{
  "entity_type": "unit_conversion_page",
  "id": "fahrenheit-to-kelvin",
  "name": "Degrees Fahrenheit to Kelvin",
  "title": "Degrees Fahrenheit to Kelvin Converter (°F to K)",
  "description": "Convert degrees Fahrenheit to kelvin with the formula K = (°F + 459.67) × 5/9. Conversion table and worked examples, with JSON API and MCP access.",
  "quantity": "temperature",
  "quantity_name": "Temperature",
  "base_unit": "K",
  "from_unit": {
    "symbol": "F",
    "display": "°F",
    "name": "degrees Fahrenheit",
    "singular": "degree Fahrenheit"
  },
  "to_unit": {
    "symbol": "K",
    "display": "K",
    "name": "kelvin",
    "singular": "kelvin"
  },
  "linear": false,
  "factor": null,
  "inverse_factor": null,
  "formula": "K = (°F + 459.67) × 5/9",
  "reverse_formula": "°F = K × 9/5 − 459.67",
  "unit_relation": "K = (°F + 459.67) × 5/9",
  "examples": [
    {
      "value": 37,
      "result": 275.928,
      "text": "37 °F = 275.928 K"
    },
    {
      "value": 100,
      "result": 310.928,
      "text": "100 °F = 310.928 K"
    },
    {
      "value": -40,
      "result": 233.15,
      "text": "-40 °F = 233.15 K"
    }
  ],
  "table": [
    {
      "F": -40,
      "K": 233.15
    },
    {
      "F": -30,
      "K": 238.706
    },
    {
      "F": -20,
      "K": 244.261
    },
    {
      "F": -10,
      "K": 249.817
    },
    {
      "F": 0,
      "K": 255.372
    },
    {
      "F": 5,
      "K": 258.15
    },
    {
      "F": 10,
      "K": 260.928
    },
    {
      "F": 15,
      "K": 263.706
    },
    {
      "F": 20,
      "K": 266.483
    },
    {
      "F": 25,
      "K": 269.261
    },
    {
      "F": 30,
      "K": 272.039
    },
    {
      "F": 35,
      "K": 274.817
    },
    {
      "F": 37,
      "K": 275.928
    },
    {
      "F": 40,
      "K": 277.594
    },
    {
      "F": 50,
      "K": 283.15
    },
    {
      "F": 60,
      "K": 288.706
    },
    {
      "F": 70,
      "K": 294.261
    },
    {
      "F": 80,
      "K": 299.817
    },
    {
      "F": 90,
      "K": 305.372
    },
    {
      "F": 100,
      "K": 310.928
    },
    {
      "F": 150,
      "K": 338.706
    },
    {
      "F": 200,
      "K": 366.483
    }
  ],
  "faq": [
    {
      "q": "What is the formula to convert degrees Fahrenheit to kelvin?",
      "a": "K = (°F + 459.67) × 5/9. For example, 37 °F = 275.928 K."
    },
    {
      "q": "How do I convert kelvin back to degrees Fahrenheit?",
      "a": "°F = K × 9/5 − 459.67; the kelvin-to-degrees Fahrenheit 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=37&from_unit=F&to_unit=K",
    "calculator": "https://tttkmbb.com/api/v1/calculate/temperature?value=37&from_unit=F&to_unit=K",
    "mcp_tool": "convert_units",
    "mcp_arguments": {
      "value": 37,
      "from_unit": "F",
      "to_unit": "K"
    }
  },
  "links": {
    "html": "https://tttkmbb.com/conversion/fahrenheit-to-kelvin",
    "markdown": "https://tttkmbb.com/conversion/fahrenheit-to-kelvin.md",
    "json": "https://tttkmbb.com/conversion/fahrenheit-to-kelvin.json",
    "reverse": "https://tttkmbb.com/conversion/kelvin-to-fahrenheit",
    "quantity_converter": "https://tttkmbb.com/conversion/temperature",
    "units": "https://tttkmbb.com/api/v1/units?quantity=temperature"
  },
  "timestamp": "2026-09-24"
}