{
  "entity_type": "unit_conversion_page",
  "id": "gallons-to-cubic-feet",
  "name": "US gallons to Cubic feet",
  "title": "US gallons to Cubic feet Converter (gal (US) to ft³)",
  "description": "Convert US gallons to cubic feet: 1 gal (US) = 0.133681 ft³. 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_us",
    "display": "gal (US)",
    "name": "US gallons",
    "singular": "gallon"
  },
  "to_unit": {
    "symbol": "ft3",
    "display": "ft³",
    "name": "cubic feet",
    "singular": "cubic foot"
  },
  "linear": true,
  "factor": 0.1336805556,
  "inverse_factor": 7.480519481,
  "formula": "cubic feet = US gallons × 0.1336805556",
  "reverse_formula": "US gallons = cubic feet × 7.480519481",
  "unit_relation": "1 gal (US) = 0.133681 ft³",
  "examples": [
    {
      "value": 5,
      "result": 0.668403,
      "text": "5 gal (US) = 0.668403 ft³"
    },
    {
      "value": 12.5,
      "result": 1.67101,
      "text": "12.5 gal (US) = 1.67101 ft³"
    },
    {
      "value": 100,
      "result": 13.3681,
      "text": "100 gal (US) = 13.3681 ft³"
    }
  ],
  "table": [
    {
      "gal_us": 1,
      "ft3": 0.133681
    },
    {
      "gal_us": 2,
      "ft3": 0.267361
    },
    {
      "gal_us": 3,
      "ft3": 0.401042
    },
    {
      "gal_us": 4,
      "ft3": 0.534722
    },
    {
      "gal_us": 5,
      "ft3": 0.668403
    },
    {
      "gal_us": 6,
      "ft3": 0.802083
    },
    {
      "gal_us": 7,
      "ft3": 0.935764
    },
    {
      "gal_us": 8,
      "ft3": 1.06944
    },
    {
      "gal_us": 9,
      "ft3": 1.20312
    },
    {
      "gal_us": 10,
      "ft3": 1.33681
    },
    {
      "gal_us": 15,
      "ft3": 2.00521
    },
    {
      "gal_us": 20,
      "ft3": 2.67361
    },
    {
      "gal_us": 25,
      "ft3": 3.34201
    },
    {
      "gal_us": 30,
      "ft3": 4.01042
    },
    {
      "gal_us": 40,
      "ft3": 5.34722
    },
    {
      "gal_us": 50,
      "ft3": 6.68403
    },
    {
      "gal_us": 75,
      "ft3": 10.026
    },
    {
      "gal_us": 100,
      "ft3": 13.3681
    },
    {
      "gal_us": 200,
      "ft3": 26.7361
    },
    {
      "gal_us": 250,
      "ft3": 33.4201
    },
    {
      "gal_us": 500,
      "ft3": 66.8403
    },
    {
      "gal_us": 1000,
      "ft3": 133.681
    }
  ],
  "faq": [
    {
      "q": "How many cubic feet are in one gallon?",
      "a": "1 gal (US) = 0.133681 ft³. 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 US gallons to cubic feet?",
      "a": "Multiply the value in US gallons by 0.1336805556: cubic feet = US gallons × 0.1336805556. For example, 5 gal (US) = 0.668403 ft³."
    },
    {
      "q": "How do I convert cubic feet back to US gallons?",
      "a": "Multiply by the inverse factor 7.480519481 (US gallons = cubic feet × 7.480519481), or use the cubic feet-to-US 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_us&to_unit=ft3",
    "calculator": "https://tttkmbb.com/api/v1/calculate/volume?value=5&from_unit=gal_us&to_unit=ft3",
    "mcp_tool": "convert_units",
    "mcp_arguments": {
      "value": 5,
      "from_unit": "gal_us",
      "to_unit": "ft3"
    }
  },
  "links": {
    "html": "https://tttkmbb.com/conversion/gallons-to-cubic-feet",
    "markdown": "https://tttkmbb.com/conversion/gallons-to-cubic-feet.md",
    "json": "https://tttkmbb.com/conversion/gallons-to-cubic-feet.json",
    "reverse": "https://tttkmbb.com/conversion/cubic-feet-to-gallons",
    "quantity_converter": "https://tttkmbb.com/conversion/volume",
    "units": "https://tttkmbb.com/api/v1/units?quantity=volume"
  },
  "timestamp": "2026-09-24"
}