{
  "entity_type": "unit_conversion_page",
  "id": "mj-to-kwh",
  "name": "Megajoules to Kilowatt-hours",
  "title": "Megajoules to Kilowatt-hours Converter (MJ to kWh)",
  "description": "Convert megajoules to kilowatt-hours: 1 MJ = 0.277778 kWh. 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": "MJ",
    "display": "MJ",
    "name": "megajoules",
    "singular": "megajoule"
  },
  "to_unit": {
    "symbol": "kWh",
    "display": "kWh",
    "name": "kilowatt-hours",
    "singular": "kilowatt-hour"
  },
  "linear": true,
  "factor": 0.2777777778,
  "inverse_factor": 3.6,
  "formula": "kilowatt-hours = megajoules × 0.2777777778",
  "reverse_formula": "megajoules = kilowatt-hours × 3.6",
  "unit_relation": "1 MJ = 0.277778 kWh",
  "examples": [
    {
      "value": 5,
      "result": 1.38889,
      "text": "5 MJ = 1.38889 kWh"
    },
    {
      "value": 12.5,
      "result": 3.47222,
      "text": "12.5 MJ = 3.47222 kWh"
    },
    {
      "value": 100,
      "result": 27.7778,
      "text": "100 MJ = 27.7778 kWh"
    }
  ],
  "table": [
    {
      "MJ": 1,
      "kWh": 0.277778
    },
    {
      "MJ": 2,
      "kWh": 0.555556
    },
    {
      "MJ": 3,
      "kWh": 0.833333
    },
    {
      "MJ": 4,
      "kWh": 1.11111
    },
    {
      "MJ": 5,
      "kWh": 1.38889
    },
    {
      "MJ": 6,
      "kWh": 1.66667
    },
    {
      "MJ": 7,
      "kWh": 1.94444
    },
    {
      "MJ": 8,
      "kWh": 2.22222
    },
    {
      "MJ": 9,
      "kWh": 2.5
    },
    {
      "MJ": 10,
      "kWh": 2.77778
    },
    {
      "MJ": 15,
      "kWh": 4.16667
    },
    {
      "MJ": 20,
      "kWh": 5.55556
    },
    {
      "MJ": 25,
      "kWh": 6.94444
    },
    {
      "MJ": 30,
      "kWh": 8.33333
    },
    {
      "MJ": 40,
      "kWh": 11.1111
    },
    {
      "MJ": 50,
      "kWh": 13.8889
    },
    {
      "MJ": 75,
      "kWh": 20.8333
    },
    {
      "MJ": 100,
      "kWh": 27.7778
    },
    {
      "MJ": 200,
      "kWh": 55.5556
    },
    {
      "MJ": 250,
      "kWh": 69.4444
    },
    {
      "MJ": 500,
      "kWh": 138.889
    },
    {
      "MJ": 1000,
      "kWh": 277.778
    }
  ],
  "faq": [
    {
      "q": "How many kilowatt-hours are in one megajoule?",
      "a": "1 MJ = 0.277778 kWh. 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 megajoules to kilowatt-hours?",
      "a": "Multiply the value in megajoules by 0.2777777778: kilowatt-hours = megajoules × 0.2777777778. For example, 5 MJ = 1.38889 kWh."
    },
    {
      "q": "How do I convert kilowatt-hours back to megajoules?",
      "a": "Multiply by the inverse factor 3.6 (megajoules = kilowatt-hours × 3.6), or use the kilowatt-hours-to-megajoules 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=MJ&to_unit=kWh",
    "calculator": "https://tttkmbb.com/api/v1/calculate/energy?value=5&from_unit=MJ&to_unit=kWh",
    "mcp_tool": "convert_units",
    "mcp_arguments": {
      "value": 5,
      "from_unit": "MJ",
      "to_unit": "kWh"
    }
  },
  "links": {
    "html": "https://tttkmbb.com/conversion/mj-to-kwh",
    "markdown": "https://tttkmbb.com/conversion/mj-to-kwh.md",
    "json": "https://tttkmbb.com/conversion/mj-to-kwh.json",
    "reverse": "https://tttkmbb.com/conversion/kwh-to-mj",
    "quantity_converter": "https://tttkmbb.com/conversion/energy",
    "units": "https://tttkmbb.com/api/v1/units?quantity=energy"
  },
  "timestamp": "2026-09-24"
}