{
  "entity_type": "unit_conversion_page",
  "id": "grams-to-grains",
  "name": "Grams to Grains",
  "title": "Grams to Grains Converter (g to grain)",
  "description": "Convert grams to grains: 1 g = 15.4324 grain. 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": "g",
    "display": "g",
    "name": "grams",
    "singular": "gram"
  },
  "to_unit": {
    "symbol": "grain",
    "display": "grain",
    "name": "grains",
    "singular": "grain"
  },
  "linear": true,
  "factor": 15.43235835,
  "inverse_factor": 0.06479891,
  "formula": "grains = grams × 15.43235835",
  "reverse_formula": "grams = grains × 0.06479891",
  "unit_relation": "1 g = 15.4324 grain",
  "examples": [
    {
      "value": 5,
      "result": 77.1618,
      "text": "5 g = 77.1618 grain"
    },
    {
      "value": 12.5,
      "result": 192.904,
      "text": "12.5 g = 192.904 grain"
    },
    {
      "value": 100,
      "result": 1543.24,
      "text": "100 g = 1543.24 grain"
    }
  ],
  "table": [
    {
      "g": 1,
      "grain": 15.4324
    },
    {
      "g": 2,
      "grain": 30.8647
    },
    {
      "g": 3,
      "grain": 46.2971
    },
    {
      "g": 4,
      "grain": 61.7294
    },
    {
      "g": 5,
      "grain": 77.1618
    },
    {
      "g": 6,
      "grain": 92.5942
    },
    {
      "g": 7,
      "grain": 108.027
    },
    {
      "g": 8,
      "grain": 123.459
    },
    {
      "g": 9,
      "grain": 138.891
    },
    {
      "g": 10,
      "grain": 154.324
    },
    {
      "g": 15,
      "grain": 231.485
    },
    {
      "g": 20,
      "grain": 308.647
    },
    {
      "g": 25,
      "grain": 385.809
    },
    {
      "g": 30,
      "grain": 462.971
    },
    {
      "g": 40,
      "grain": 617.294
    },
    {
      "g": 50,
      "grain": 771.618
    },
    {
      "g": 75,
      "grain": 1157.43
    },
    {
      "g": 100,
      "grain": 1543.24
    },
    {
      "g": 200,
      "grain": 3086.47
    },
    {
      "g": 250,
      "grain": 3858.09
    },
    {
      "g": 500,
      "grain": 7716.18
    },
    {
      "g": 1000,
      "grain": 15432.4
    }
  ],
  "faq": [
    {
      "q": "How many grains are in one gram?",
      "a": "1 g = 15.4324 grain. 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 grams to grains?",
      "a": "Multiply the value in grams by 15.43235835: grains = grams × 15.43235835. For example, 5 g = 77.1618 grain."
    },
    {
      "q": "How do I convert grains back to grams?",
      "a": "Multiply by the inverse factor 0.06479891 (grams = grains × 0.06479891), or use the grains-to-grams 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=g&to_unit=grain",
    "calculator": "https://tttkmbb.com/api/v1/calculate/mass?value=5&from_unit=g&to_unit=grain",
    "mcp_tool": "convert_units",
    "mcp_arguments": {
      "value": 5,
      "from_unit": "g",
      "to_unit": "grain"
    }
  },
  "links": {
    "html": "https://tttkmbb.com/conversion/grams-to-grains",
    "markdown": "https://tttkmbb.com/conversion/grams-to-grains.md",
    "json": "https://tttkmbb.com/conversion/grams-to-grains.json",
    "reverse": "https://tttkmbb.com/conversion/grains-to-grams",
    "quantity_converter": "https://tttkmbb.com/conversion/mass",
    "units": "https://tttkmbb.com/api/v1/units?quantity=mass"
  },
  "timestamp": "2026-09-24"
}