{
  "entity_type": "unit_conversion_page",
  "id": "rankine-to-fahrenheit",
  "name": "Degrees Rankine to Degrees Fahrenheit",
  "title": "Degrees Rankine to Degrees Fahrenheit Converter (°R to °F)",
  "description": "Convert degrees Rankine to degrees Fahrenheit with the formula °F = °R − 459.67. Conversion table and worked examples, with JSON API and MCP access.",
  "quantity": "temperature",
  "quantity_name": "Temperature",
  "base_unit": "K",
  "from_unit": {
    "symbol": "R",
    "display": "°R",
    "name": "degrees Rankine",
    "singular": "degree Rankine"
  },
  "to_unit": {
    "symbol": "F",
    "display": "°F",
    "name": "degrees Fahrenheit",
    "singular": "degree Fahrenheit"
  },
  "linear": false,
  "factor": null,
  "inverse_factor": null,
  "formula": "°F = °R − 459.67",
  "reverse_formula": "°R = °F + 459.67",
  "unit_relation": "°F = °R − 459.67",
  "examples": [
    {
      "value": 300,
      "result": -159.67,
      "text": "300 °R = -159.67 °F"
    },
    {
      "value": 273.15,
      "result": -186.52,
      "text": "273.15 °R = -186.52 °F"
    },
    {
      "value": 0,
      "result": -459.67,
      "text": "0 °R = -459.67 °F"
    }
  ],
  "table": [
    {
      "R": 0,
      "F": -459.67
    },
    {
      "R": 50,
      "F": -409.67
    },
    {
      "R": 100,
      "F": -359.67
    },
    {
      "R": 150,
      "F": -309.67
    },
    {
      "R": 200,
      "F": -259.67
    },
    {
      "R": 250,
      "F": -209.67
    },
    {
      "R": 273.15,
      "F": -186.52
    },
    {
      "R": 293.15,
      "F": -166.52
    },
    {
      "R": 300,
      "F": -159.67
    },
    {
      "R": 310,
      "F": -149.67
    },
    {
      "R": 350,
      "F": -109.67
    },
    {
      "R": 373.15,
      "F": -86.52
    },
    {
      "R": 400,
      "F": -59.67
    },
    {
      "R": 500,
      "F": 40.33
    },
    {
      "R": 600,
      "F": 140.33
    },
    {
      "R": 800,
      "F": 340.33
    },
    {
      "R": 1000,
      "F": 540.33
    },
    {
      "R": 1500,
      "F": 1040.33
    },
    {
      "R": 2000,
      "F": 1540.33
    },
    {
      "R": 5000,
      "F": 4540.33
    }
  ],
  "faq": [
    {
      "q": "What is the formula to convert degrees Rankine to degrees Fahrenheit?",
      "a": "°F = °R − 459.67. For example, 300 °R = -159.67 °F."
    },
    {
      "q": "How do I convert degrees Fahrenheit back to degrees Rankine?",
      "a": "°R = °F + 459.67; the degrees Fahrenheit-to-degrees Rankine page applies it directly."
    },
    {
      "q": "Why is there no single multiplication factor?",
      "a": "Temperature scales have different zero points, so the conversion is an affine formula (scale and offset), not a plain multiplication."
    }
  ],
  "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=300&from_unit=R&to_unit=F",
    "calculator": "https://tttkmbb.com/api/v1/calculate/temperature?value=300&from_unit=R&to_unit=F",
    "mcp_tool": "convert_units",
    "mcp_arguments": {
      "value": 300,
      "from_unit": "R",
      "to_unit": "F"
    }
  },
  "links": {
    "html": "https://tttkmbb.com/conversion/rankine-to-fahrenheit",
    "markdown": "https://tttkmbb.com/conversion/rankine-to-fahrenheit.md",
    "json": "https://tttkmbb.com/conversion/rankine-to-fahrenheit.json",
    "reverse": "https://tttkmbb.com/conversion/fahrenheit-to-rankine",
    "quantity_converter": "https://tttkmbb.com/conversion/temperature",
    "units": "https://tttkmbb.com/api/v1/units?quantity=temperature"
  },
  "timestamp": "2026-09-24"
}