{
  "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": "cylinder-volume-calculator",
  "title": "Cylinder Volume Calculator — Drums, Tanks & Freight CBM",
  "shortTitle": "Cylinder Volume",
  "canonicalUrl": "https://cargomath.com/tools/cylinder-volume-calculator/",
  "endpoints": {
    "html": "https://cargomath.com/tools/cylinder-volume-calculator/",
    "json": "https://cargomath.com/tools/cylinder-volume-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": "Calculate the geometric volume of a cylinder from outside diameter, height, quantity, and unit; see CBM, liters, and cubic feet with freight packing limits explained.",
  "answer": "Cylinder volume is π × (diameter ÷ 2)² × height; for freight, use the outside packed dimensions and do not confuse internal liquid capacity with shipping CBM.",
  "audience": "Importers and freight planners shipping drums, rolls, tanks, cylinders, cable reels, or other cylindrical cargo.",
  "keywords": [
    "cylinder volume calculator",
    "cylinder volume calculators",
    "drum volume calculator",
    "tank volume calculator",
    "cylinder cbm calculator",
    "barrel shipping volume"
  ],
  "faq": [
    {
      "q": "What is the cylinder volume formula?",
      "a": "V = πr²h, where r is half the diameter and h is the cylinder height or length."
    },
    {
      "q": "Should freight CBM use inside or outside dimensions?",
      "a": "Use the outside packed shipping dimensions because carriers sell the space occupied by the package."
    },
    {
      "q": "Does a drum occupy only its cylinder volume in a container?",
      "a": "No. Round items create voids when arranged in rectangular space, so a real load plan usually uses more space."
    },
    {
      "q": "Can the result be converted to liters?",
      "a": "Yes. One cubic meter equals exactly 1,000 liters."
    },
    {
      "q": "Does this calculator approve a dangerous-goods shipment?",
      "a": "No. Classification, packaging, marks, documents, carrier acceptance, and route rules require separate review."
    },
    {
      "q": "Can I calculate a horizontal cylinder?",
      "a": "The full geometric volume is the same; this tool does not calculate partial liquid fill at a given depth."
    }
  ],
  "sources": [
    {
      "name": "NIST — SI Units: Volume",
      "url": "https://www.nist.gov/pml/owm/si-units-volume",
      "accessedAt": "2026-09-28",
      "note": "Defines cubic meter and liter relationships used in the output."
    }
  ],
  "evidence": {
    "canProve": [
      "Geometric cylinder volume from entered diameter, height, quantity, and unit."
    ],
    "cannotProve": [
      "Real container fit, dangerous-goods acceptance, liquid fill level, or freight price."
    ]
  },
  "relatedTools": [
    {
      "slug": "volume-unit-converter",
      "title": "Volume Unit Converter — CBM, Liters, Cubic Feet & Cubic Inches",
      "url": "https://cargomath.com/tools/volume-unit-converter/"
    },
    {
      "slug": "cbm-calculator",
      "title": "CBM Calculator — Cubic Meter Volume for Freight Shipping",
      "url": "https://cargomath.com/tools/cbm-calculator/"
    },
    {
      "slug": "container-load-calculator",
      "title": "Container Load Calculator - 20GP, 40GP, and 40HQ Utilization",
      "url": "https://cargomath.com/tools/container-load-calculator/"
    },
    {
      "slug": "air-freight-chargeable-weight-calculator",
      "title": "Air Freight Chargeable Weight Calculator",
      "url": "https://cargomath.com/tools/air-freight-chargeable-weight-calculator/"
    }
  ],
  "machine": {
    "summary": "Calculate full cylinder volume from outside diameter and height, with quantity.",
    "inputs": [
      {
        "name": "diameter",
        "type": "number",
        "required": true,
        "description": "Outside cylinder diameter."
      },
      {
        "name": "height",
        "type": "number",
        "required": true,
        "description": "Outside cylinder height or length."
      },
      {
        "name": "quantity",
        "type": "integer",
        "required": false,
        "default": 1,
        "description": "Number of identical cylinders."
      },
      {
        "name": "unit",
        "type": "string",
        "required": true,
        "enum": [
          "cm",
          "m",
          "in",
          "ft"
        ],
        "description": "Unit for diameter and height."
      }
    ],
    "outputs": [
      {
        "name": "totalCbm",
        "type": "number",
        "unit": "m3",
        "description": "Total geometric cylinder volume."
      },
      {
        "name": "totalLiters",
        "type": "number",
        "unit": "L",
        "description": "Equivalent volume in liters."
      },
      {
        "name": "totalCubicFeet",
        "type": "number",
        "unit": "ft3",
        "description": "Equivalent volume in cubic feet."
      }
    ],
    "formula": "volume = pi * (diameter / 2)^2 * height * quantity after normalizing dimensions to meters",
    "limitations": [
      "Uses full cylinders only.",
      "Internal capacity and outer freight footprint are not interchangeable.",
      "Does not model nesting, voids, pallets, orientation, or restraints."
    ],
    "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": "2026-09-28"
}