material": "Topsoil", "minimum": 0.9, "maximum": 1.3 },
    { "material": "Compost", "minimum": 0.45, "maximum": 0.8 },
    { "material": "Mulch", "minimum": 0.25, "maximum": 0.5 },
    { "material": "Sand", "minimum": 1.25, "maximum": 1.5 },
    { "material": "Fill dirt", "minimum": 1.0, "maximum": 1.4 }
  ],
  "bagsPerCubicYard": [
    { "bagCubicFeet": 0.5, "bags": 54 },
    { "bagCubicFeet": 0.75, "bags": 36 },
    { "bagCubicFeet": 1, "bags": 27 },
    { "bagCubicFeet": 1.5, "bags": 18 },
    { "bagCubicFeet": 2, "bags": 14 },
    { "bagCubicFeet": 3, "bags": 9 }
  ],
  "disclaimer": "Planning estimates only. Supplier density, moisture, compaction, gradation, and bag fill vary."
}