{
  "entity_type": "unit_conversion_page",
  "id": "ft-lbs-to-in-lbs",
  "name": "Pound-feet (ft-lb) to Pound-inches (in-lb)",
  "title": "Pound-feet (ft-lb) to Pound-inches (in-lb) Converter (lbf·ft to lbf·in)",
  "description": "Convert pound-feet (ft-lb) to pound-inches (in-lb): 1 lbf·ft = 12 lbf·in. 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": "lbf_in",
    "display": "lbf·in",
    "name": "pound-inches (in-lb)",
    "singular": "pound-inch"
  },
  "linear": true,
  "factor": 12,
  "inverse_factor": 0.08333333333,
  "formula": "pound-inches (in-lb) = pound-feet (ft-lb) × 12",
  "reverse_formula": "pound-feet (ft-lb) = pound-inches (in-lb) × 0.08333333333",
  "unit_relation": "1 lbf·ft = 12 lbf·in",
  "examples": [
    {
      "value": 5,
      "result": 60,
      "text": "5 lbf·ft = 60 lbf·in"
    },
    {
      "value": 12.5,
      "result": 150,
      "text": "12.5 lbf·ft = 150 lbf·in"
    },
    {
      "value": 100,
      "result": 1200,
      "text": "100 lbf·ft = 1200 lbf·in"
    }
  ],
  "table": [
    {
      "lbf_ft": 1,
      "lbf_in": 12
    },
    {
      "lbf_ft": 2,
      "lbf_in": 24
    },
    {
      "lbf_ft": 3,
      "lbf_in": 36
    },
    {
      "lbf_ft": 4,
      "lbf_in": 48
    },
    {
      "lbf_ft": 5,
      "lbf_in": 60
    },
    {
      "lbf_ft": 6,
      "lbf_in": 72
    },
    {
      "lbf_ft": 7,
      "lbf_in": 84
    },
    {
      "lbf_ft": 8,
      "lbf_in": 96
    },
    {
      "lbf_ft": 9,
      "lbf_in": 108
    },
    {
      "lbf_ft": 10,
      "lbf_in": 120
    },
    {
      "lbf_ft": 15,
      "lbf_in": 180
    },
    {
      "lbf_ft": 20,
      "lbf_in": 240
    },
    {
      "lbf_ft": 25,
      "lbf_in": 300
    },
    {
      "lbf_ft": 30,
      "lbf_in": 360
    },
    {
      "lbf_ft": 40,
      "lbf_in": 480
    },
    {
      "lbf_ft": 50,
      "lbf_in": 600
    },
    {
      "lbf_ft": 75,
      "lbf_in": 900
    },
    {
      "lbf_ft": 100,
      "lbf_in": 1200
    },
    {
      "lbf_ft": 200,
      "lbf_in": 2400
    },
    {
      "lbf_ft": 250,
      "lbf_in": 3000
    },
    {
      "lbf_ft": 500,
      "lbf_in": 6000
    },
    {
      "lbf_ft": 1000,
      "lbf_in": 12000
    }
  ],
  "faq": [
    {
      "q": "How many pound-inches (in-lb) are in one pound-foot?",
      "a": "1 lbf·ft = 12 lbf·in. 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 pound-inches (in-lb)?",
      "a": "Multiply the value in pound-feet (ft-lb) by 12: pound-inches (in-lb) = pound-feet (ft-lb) × 12. For example, 5 lbf·ft = 60 lbf·in."
    },
    {
      "q": "How do I convert pound-inches (in-lb) back to pound-feet (ft-lb)?",
      "a": "Multiply by the inverse factor 0.08333333333 (pound-feet (ft-lb) = pound-inches (in-lb) × 0.08333333333), or use the pound-inches (in-lb)-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=lbf_in",
    "calculator": "https://tttkmbb.com/api/v1/calculate/torque?value=5&from_unit=lbf_ft&to_unit=lbf_in",
    "mcp_tool": "convert_units",
    "mcp_arguments": {
      "value": 5,
      "from_unit": "lbf_ft",
      "to_unit": "lbf_in"
    }
  },
  "links": {
    "html": "https://tttkmbb.com/conversion/ft-lbs-to-in-lbs",
    "markdown": "https://tttkmbb.com/conversion/ft-lbs-to-in-lbs.md",
    "json": "https://tttkmbb.com/conversion/ft-lbs-to-in-lbs.json",
    "reverse": "https://tttkmbb.com/conversion/in-lbs-to-ft-lbs",
    "quantity_converter": "https://tttkmbb.com/conversion/torque",
    "units": "https://tttkmbb.com/api/v1/units?quantity=torque"
  },
  "timestamp": "2026-09-24"
}