{
  "id": "molecular-weight-calculator",
  "version": "7.0.0",
  "name": "Molecular Weight",
  "shortName": "Molecular Weight",
  "description": "Calculate molar mass from a neutral molecular formula, including nested groups and hydrate notation.",
  "category": "Science & Engineering",
  "categorySlug": "science-engineering",
  "keywords": [
    "molecular",
    "weight"
  ],
  "status": "live",
  "workStatus": "pending",
  "reviewStatus": "pending",
  "migrationStatus": "migrated",
  "migratedDate": "2026-08-18",
  "engine": "legacy-react",
  "creator": null,
  "reviewer": null,
  "quality": {
    "availability": "live",
    "technicalReviewRecord": "/reviews/molecular-weight-calculator.json",
    "qualifiedReview": "pending",
    "qualifiedReviewer": null,
    "qualifiedReviewDate": null,
    "formulaVersion": "7.0.0",
    "referenceCoverage": "references-listed",
    "releaseTestScope": "Catalog and regression checks are not a professional formula audit; consult release evidence.",
    "historicalMetadataDate": "2026-08-18",
    "historicalMetadataNotice": "The imported date is not evidence of a completed human review."
  },
  "notice": "Uses conventional average atomic weights. Isotope-specific masses and ionic charge notation are outside this calculator.",
  "urls": {
    "page": "/calculator/molecular-weight-calculator/",
    "definition": "/calculator/molecular-weight-calculator/definition.json",
    "schema": "/calculator/molecular-weight-calculator/schema.json",
    "llms": "/calculator/molecular-weight-calculator/llms.txt",
    "legacyDefinition": "/calculator/molecular-weight-calculator.json"
  },
  "queryExample": "https://askcalculators.com/calculator/molecular-weight-calculator/?formula=H2O",
  "queryParameters": {
    "formula": {
      "label": "Formula (e.g., H2O, C6H12O6)",
      "type": "text",
      "required": false,
      "default": "H2O"
    }
  },
  "inputs": [
    {
      "id": "formula",
      "label": "Formula (e.g., H2O, C6H12O6)",
      "type": "text",
      "defaultValue": "H2O"
    }
  ],
  "outputs": [
    {
      "id": "result",
      "label": "Result",
      "format": "text",
      "primary": true
    }
  ],
  "formula": {
    "expression": "Molar mass = Σ(standard atomic weight × atom count); group multipliers and hydrate coefficients are expanded before summing."
  },
  "examples": [
    {
      "label": "Reproducible default-input example (not a personal recommendation)",
      "inputs": {
        "formula": "H2O"
      }
    }
  ],
  "sources": [
    {
      "label": "NIST periodic table and atomic properties",
      "url": "https://physics.nist.gov/PhysRefData/PerTable/index.html"
    }
  ]
}