{
  "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": "container-load-calculator",
  "title": "Container Load Calculator - 20GP, 40GP, and 40HQ Utilization",
  "shortTitle": "Container Load",
  "canonicalUrl": "https://cargomath.com/tools/container-load-calculator/",
  "endpoints": {
    "html": "https://cargomath.com/tools/container-load-calculator/",
    "json": "https://cargomath.com/tools/container-load-calculator.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": "Estimate container utilization by CBM and gross weight for 20GP, 40GP, and 40HQ ocean containers, using practical loading capacity and payload limits.",
  "answer": "A container load calculator compares shipment CBM and gross weight against practical 20GP, 40GP, or 40HQ capacity to estimate utilization and whether volume or weight is the limiting factor.",
  "audience": "Cross-border sellers and importers checking whether a shipment should quote LCL, 20GP, 40GP, 40HQ, or multiple containers.",
  "keywords": [
    "container load calculator",
    "shipping container load calculator",
    "20gp 40gp 40hq calculator",
    "container utilization calculator",
    "container capacity calculator"
  ],
  "faq": [
    {
      "q": "What does a container load calculator estimate?",
      "a": "It estimates how much of a selected container is used by shipment CBM and gross weight, then flags whether volume or weight is the constraint."
    },
    {
      "q": "What practical CBM should I use for a 20GP?",
      "a": "A 20GP has about 33 CBM internal volume, but many forwarders plan around 28 CBM practical usable volume after packaging, pallets, airflow, and loading gaps."
    },
    {
      "q": "What practical CBM should I use for a 40GP?",
      "a": "A 40GP has about 67 CBM internal volume, with about 58 CBM commonly used as practical planning capacity for mixed export cargo."
    },
    {
      "q": "What practical CBM should I use for a 40HQ?",
      "a": "A 40HQ has about 76 CBM internal volume, with about 68 CBM commonly used as practical planning capacity for bulky cargo."
    },
    {
      "q": "Is this the same as a CBM calculator?",
      "a": "No. A CBM calculator calculates shipment volume from dimensions. This tool starts after you know CBM and compares it with container capacity and payload."
    },
    {
      "q": "Is this the same as a pallet container packing tool?",
      "a": "No. Pallet packing checks pallet count and layout. This tool is a higher-level utilization estimate from total CBM and weight."
    }
  ],
  "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": "pallet-cbm-calculator",
      "title": "Pallet CBM Calculator — Volume by Pallet Size, Stack Height, and Count",
      "url": "https://cargomath.com/tools/pallet-cbm-calculator/"
    },
    {
      "slug": "container-shipping-cost-calculator",
      "title": "Container Shipping Cost Calculator — 20ft / 40ft / 40HQ All-In Estimate",
      "url": "https://cargomath.com/tools/container-shipping-cost-calculator/"
    },
    {
      "slug": "fcl-vs-lcl-calculator",
      "title": "FCL vs LCL Calculator — Break-Even Volume for Ocean Freight",
      "url": "https://cargomath.com/tools/fcl-vs-lcl-calculator/"
    }
  ],
  "machine": {
    "summary": "Estimate selected-container utilization from shipment CBM and gross weight against practical CBM and payload capacity.",
    "inputs": [
      {
        "name": "cbm",
        "type": "number",
        "required": true,
        "unit": "m3",
        "description": "Total packed shipment volume in cubic meters."
      },
      {
        "name": "weightKg",
        "type": "number",
        "required": true,
        "unit": "kg",
        "description": "Total gross shipment weight including cartons, pallets, and packaging."
      },
      {
        "name": "containerType",
        "type": "string",
        "required": true,
        "enum": [
          "20GP",
          "40GP",
          "40HQ"
        ],
        "description": "Container size to test for utilization."
      }
    ],
    "outputs": [
      {
        "name": "volumeUtilization",
        "type": "number",
        "unit": "%",
        "description": "Shipment CBM divided by practical CBM capacity."
      },
      {
        "name": "weightUtilization",
        "type": "number",
        "unit": "%",
        "description": "Gross weight divided by container payload capacity."
      },
      {
        "name": "limitingFactor",
        "type": "string",
        "description": "Whether volume, weight, or both are controlling the fit."
      }
    ],
    "formula": "volume utilization = cbm / practical_cbm; weight utilization = gross_weight_kg / max_payload_kg; required containers = ceil(max(volume_ratio, weight_ratio))",
    "limitations": [
      "Uses practical planning capacity, not a guaranteed load plan.",
      "Does not account for exact carton orientation, pallet layout, blocked space, axle weight, road weight limits, or destination overweight rules.",
      "Container payload varies by carrier, container tare, and route; confirm the booking note before loading heavy cargo."
    ],
    "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"
}