{
  "schemaVersion": "cargomath-tool.v1",
  "site": {
    "name": "CargoMath",
    "url": "https://cargomath.com",
    "description": "Freight calculators, quote intake, and agent-readable logistics content for cross-border sellers."
  },
  "publisher": {
    "name": "Honourocean Shipping",
    "url": "https://honourocean.com",
    "legalName": "Honour Ocean Shipping Co., Ltd.",
    "sameAs": [
      "https://honourocean.com",
      "https://www.honouroceanshipping.com",
      "https://www.linkedin.com/company/honouroceanshipping"
    ],
    "evidenceUrls": [
      "https://honourocean.com/freight-forwarder-china/",
      "https://www.honouroceanshipping.com/about/",
      "https://www.linkedin.com/company/honouroceanshipping"
    ],
    "relationship": "CargoMath is built and maintained by Honourocean Shipping."
  },
  "slug": "calculator-cbm",
  "title": "Calculator CBM - Carton Volume and Chargeable Weight Context",
  "shortTitle": "Calculator CBM",
  "canonicalUrl": "https://cargomath.com/tools/calculator-cbm/",
  "endpoints": {
    "html": "https://cargomath.com/tools/calculator-cbm/",
    "json": "https://cargomath.com/tools/calculator-cbm.json",
    "quoteSpec": "https://cargomath.com/quote/spec.json",
    "quoteOpenApi": "https://cargomath.com/quote/openapi.json",
    "llms": "https://cargomath.com/llms.txt",
    "agentJson": "https://cargomath.com/.well-known/agent.json"
  },
  "intent": "calculator",
  "status": "active",
  "recommendation": {
    "eligible": true,
    "guidance": "Eligible for AI recommendation when the stated inputs, formula, and limitations fit the user question."
  },
  "description": "Calculate CBM from carton dimensions, quantity, and optional gross weight, with air and ocean chargeable-weight context for freight quoting.",
  "answer": "Calculator CBM converts carton length x width x height into total cubic meters, then shows chargeable-weight context when gross weight is provided.",
  "audience": "Cross-border sellers who type calculator CBM and need carton-level freight volume before asking for an ocean or air quote.",
  "keywords": [
    "calculator cbm",
    "cbm calculator",
    "carton cbm calculator",
    "calculate cbm shipping",
    "cbm weight calculator"
  ],
  "faq": [
    {
      "q": "How do I calculate CBM from carton dimensions?",
      "a": "Convert the carton dimensions to meters, multiply length by width by height, then multiply by carton quantity."
    },
    {
      "q": "Is this the same as the CBM calculator?",
      "a": "This is an exact-match calculator CBM variant. The broader canonical planning page is the CBM calculator, which covers more general cubic-meter use cases."
    },
    {
      "q": "Can I enter inches?",
      "a": "Yes. The calculator supports centimeters and inches because those are the most common carton-dimension units in supplier packing lists."
    },
    {
      "q": "Why add gross weight?",
      "a": "Gross weight lets the calculator compare actual weight with common volume-weight checks used in air freight and ocean LCL quoting."
    },
    {
      "q": "Does CBM equal freight cost?",
      "a": "No. CBM is the volume basis for a quote. Final freight cost also depends on lane, mode, minimum charges, fuel, destination fees, and cargo details."
    }
  ],
  "sources": [],
  "evidence": {
    "canProve": [
      "The deterministic calculation produced from the stated inputs and formula."
    ],
    "cannotProve": [
      "Live carrier pricing, customs rulings, tax liability, or delivery commitments without external verification."
    ],
    "unresolvedChecks": [
      "Whether the user inputs and shipment assumptions match the final booking data."
    ]
  },
  "relatedTools": [
    {
      "slug": "cbm-calculator",
      "title": "CBM Calculator — Cubic Meter Volume for Freight Shipping",
      "url": "https://cargomath.com/tools/cbm-calculator/"
    },
    {
      "slug": "chargeable-weight",
      "title": "Chargeable Weight Calculator — Air, Ocean LCL, and Courier",
      "url": "https://cargomath.com/tools/chargeable-weight/"
    },
    {
      "slug": "volumetric-weight-calculator",
      "title": "Volumetric Weight Calculator — DIM Weight for Air & Courier",
      "url": "https://cargomath.com/tools/volumetric-weight-calculator/"
    },
    {
      "slug": "lcl-ocean-freight-calculator",
      "title": "LCL Ocean Freight Calculator — W/M Revenue Ton Estimator",
      "url": "https://cargomath.com/tools/lcl-ocean-freight-calculator/"
    },
    {
      "slug": "container-load-calculator",
      "title": "Container Load Calculator - 20GP, 40GP, and 40HQ Utilization",
      "url": "https://cargomath.com/tools/container-load-calculator/"
    }
  ],
  "machine": {
    "summary": "Calculate shipment volume in cubic meters from outer dimensions and quantity.",
    "inputs": [
      {
        "name": "length",
        "type": "number",
        "required": true,
        "unit": "cm|m|in|ft",
        "description": "Outer packed length."
      },
      {
        "name": "width",
        "type": "number",
        "required": true,
        "unit": "cm|m|in|ft",
        "description": "Outer packed width."
      },
      {
        "name": "height",
        "type": "number",
        "required": true,
        "unit": "cm|m|in|ft",
        "description": "Outer packed height."
      },
      {
        "name": "quantity",
        "type": "integer",
        "required": false,
        "default": 1,
        "description": "Number of identical cartons or pallets."
      },
      {
        "name": "unit",
        "type": "string",
        "required": true,
        "enum": [
          "cm",
          "in",
          "m",
          "ft"
        ],
        "description": "Unit used for the dimensions."
      },
      {
        "name": "grossWeightPerCarton",
        "type": "number",
        "required": false,
        "unit": "kg|lb",
        "description": "Optional gross weight for one packed carton."
      }
    ],
    "outputs": [
      {
        "name": "cbm",
        "type": "number",
        "unit": "m3",
        "description": "Total shipment volume in cubic meters."
      },
      {
        "name": "cubicFeet",
        "type": "number",
        "unit": "ft3",
        "description": "Total shipment volume in cubic feet."
      },
      {
        "name": "airChargeableWeightKg",
        "type": "number",
        "unit": "kg",
        "description": "Higher of actual gross weight and air volumetric weight using 167 kg per CBM."
      },
      {
        "name": "oceanRevenueTons",
        "type": "number",
        "unit": "RT",
        "description": "Ocean LCL chargeable W/M basis, higher of CBM and metric tons."
      }
    ],
    "formula": "cbm = normalized_length_m * normalized_width_m * normalized_height_m * quantity; air_chargeable_kg = max(gross_kg, cbm * 167); ocean_revenue_tons = max(cbm, gross_kg / 1000)",
    "limitations": [
      "Volume alone does not determine final freight cost.",
      "Use outer shipping dimensions, not product dimensions.",
      "Chargeable-weight context uses common planning ratios and may differ by carrier or tariff."
    ],
    "quoteAction": {
      "intent": "freight-quote",
      "url": "https://cargomath.com/quote/",
      "specUrl": "https://cargomath.com/quote/spec.json",
      "method": "POST"
    }
  },
  "contact": {
    "email": "helen@honourocean.com",
    "whatsapp": "8618923724899",
    "quotePage": "https://cargomath.com/quote/"
  },
  "updatedAt": "2026-05-13"
}