{
  "entity_type": "unit_conversion_page",
  "id": "lb-per-ft3-to-kg-per-m3",
  "name": "Pounds per cubic foot to Kilograms per cubic meter",
  "title": "Pounds per cubic foot to Kilograms per cubic meter Converter (lb/ft³ to kg/m³)",
  "description": "Convert pounds per cubic foot to kilograms per cubic meter: 1 lb/ft³ = 16.0185 kg/m³. Exact conversion factor, formula, 22-row table and worked examples, with JSON API and MCP access.",
  "quantity": "density",
  "quantity_name": "Density",
  "base_unit": "kg/m3",
  "from_unit": {
    "symbol": "lb/ft3",
    "display": "lb/ft³",
    "name": "pounds per cubic foot",
    "singular": "pound per cubic foot"
  },
  "to_unit": {
    "symbol": "kg/m3",
    "display": "kg/m³",
    "name": "kilograms per cubic meter",
    "singular": "kilogram per cubic meter"
  },
  "linear": true,
  "factor": 16.01846337,
  "inverse_factor": 0.06242796058,
  "formula": "kilograms per cubic meter = pounds per cubic foot × 16.01846337",
  "reverse_formula": "pounds per cubic foot = kilograms per cubic meter × 0.06242796058",
  "unit_relation": "1 lb/ft³ = 16.0185 kg/m³",
  "examples": [
    {
      "value": 5,
      "result": 80.0923,
      "text": "5 lb/ft³ = 80.0923 kg/m³"
    },
    {
      "value": 12.5,
      "result": 200.231,
      "text": "12.5 lb/ft³ = 200.231 kg/m³"
    },
    {
      "value": 100,
      "result": 1601.85,
      "text": "100 lb/ft³ = 1601.85 kg/m³"
    }
  ],
  "table": [
    {
      "lb/ft3": 1,
      "kg/m3": 16.0185
    },
    {
      "lb/ft3": 2,
      "kg/m3": 32.0369
    },
    {
      "lb/ft3": 3,
      "kg/m3": 48.0554
    },
    {
      "lb/ft3": 4,
      "kg/m3": 64.0739
    },
    {
      "lb/ft3": 5,
      "kg/m3": 80.0923
    },
    {
      "lb/ft3": 6,
      "kg/m3": 96.1108
    },
    {
      "lb/ft3": 7,
      "kg/m3": 112.129
    },
    {
      "lb/ft3": 8,
      "kg/m3": 128.148
    },
    {
      "lb/ft3": 9,
      "kg/m3": 144.166
    },
    {
      "lb/ft3": 10,
      "kg/m3": 160.185
    },
    {
      "lb/ft3": 15,
      "kg/m3": 240.277
    },
    {
      "lb/ft3": 20,
      "kg/m3": 320.369
    },
    {
      "lb/ft3": 25,
      "kg/m3": 400.462
    },
    {
      "lb/ft3": 30,
      "kg/m3": 480.554
    },
    {
      "lb/ft3": 40,
      "kg/m3": 640.739
    },
    {
      "lb/ft3": 50,
      "kg/m3": 800.923
    },
    {
      "lb/ft3": 75,
      "kg/m3": 1201.38
    },
    {
      "lb/ft3": 100,
      "kg/m3": 1601.85
    },
    {
      "lb/ft3": 200,
      "kg/m3": 3203.69
    },
    {
      "lb/ft3": 250,
      "kg/m3": 4004.62
    },
    {
      "lb/ft3": 500,
      "kg/m3": 8009.23
    },
    {
      "lb/ft3": 1000,
      "kg/m3": 16018.5
    }
  ],
  "faq": [
    {
      "q": "How many kilograms per cubic meter are in one pound per cubic foot?",
      "a": "1 lb/ft³ = 16.0185 kg/m³. The factor comes from the SI definitions of both units (NIST SP 811 / BIPM), so it is exact or correct to at least 10 significant figures."
    },
    {
      "q": "What is the formula to convert pounds per cubic foot to kilograms per cubic meter?",
      "a": "Multiply the value in pounds per cubic foot by 16.01846337: kilograms per cubic meter = pounds per cubic foot × 16.01846337. For example, 5 lb/ft³ = 80.0923 kg/m³."
    },
    {
      "q": "How do I convert kilograms per cubic meter back to pounds per cubic foot?",
      "a": "Multiply by the inverse factor 0.06242796058 (pounds per cubic foot = kilograms per cubic meter × 0.06242796058), or use the kilograms per cubic meter-to-pounds per cubic foot page."
    }
  ],
  "sources": [
    {
      "name": "NIST Special Publication 811 – Guide for the Use of the International System of Units (SI), Appendix B conversion factors",
      "url": "https://www.nist.gov/pml/special-publication-811",
      "type": "standard",
      "retrieved_at": "2026-09-24"
    },
    {
      "name": "BIPM – The International System of Units (SI Brochure, 9th edition)",
      "url": "https://www.bipm.org/en/publications/si-brochure",
      "type": "standard",
      "retrieved_at": "2026-09-24"
    },
    {
      "name": "Wikipedia – Conversion of units",
      "url": "https://en.wikipedia.org/wiki/Conversion_of_units",
      "type": "reference",
      "retrieved_at": "2026-09-24"
    }
  ],
  "freshness": {
    "type": "static",
    "max_age_seconds": null,
    "note": "Fixed conversion factors (NIST/BIPM definitions); results never go stale."
  },
  "api": {
    "convert": "https://tttkmbb.com/api/v1/convert?value=5&from_unit=lb%2Fft3&to_unit=kg%2Fm3",
    "calculator": "https://tttkmbb.com/api/v1/calculate/density?value=5&from_unit=lb%2Fft3&to_unit=kg%2Fm3",
    "mcp_tool": "convert_units",
    "mcp_arguments": {
      "value": 5,
      "from_unit": "lb/ft3",
      "to_unit": "kg/m3"
    }
  },
  "links": {
    "html": "https://tttkmbb.com/conversion/lb-per-ft3-to-kg-per-m3",
    "markdown": "https://tttkmbb.com/conversion/lb-per-ft3-to-kg-per-m3.md",
    "json": "https://tttkmbb.com/conversion/lb-per-ft3-to-kg-per-m3.json",
    "reverse": "https://tttkmbb.com/conversion/kg-per-m3-to-lb-per-ft3",
    "quantity_converter": "https://tttkmbb.com/conversion/density",
    "units": "https://tttkmbb.com/api/v1/units?quantity=density"
  },
  "timestamp": "2026-09-24"
}