{
  "entity_type": "unit_conversion_page",
  "id": "ft-lbs-to-kgf-m",
  "name": "Pound-feet (ft-lb) to Kilogram-force meters",
  "title": "Pound-feet (ft-lb) to Kilogram-force meters Converter (lbf·ft to kgf·m)",
  "description": "Convert pound-feet (ft-lb) to kilogram-force meters: 1 lbf·ft = 0.138255 kgf·m. Exact conversion factor, formula, 22-row table and worked examples, with JSON API and MCP access.",
  "quantity": "torque",
  "quantity_name": "Torque",
  "base_unit": "Nm",
  "from_unit": {
    "symbol": "lbf_ft",
    "display": "lbf·ft",
    "name": "pound-feet (ft-lb)",
    "singular": "pound-foot"
  },
  "to_unit": {
    "symbol": "kgf_m",
    "display": "kgf·m",
    "name": "kilogram-force meters",
    "singular": "kilogram-force meter"
  },
  "linear": true,
  "factor": 0.1382549544,
  "inverse_factor": 7.233013851,
  "formula": "kilogram-force meters = pound-feet (ft-lb) × 0.1382549544",
  "reverse_formula": "pound-feet (ft-lb) = kilogram-force meters × 7.233013851",
  "unit_relation": "1 lbf·ft = 0.138255 kgf·m",
  "examples": [
    {
      "value": 5,
      "result": 0.691275,
      "text": "5 lbf·ft = 0.691275 kgf·m"
    },
    {
      "value": 12.5,
      "result": 1.72819,
      "text": "12.5 lbf·ft = 1.72819 kgf·m"
    },
    {
      "value": 100,
      "result": 13.8255,
      "text": "100 lbf·ft = 13.8255 kgf·m"
    }
  ],
  "table": [
    {
      "lbf_ft": 1,
      "kgf_m": 0.138255
    },
    {
      "lbf_ft": 2,
      "kgf_m": 0.27651
    },
    {
      "lbf_ft": 3,
      "kgf_m": 0.414765
    },
    {
      "lbf_ft": 4,
      "kgf_m": 0.55302
    },
    {
      "lbf_ft": 5,
      "kgf_m": 0.691275
    },
    {
      "lbf_ft": 6,
      "kgf_m": 0.82953
    },
    {
      "lbf_ft": 7,
      "kgf_m": 0.967785
    },
    {
      "lbf_ft": 8,
      "kgf_m": 1.10604
    },
    {
      "lbf_ft": 9,
      "kgf_m": 1.24429
    },
    {
      "lbf_ft": 10,
      "kgf_m": 1.38255
    },
    {
      "lbf_ft": 15,
      "kgf_m": 2.07382
    },
    {
      "lbf_ft": 20,
      "kgf_m": 2.7651
    },
    {
      "lbf_ft": 25,
      "kgf_m": 3.45637
    },
    {
      "lbf_ft": 30,
      "kgf_m": 4.14765
    },
    {
      "lbf_ft": 40,
      "kgf_m": 5.5302
    },
    {
      "lbf_ft": 50,
      "kgf_m": 6.91275
    },
    {
      "lbf_ft": 75,
      "kgf_m": 10.3691
    },
    {
      "lbf_ft": 100,
      "kgf_m": 13.8255
    },
    {
      "lbf_ft": 200,
      "kgf_m": 27.651
    },
    {
      "lbf_ft": 250,
      "kgf_m": 34.5637
    },
    {
      "lbf_ft": 500,
      "kgf_m": 69.1275
    },
    {
      "lbf_ft": 1000,
      "kgf_m": 138.255
    }
  ],
  "faq": [
    {
      "q": "How many kilogram-force meters are in one pound-foot?",
      "a": "1 lbf·ft = 0.138255 kgf·m. 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 pound-feet (ft-lb) to kilogram-force meters?",
      "a": "Multiply the value in pound-feet (ft-lb) by 0.1382549544: kilogram-force meters = pound-feet (ft-lb) × 0.1382549544. For example, 5 lbf·ft = 0.691275 kgf·m."
    },
    {
      "q": "How do I convert kilogram-force meters back to pound-feet (ft-lb)?",
      "a": "Multiply by the inverse factor 7.233013851 (pound-feet (ft-lb) = kilogram-force meters × 7.233013851), or use the kilogram-force meters-to-pound-feet (ft-lb) 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=lbf_ft&to_unit=kgf_m",
    "calculator": "https://tttkmbb.com/api/v1/calculate/torque?value=5&from_unit=lbf_ft&to_unit=kgf_m",
    "mcp_tool": "convert_units",
    "mcp_arguments": {
      "value": 5,
      "from_unit": "lbf_ft",
      "to_unit": "kgf_m"
    }
  },
  "links": {
    "html": "https://tttkmbb.com/conversion/ft-lbs-to-kgf-m",
    "markdown": "https://tttkmbb.com/conversion/ft-lbs-to-kgf-m.md",
    "json": "https://tttkmbb.com/conversion/ft-lbs-to-kgf-m.json",
    "reverse": "https://tttkmbb.com/conversion/kgf-m-to-ft-lbs",
    "quantity_converter": "https://tttkmbb.com/conversion/torque",
    "units": "https://tttkmbb.com/api/v1/units?quantity=torque"
  },
  "timestamp": "2026-09-24"
}