{
  "entity_type": "unit_conversion_page",
  "id": "feet-to-cm",
  "name": "Feet to Centimeters",
  "title": "Feet to Centimeters Converter (ft to cm)",
  "description": "Convert feet to centimeters: 1 ft = 30.48 cm. Exact conversion factor, formula, 22-row table and worked examples, with JSON API and MCP access.",
  "quantity": "length",
  "quantity_name": "Length",
  "base_unit": "m",
  "from_unit": {
    "symbol": "ft",
    "display": "ft",
    "name": "feet",
    "singular": "foot"
  },
  "to_unit": {
    "symbol": "cm",
    "display": "cm",
    "name": "centimeters",
    "singular": "centimeter"
  },
  "linear": true,
  "factor": 30.48,
  "inverse_factor": 0.03280839895,
  "formula": "centimeters = feet × 30.48",
  "reverse_formula": "feet = centimeters × 0.03280839895",
  "unit_relation": "1 ft = 30.48 cm",
  "examples": [
    {
      "value": 5,
      "result": 152.4,
      "text": "5 ft = 152.4 cm"
    },
    {
      "value": 12.5,
      "result": 381,
      "text": "12.5 ft = 381 cm"
    },
    {
      "value": 100,
      "result": 3048,
      "text": "100 ft = 3048 cm"
    }
  ],
  "table": [
    {
      "ft": 1,
      "cm": 30.48
    },
    {
      "ft": 2,
      "cm": 60.96
    },
    {
      "ft": 3,
      "cm": 91.44
    },
    {
      "ft": 4,
      "cm": 121.92
    },
    {
      "ft": 5,
      "cm": 152.4
    },
    {
      "ft": 6,
      "cm": 182.88
    },
    {
      "ft": 7,
      "cm": 213.36
    },
    {
      "ft": 8,
      "cm": 243.84
    },
    {
      "ft": 9,
      "cm": 274.32
    },
    {
      "ft": 10,
      "cm": 304.8
    },
    {
      "ft": 15,
      "cm": 457.2
    },
    {
      "ft": 20,
      "cm": 609.6
    },
    {
      "ft": 25,
      "cm": 762
    },
    {
      "ft": 30,
      "cm": 914.4
    },
    {
      "ft": 40,
      "cm": 1219.2
    },
    {
      "ft": 50,
      "cm": 1524
    },
    {
      "ft": 75,
      "cm": 2286
    },
    {
      "ft": 100,
      "cm": 3048
    },
    {
      "ft": 200,
      "cm": 6096
    },
    {
      "ft": 250,
      "cm": 7620
    },
    {
      "ft": 500,
      "cm": 15240
    },
    {
      "ft": 1000,
      "cm": 30480
    }
  ],
  "faq": [
    {
      "q": "How many centimeters are in one foot?",
      "a": "1 ft = 30.48 cm. 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 feet to centimeters?",
      "a": "Multiply the value in feet by 30.48: centimeters = feet × 30.48. For example, 5 ft = 152.4 cm."
    },
    {
      "q": "How do I convert centimeters back to feet?",
      "a": "Multiply by the inverse factor 0.03280839895 (feet = centimeters × 0.03280839895), or use the centimeters-to-feet 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=ft&to_unit=cm",
    "calculator": "https://tttkmbb.com/api/v1/calculate/length?value=5&from_unit=ft&to_unit=cm",
    "mcp_tool": "convert_units",
    "mcp_arguments": {
      "value": 5,
      "from_unit": "ft",
      "to_unit": "cm"
    }
  },
  "links": {
    "html": "https://tttkmbb.com/conversion/feet-to-cm",
    "markdown": "https://tttkmbb.com/conversion/feet-to-cm.md",
    "json": "https://tttkmbb.com/conversion/feet-to-cm.json",
    "reverse": "https://tttkmbb.com/conversion/cm-to-feet",
    "quantity_converter": "https://tttkmbb.com/conversion/length",
    "units": "https://tttkmbb.com/api/v1/units?quantity=length"
  },
  "timestamp": "2026-09-24"
}