{
  "entity_type": "unit_conversion_page",
  "id": "kj-to-kcal",
  "name": "Kilojoules to Kilocalories (food calories)",
  "title": "Kilojoules to Kilocalories (food calories) Converter (kJ to kcal)",
  "description": "Convert kilojoules to kilocalories (food calories): 1 kJ = 0.239006 kcal. Exact conversion factor, formula, 22-row table and worked examples, with JSON API and MCP access.",
  "quantity": "energy",
  "quantity_name": "Energy",
  "base_unit": "J",
  "from_unit": {
    "symbol": "kJ",
    "display": "kJ",
    "name": "kilojoules",
    "singular": "kilojoule"
  },
  "to_unit": {
    "symbol": "kcal",
    "display": "kcal",
    "name": "kilocalories (food calories)",
    "singular": "kilocalorie"
  },
  "linear": true,
  "factor": 0.2390057361,
  "inverse_factor": 4.184,
  "formula": "kilocalories (food calories) = kilojoules × 0.2390057361",
  "reverse_formula": "kilojoules = kilocalories (food calories) × 4.184",
  "unit_relation": "1 kJ = 0.239006 kcal",
  "examples": [
    {
      "value": 5,
      "result": 1.19503,
      "text": "5 kJ = 1.19503 kcal"
    },
    {
      "value": 12.5,
      "result": 2.98757,
      "text": "12.5 kJ = 2.98757 kcal"
    },
    {
      "value": 100,
      "result": 23.9006,
      "text": "100 kJ = 23.9006 kcal"
    }
  ],
  "table": [
    {
      "kJ": 1,
      "kcal": 0.239006
    },
    {
      "kJ": 2,
      "kcal": 0.478011
    },
    {
      "kJ": 3,
      "kcal": 0.717017
    },
    {
      "kJ": 4,
      "kcal": 0.956023
    },
    {
      "kJ": 5,
      "kcal": 1.19503
    },
    {
      "kJ": 6,
      "kcal": 1.43403
    },
    {
      "kJ": 7,
      "kcal": 1.67304
    },
    {
      "kJ": 8,
      "kcal": 1.91205
    },
    {
      "kJ": 9,
      "kcal": 2.15105
    },
    {
      "kJ": 10,
      "kcal": 2.39006
    },
    {
      "kJ": 15,
      "kcal": 3.58509
    },
    {
      "kJ": 20,
      "kcal": 4.78011
    },
    {
      "kJ": 25,
      "kcal": 5.97514
    },
    {
      "kJ": 30,
      "kcal": 7.17017
    },
    {
      "kJ": 40,
      "kcal": 9.56023
    },
    {
      "kJ": 50,
      "kcal": 11.9503
    },
    {
      "kJ": 75,
      "kcal": 17.9254
    },
    {
      "kJ": 100,
      "kcal": 23.9006
    },
    {
      "kJ": 200,
      "kcal": 47.8011
    },
    {
      "kJ": 250,
      "kcal": 59.7514
    },
    {
      "kJ": 500,
      "kcal": 119.503
    },
    {
      "kJ": 1000,
      "kcal": 239.006
    }
  ],
  "faq": [
    {
      "q": "How many kilocalories (food calories) are in one kilojoule?",
      "a": "1 kJ = 0.239006 kcal. 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 kilojoules to kilocalories (food calories)?",
      "a": "Multiply the value in kilojoules by 0.2390057361: kilocalories (food calories) = kilojoules × 0.2390057361. For example, 5 kJ = 1.19503 kcal."
    },
    {
      "q": "How do I convert kilocalories (food calories) back to kilojoules?",
      "a": "Multiply by the inverse factor 4.184 (kilojoules = kilocalories (food calories) × 4.184), or use the kilocalories (food calories)-to-kilojoules 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=kJ&to_unit=kcal",
    "calculator": "https://tttkmbb.com/api/v1/calculate/energy?value=5&from_unit=kJ&to_unit=kcal",
    "mcp_tool": "convert_units",
    "mcp_arguments": {
      "value": 5,
      "from_unit": "kJ",
      "to_unit": "kcal"
    }
  },
  "links": {
    "html": "https://tttkmbb.com/conversion/kj-to-kcal",
    "markdown": "https://tttkmbb.com/conversion/kj-to-kcal.md",
    "json": "https://tttkmbb.com/conversion/kj-to-kcal.json",
    "reverse": "https://tttkmbb.com/conversion/kcal-to-kj",
    "quantity_converter": "https://tttkmbb.com/conversion/energy",
    "units": "https://tttkmbb.com/api/v1/units?quantity=energy"
  },
  "timestamp": "2026-09-24"
}