{
  "entity_type": "unit_conversion_page",
  "id": "mpg-to-km-per-liter",
  "name": "Miles per US gallon (mpg) to Kilometers per liter",
  "title": "Miles per US gallon (mpg) to Kilometers per liter Converter (mpg (US) to km/L)",
  "description": "Convert miles per US gallon (mpg) to kilometers per liter with the formula km/L = mpg (US) × 0.425144. Conversion table and worked examples, with JSON API and MCP access.",
  "quantity": "fuel-economy",
  "quantity_name": "Fuel economy",
  "base_unit": "L/100km",
  "from_unit": {
    "symbol": "mpg_us",
    "display": "mpg (US)",
    "name": "miles per US gallon (mpg)",
    "singular": "mpg (US)"
  },
  "to_unit": {
    "symbol": "km/L",
    "display": "km/L",
    "name": "kilometers per liter",
    "singular": "kilometer per liter"
  },
  "linear": false,
  "factor": null,
  "inverse_factor": null,
  "formula": "km/L = mpg (US) × 0.425144",
  "reverse_formula": "mpg (US) = km/L × 2.352146",
  "unit_relation": "km/L = mpg (US) × 0.425144",
  "examples": [
    {
      "value": 7.5,
      "result": 3.18858,
      "text": "7.5 mpg (US) = 3.18858 km/L"
    },
    {
      "value": 30,
      "result": 12.7543,
      "text": "30 mpg (US) = 12.7543 km/L"
    },
    {
      "value": 45,
      "result": 19.1315,
      "text": "45 mpg (US) = 19.1315 km/L"
    }
  ],
  "table": [
    {
      "mpg_us": 3,
      "km/L": 1.27543
    },
    {
      "mpg_us": 4,
      "km/L": 1.70057
    },
    {
      "mpg_us": 5,
      "km/L": 2.12572
    },
    {
      "mpg_us": 6,
      "km/L": 2.55086
    },
    {
      "mpg_us": 7,
      "km/L": 2.97601
    },
    {
      "mpg_us": 8,
      "km/L": 3.40115
    },
    {
      "mpg_us": 9,
      "km/L": 3.82629
    },
    {
      "mpg_us": 10,
      "km/L": 4.25144
    },
    {
      "mpg_us": 12,
      "km/L": 5.10172
    },
    {
      "mpg_us": 15,
      "km/L": 6.37716
    },
    {
      "mpg_us": 20,
      "km/L": 8.50287
    },
    {
      "mpg_us": 25,
      "km/L": 10.6286
    },
    {
      "mpg_us": 30,
      "km/L": 12.7543
    },
    {
      "mpg_us": 35,
      "km/L": 14.88
    },
    {
      "mpg_us": 40,
      "km/L": 17.0057
    },
    {
      "mpg_us": 45,
      "km/L": 19.1315
    },
    {
      "mpg_us": 50,
      "km/L": 21.2572
    },
    {
      "mpg_us": 60,
      "km/L": 25.5086
    },
    {
      "mpg_us": 70,
      "km/L": 29.7601
    },
    {
      "mpg_us": 80,
      "km/L": 34.0115
    },
    {
      "mpg_us": 100,
      "km/L": 42.5144
    }
  ],
  "faq": [
    {
      "q": "What is the formula to convert miles per US gallon (mpg) to kilometers per liter?",
      "a": "km/L = mpg (US) × 0.425144. For example, 7.5 mpg (US) = 3.18858 km/L."
    },
    {
      "q": "How do I convert kilometers per liter back to miles per US gallon (mpg)?",
      "a": "mpg (US) = km/L × 2.352146; the kilometers per liter-to-miles per US gallon (mpg) page applies it directly."
    },
    {
      "q": "Why is there no single multiplication factor?",
      "a": "Fuel-economy units are reciprocal (distance per volume versus volume per distance), so the conversion divides a constant by the value instead of multiplying."
    }
  ],
  "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=7.5&from_unit=mpg_us&to_unit=km%2FL",
    "calculator": "https://tttkmbb.com/api/v1/calculate/fuel-economy?value=7.5&from_unit=mpg_us&to_unit=km%2FL",
    "mcp_tool": "convert_units",
    "mcp_arguments": {
      "value": 7.5,
      "from_unit": "mpg_us",
      "to_unit": "km/L"
    }
  },
  "links": {
    "html": "https://tttkmbb.com/conversion/mpg-to-km-per-liter",
    "markdown": "https://tttkmbb.com/conversion/mpg-to-km-per-liter.md",
    "json": "https://tttkmbb.com/conversion/mpg-to-km-per-liter.json",
    "reverse": "https://tttkmbb.com/conversion/km-per-liter-to-mpg",
    "quantity_converter": "https://tttkmbb.com/conversion/fuel-economy",
    "units": "https://tttkmbb.com/api/v1/units?quantity=fuel-economy"
  },
  "timestamp": "2026-09-24"
}