{
  "entity_type": "unit_conversion_page",
  "id": "lbs-to-tons",
  "name": "Pounds to US short tons",
  "title": "Pounds to US short tons Converter (lb to short ton)",
  "description": "Convert pounds to US short tons: 1 lb = 0.0005 short ton. Exact conversion factor, formula, 22-row table and worked examples, with JSON API and MCP access.",
  "quantity": "mass",
  "quantity_name": "Mass",
  "base_unit": "kg",
  "from_unit": {
    "symbol": "lb",
    "display": "lb",
    "name": "pounds",
    "singular": "pound"
  },
  "to_unit": {
    "symbol": "ton_us",
    "display": "short ton",
    "name": "US short tons",
    "singular": "short ton"
  },
  "linear": true,
  "factor": 0.0005,
  "inverse_factor": 2000,
  "formula": "US short tons = pounds × 0.0005",
  "reverse_formula": "pounds = US short tons × 2000",
  "unit_relation": "1 lb = 0.0005 short ton",
  "examples": [
    {
      "value": 5,
      "result": 0.0025,
      "text": "5 lb = 0.0025 short ton"
    },
    {
      "value": 12.5,
      "result": 0.00625,
      "text": "12.5 lb = 0.00625 short ton"
    },
    {
      "value": 100,
      "result": 0.05,
      "text": "100 lb = 0.05 short ton"
    }
  ],
  "table": [
    {
      "lb": 1,
      "ton_us": 0.0005
    },
    {
      "lb": 2,
      "ton_us": 0.001
    },
    {
      "lb": 3,
      "ton_us": 0.0015
    },
    {
      "lb": 4,
      "ton_us": 0.002
    },
    {
      "lb": 5,
      "ton_us": 0.0025
    },
    {
      "lb": 6,
      "ton_us": 0.003
    },
    {
      "lb": 7,
      "ton_us": 0.0035
    },
    {
      "lb": 8,
      "ton_us": 0.004
    },
    {
      "lb": 9,
      "ton_us": 0.0045
    },
    {
      "lb": 10,
      "ton_us": 0.005
    },
    {
      "lb": 15,
      "ton_us": 0.0075
    },
    {
      "lb": 20,
      "ton_us": 0.01
    },
    {
      "lb": 25,
      "ton_us": 0.0125
    },
    {
      "lb": 30,
      "ton_us": 0.015
    },
    {
      "lb": 40,
      "ton_us": 0.02
    },
    {
      "lb": 50,
      "ton_us": 0.025
    },
    {
      "lb": 75,
      "ton_us": 0.0375
    },
    {
      "lb": 100,
      "ton_us": 0.05
    },
    {
      "lb": 200,
      "ton_us": 0.1
    },
    {
      "lb": 250,
      "ton_us": 0.125
    },
    {
      "lb": 500,
      "ton_us": 0.25
    },
    {
      "lb": 1000,
      "ton_us": 0.5
    }
  ],
  "faq": [
    {
      "q": "How many US short tons are in one pound?",
      "a": "1 lb = 0.0005 short ton. 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 to US short tons?",
      "a": "Multiply the value in pounds by 0.0005: US short tons = pounds × 0.0005. For example, 5 lb = 0.0025 short ton."
    },
    {
      "q": "How do I convert US short tons back to pounds?",
      "a": "Multiply by the inverse factor 2000 (pounds = US short tons × 2000), or use the US short tons-to-pounds 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&to_unit=ton_us",
    "calculator": "https://tttkmbb.com/api/v1/calculate/mass?value=5&from_unit=lb&to_unit=ton_us",
    "mcp_tool": "convert_units",
    "mcp_arguments": {
      "value": 5,
      "from_unit": "lb",
      "to_unit": "ton_us"
    }
  },
  "links": {
    "html": "https://tttkmbb.com/conversion/lbs-to-tons",
    "markdown": "https://tttkmbb.com/conversion/lbs-to-tons.md",
    "json": "https://tttkmbb.com/conversion/lbs-to-tons.json",
    "reverse": "https://tttkmbb.com/conversion/tons-to-lbs",
    "quantity_converter": "https://tttkmbb.com/conversion/mass",
    "units": "https://tttkmbb.com/api/v1/units?quantity=mass"
  },
  "timestamp": "2026-09-24"
}