{
  "entity_type": "unit_conversion_page",
  "id": "square-inches-to-square-feet",
  "name": "Square inches to Square feet",
  "title": "Square inches to Square feet Converter (in² to ft²)",
  "description": "Convert square inches to square feet: 1 in² = 0.00694444 ft². Exact conversion factor, formula, 22-row table and worked examples, with JSON API and MCP access.",
  "quantity": "area",
  "quantity_name": "Area",
  "base_unit": "m2",
  "from_unit": {
    "symbol": "in2",
    "display": "in²",
    "name": "square inches",
    "singular": "square inch"
  },
  "to_unit": {
    "symbol": "ft2",
    "display": "ft²",
    "name": "square feet",
    "singular": "square foot"
  },
  "linear": true,
  "factor": 0.006944444444,
  "inverse_factor": 144,
  "formula": "square feet = square inches × 0.006944444444",
  "reverse_formula": "square inches = square feet × 144",
  "unit_relation": "1 in² = 0.00694444 ft²",
  "examples": [
    {
      "value": 5,
      "result": 0.0347222,
      "text": "5 in² = 0.0347222 ft²"
    },
    {
      "value": 12.5,
      "result": 0.0868056,
      "text": "12.5 in² = 0.0868056 ft²"
    },
    {
      "value": 100,
      "result": 0.694444,
      "text": "100 in² = 0.694444 ft²"
    }
  ],
  "table": [
    {
      "in2": 1,
      "ft2": 0.00694444
    },
    {
      "in2": 2,
      "ft2": 0.0138889
    },
    {
      "in2": 3,
      "ft2": 0.0208333
    },
    {
      "in2": 4,
      "ft2": 0.0277778
    },
    {
      "in2": 5,
      "ft2": 0.0347222
    },
    {
      "in2": 6,
      "ft2": 0.0416667
    },
    {
      "in2": 7,
      "ft2": 0.0486111
    },
    {
      "in2": 8,
      "ft2": 0.0555556
    },
    {
      "in2": 9,
      "ft2": 0.0625
    },
    {
      "in2": 10,
      "ft2": 0.0694444
    },
    {
      "in2": 15,
      "ft2": 0.104167
    },
    {
      "in2": 20,
      "ft2": 0.138889
    },
    {
      "in2": 25,
      "ft2": 0.173611
    },
    {
      "in2": 30,
      "ft2": 0.208333
    },
    {
      "in2": 40,
      "ft2": 0.277778
    },
    {
      "in2": 50,
      "ft2": 0.347222
    },
    {
      "in2": 75,
      "ft2": 0.520833
    },
    {
      "in2": 100,
      "ft2": 0.694444
    },
    {
      "in2": 200,
      "ft2": 1.38889
    },
    {
      "in2": 250,
      "ft2": 1.73611
    },
    {
      "in2": 500,
      "ft2": 3.47222
    },
    {
      "in2": 1000,
      "ft2": 6.94444
    }
  ],
  "faq": [
    {
      "q": "How many square feet are in one square inch?",
      "a": "1 in² = 0.00694444 ft². 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 square inches to square feet?",
      "a": "Multiply the value in square inches by 0.006944444444: square feet = square inches × 0.006944444444. For example, 5 in² = 0.0347222 ft²."
    },
    {
      "q": "How do I convert square feet back to square inches?",
      "a": "Multiply by the inverse factor 144 (square inches = square feet × 144), or use the square feet-to-square inches 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=in2&to_unit=ft2",
    "calculator": "https://tttkmbb.com/api/v1/calculate/area?value=5&from_unit=in2&to_unit=ft2",
    "mcp_tool": "convert_units",
    "mcp_arguments": {
      "value": 5,
      "from_unit": "in2",
      "to_unit": "ft2"
    }
  },
  "links": {
    "html": "https://tttkmbb.com/conversion/square-inches-to-square-feet",
    "markdown": "https://tttkmbb.com/conversion/square-inches-to-square-feet.md",
    "json": "https://tttkmbb.com/conversion/square-inches-to-square-feet.json",
    "reverse": "https://tttkmbb.com/conversion/square-feet-to-square-inches",
    "quantity_converter": "https://tttkmbb.com/conversion/area",
    "units": "https://tttkmbb.com/api/v1/units?quantity=area"
  },
  "timestamp": "2026-09-24"
}