{
  "entity_type": "unit_conversion_page",
  "id": "imperial-gallons-to-gallons",
  "name": "Imperial gallons to US gallons",
  "title": "Imperial gallons to US gallons Converter (gal (UK) to gal (US))",
  "description": "Convert imperial gallons to US gallons: 1 gal (UK) = 1.20095 gal (US). Exact conversion factor, formula, 22-row table and worked examples, with JSON API and MCP access.",
  "quantity": "volume",
  "quantity_name": "Volume",
  "base_unit": "L",
  "from_unit": {
    "symbol": "gal_uk",
    "display": "gal (UK)",
    "name": "imperial gallons",
    "singular": "imperial gallon"
  },
  "to_unit": {
    "symbol": "gal_us",
    "display": "gal (US)",
    "name": "US gallons",
    "singular": "gallon"
  },
  "linear": true,
  "factor": 1.200949926,
  "inverse_factor": 0.8326741846,
  "formula": "US gallons = imperial gallons × 1.200949926",
  "reverse_formula": "imperial gallons = US gallons × 0.8326741846",
  "unit_relation": "1 gal (UK) = 1.20095 gal (US)",
  "examples": [
    {
      "value": 5,
      "result": 6.00475,
      "text": "5 gal (UK) = 6.00475 gal (US)"
    },
    {
      "value": 12.5,
      "result": 15.0119,
      "text": "12.5 gal (UK) = 15.0119 gal (US)"
    },
    {
      "value": 100,
      "result": 120.095,
      "text": "100 gal (UK) = 120.095 gal (US)"
    }
  ],
  "table": [
    {
      "gal_uk": 1,
      "gal_us": 1.20095
    },
    {
      "gal_uk": 2,
      "gal_us": 2.4019
    },
    {
      "gal_uk": 3,
      "gal_us": 3.60285
    },
    {
      "gal_uk": 4,
      "gal_us": 4.8038
    },
    {
      "gal_uk": 5,
      "gal_us": 6.00475
    },
    {
      "gal_uk": 6,
      "gal_us": 7.2057
    },
    {
      "gal_uk": 7,
      "gal_us": 8.40665
    },
    {
      "gal_uk": 8,
      "gal_us": 9.6076
    },
    {
      "gal_uk": 9,
      "gal_us": 10.8085
    },
    {
      "gal_uk": 10,
      "gal_us": 12.0095
    },
    {
      "gal_uk": 15,
      "gal_us": 18.0142
    },
    {
      "gal_uk": 20,
      "gal_us": 24.019
    },
    {
      "gal_uk": 25,
      "gal_us": 30.0237
    },
    {
      "gal_uk": 30,
      "gal_us": 36.0285
    },
    {
      "gal_uk": 40,
      "gal_us": 48.038
    },
    {
      "gal_uk": 50,
      "gal_us": 60.0475
    },
    {
      "gal_uk": 75,
      "gal_us": 90.0712
    },
    {
      "gal_uk": 100,
      "gal_us": 120.095
    },
    {
      "gal_uk": 200,
      "gal_us": 240.19
    },
    {
      "gal_uk": 250,
      "gal_us": 300.237
    },
    {
      "gal_uk": 500,
      "gal_us": 600.475
    },
    {
      "gal_uk": 1000,
      "gal_us": 1200.95
    }
  ],
  "faq": [
    {
      "q": "How many US gallons are in one imperial gallon?",
      "a": "1 gal (UK) = 1.20095 gal (US). 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 imperial gallons to US gallons?",
      "a": "Multiply the value in imperial gallons by 1.200949926: US gallons = imperial gallons × 1.200949926. For example, 5 gal (UK) = 6.00475 gal (US)."
    },
    {
      "q": "How do I convert US gallons back to imperial gallons?",
      "a": "Multiply by the inverse factor 0.8326741846 (imperial gallons = US gallons × 0.8326741846), or use the US gallons-to-imperial gallons 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=gal_uk&to_unit=gal_us",
    "calculator": "https://tttkmbb.com/api/v1/calculate/volume?value=5&from_unit=gal_uk&to_unit=gal_us",
    "mcp_tool": "convert_units",
    "mcp_arguments": {
      "value": 5,
      "from_unit": "gal_uk",
      "to_unit": "gal_us"
    }
  },
  "links": {
    "html": "https://tttkmbb.com/conversion/imperial-gallons-to-gallons",
    "markdown": "https://tttkmbb.com/conversion/imperial-gallons-to-gallons.md",
    "json": "https://tttkmbb.com/conversion/imperial-gallons-to-gallons.json",
    "reverse": "https://tttkmbb.com/conversion/gallons-to-imperial-gallons",
    "quantity_converter": "https://tttkmbb.com/conversion/volume",
    "units": "https://tttkmbb.com/api/v1/units?quantity=volume"
  },
  "timestamp": "2026-09-24"
}