{
  "entity_type": "unit_conversion_page",
  "id": "carats-to-grams",
  "name": "Carats to Grams",
  "title": "Carats to Grams Converter (ct to g)",
  "description": "Convert carats to grams: 1 ct = 0.2 g. Exact conversion factor, formula, 22-row table and worked examples, with JSON API and MCP access.",
  "quantity": "mass",
  "quantity_name": "Mass",
  "base_unit": "kg",
  "from_unit": {
    "symbol": "ct",
    "display": "ct",
    "name": "carats",
    "singular": "carat"
  },
  "to_unit": {
    "symbol": "g",
    "display": "g",
    "name": "grams",
    "singular": "gram"
  },
  "linear": true,
  "factor": 0.2,
  "inverse_factor": 5,
  "formula": "grams = carats × 0.2",
  "reverse_formula": "carats = grams × 5",
  "unit_relation": "1 ct = 0.2 g",
  "examples": [
    {
      "value": 5,
      "result": 1,
      "text": "5 ct = 1 g"
    },
    {
      "value": 12.5,
      "result": 2.5,
      "text": "12.5 ct = 2.5 g"
    },
    {
      "value": 100,
      "result": 20,
      "text": "100 ct = 20 g"
    }
  ],
  "table": [
    {
      "ct": 1,
      "g": 0.2
    },
    {
      "ct": 2,
      "g": 0.4
    },
    {
      "ct": 3,
      "g": 0.6
    },
    {
      "ct": 4,
      "g": 0.8
    },
    {
      "ct": 5,
      "g": 1
    },
    {
      "ct": 6,
      "g": 1.2
    },
    {
      "ct": 7,
      "g": 1.4
    },
    {
      "ct": 8,
      "g": 1.6
    },
    {
      "ct": 9,
      "g": 1.8
    },
    {
      "ct": 10,
      "g": 2
    },
    {
      "ct": 15,
      "g": 3
    },
    {
      "ct": 20,
      "g": 4
    },
    {
      "ct": 25,
      "g": 5
    },
    {
      "ct": 30,
      "g": 6
    },
    {
      "ct": 40,
      "g": 8
    },
    {
      "ct": 50,
      "g": 10
    },
    {
      "ct": 75,
      "g": 15
    },
    {
      "ct": 100,
      "g": 20
    },
    {
      "ct": 200,
      "g": 40
    },
    {
      "ct": 250,
      "g": 50
    },
    {
      "ct": 500,
      "g": 100
    },
    {
      "ct": 1000,
      "g": 200
    }
  ],
  "faq": [
    {
      "q": "How many grams are in one carat?",
      "a": "1 ct = 0.2 g. 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 carats to grams?",
      "a": "Multiply the value in carats by 0.2: grams = carats × 0.2. For example, 5 ct = 1 g."
    },
    {
      "q": "How do I convert grams back to carats?",
      "a": "Multiply by the inverse factor 5 (carats = grams × 5), or use the grams-to-carats 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=ct&to_unit=g",
    "calculator": "https://tttkmbb.com/api/v1/calculate/mass?value=5&from_unit=ct&to_unit=g",
    "mcp_tool": "convert_units",
    "mcp_arguments": {
      "value": 5,
      "from_unit": "ct",
      "to_unit": "g"
    }
  },
  "links": {
    "html": "https://tttkmbb.com/conversion/carats-to-grams",
    "markdown": "https://tttkmbb.com/conversion/carats-to-grams.md",
    "json": "https://tttkmbb.com/conversion/carats-to-grams.json",
    "reverse": "https://tttkmbb.com/conversion/grams-to-carats",
    "quantity_converter": "https://tttkmbb.com/conversion/mass",
    "units": "https://tttkmbb.com/api/v1/units?quantity=mass"
  },
  "timestamp": "2026-09-24"
}