{
  "entity_type": "unit_conversion_page",
  "id": "ft-lbs-to-newton-meters",
  "name": "Pound-feet (ft-lb) to Newton-meters",
  "title": "Pound-feet (ft-lb) to Newton-meters Converter (lbf·ft to N·m)",
  "description": "Convert pound-feet (ft-lb) to newton-meters: 1 lbf·ft = 1.35582 N·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": "Nm",
    "display": "N·m",
    "name": "newton-meters",
    "singular": "newton-meter"
  },
  "linear": true,
  "factor": 1.355817948,
  "inverse_factor": 0.7375621493,
  "formula": "newton-meters = pound-feet (ft-lb) × 1.355817948",
  "reverse_formula": "pound-feet (ft-lb) = newton-meters × 0.7375621493",
  "unit_relation": "1 lbf·ft = 1.35582 N·m",
  "examples": [
    {
      "value": 5,
      "result": 6.77909,
      "text": "5 lbf·ft = 6.77909 N·m"
    },
    {
      "value": 12.5,
      "result": 16.9477,
      "text": "12.5 lbf·ft = 16.9477 N·m"
    },
    {
      "value": 100,
      "result": 135.582,
      "text": "100 lbf·ft = 135.582 N·m"
    }
  ],
  "table": [
    {
      "lbf_ft": 1,
      "Nm": 1.35582
    },
    {
      "lbf_ft": 2,
      "Nm": 2.71164
    },
    {
      "lbf_ft": 3,
      "Nm": 4.06745
    },
    {
      "lbf_ft": 4,
      "Nm": 5.42327
    },
    {
      "lbf_ft": 5,
      "Nm": 6.77909
    },
    {
      "lbf_ft": 6,
      "Nm": 8.13491
    },
    {
      "lbf_ft": 7,
      "Nm": 9.49073
    },
    {
      "lbf_ft": 8,
      "Nm": 10.8465
    },
    {
      "lbf_ft": 9,
      "Nm": 12.2024
    },
    {
      "lbf_ft": 10,
      "Nm": 13.5582
    },
    {
      "lbf_ft": 15,
      "Nm": 20.3373
    },
    {
      "lbf_ft": 20,
      "Nm": 27.1164
    },
    {
      "lbf_ft": 25,
      "Nm": 33.8954
    },
    {
      "lbf_ft": 30,
      "Nm": 40.6745
    },
    {
      "lbf_ft": 40,
      "Nm": 54.2327
    },
    {
      "lbf_ft": 50,
      "Nm": 67.7909
    },
    {
      "lbf_ft": 75,
      "Nm": 101.686
    },
    {
      "lbf_ft": 100,
      "Nm": 135.582
    },
    {
      "lbf_ft": 200,
      "Nm": 271.164
    },
    {
      "lbf_ft": 250,
      "Nm": 338.954
    },
    {
      "lbf_ft": 500,
      "Nm": 677.909
    },
    {
      "lbf_ft": 1000,
      "Nm": 1355.82
    }
  ],
  "faq": [
    {
      "q": "How many newton-meters are in one pound-foot?",
      "a": "1 lbf·ft = 1.35582 N·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 newton-meters?",
      "a": "Multiply the value in pound-feet (ft-lb) by 1.355817948: newton-meters = pound-feet (ft-lb) × 1.355817948. For example, 5 lbf·ft = 6.77909 N·m."
    },
    {
      "q": "How do I convert newton-meters back to pound-feet (ft-lb)?",
      "a": "Multiply by the inverse factor 0.7375621493 (pound-feet (ft-lb) = newton-meters × 0.7375621493), or use the newton-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=Nm",
    "calculator": "https://tttkmbb.com/api/v1/calculate/torque?value=5&from_unit=lbf_ft&to_unit=Nm",
    "mcp_tool": "convert_units",
    "mcp_arguments": {
      "value": 5,
      "from_unit": "lbf_ft",
      "to_unit": "Nm"
    }
  },
  "links": {
    "html": "https://tttkmbb.com/conversion/ft-lbs-to-newton-meters",
    "markdown": "https://tttkmbb.com/conversion/ft-lbs-to-newton-meters.md",
    "json": "https://tttkmbb.com/conversion/ft-lbs-to-newton-meters.json",
    "reverse": "https://tttkmbb.com/conversion/newton-meters-to-ft-lbs",
    "quantity_converter": "https://tttkmbb.com/conversion/torque",
    "units": "https://tttkmbb.com/api/v1/units?quantity=torque"
  },
  "timestamp": "2026-09-24"
}