{
  "title": "Siding calculator",
  "human_url": "https://happytails.ai/en/calculators/siding-calculator/",
  "agent_url": "https://happytails.ai/agents/en/calculators/siding-calculator/",
  "language": "en",
  "markdown_url": "https://happytails.ai/en/calculators/siding-calculator.md",
  "content": "Siding calculator\nList your walls, gables, windows and doors to get the net siding area, squares and the number of lap boards or cartons, plus starter and trim lengths.\nHow can we improve this tool?\nReport a problem or share an idea.\nPlease leave out private information. Your message and the tool name go to our team via PostHog.\nHow to use Siding calculator\nEnter one row per line: wall, gable or opening, a name, the width and height, and an optional count.\nChoose the wall dimension unit and whether the siding is sold as lap boards or by carton area.\nEnter the exposure and board length, or the coverage per carton, and the waste allowance.\nReview the net area, squares and pieces, then download the report and CSV files.\nUseful next steps\nPaint calculator\nSquare footage\nBrick calculator\nNet wall area\nWalls are rectangles, gables are triangles of base × height ÷ 2, and windows and doors are subtracted. Fine Homebuilding uses the same break-down into rectangles and triangles for roofs (Mike Guertin, How to Estimate Materials for Roofing Projects, checked 16 October 2026). In the example, 1,420 ft² of walls and gables less 160.5 ft² of openings leaves 1,259.5 ft².\nBoards from exposure\nA lap board covers only its exposure, the visible reveal after the overlap, times its length. An 8.25 in plank laid with a 7 in exposure in 12 ft lengths covers 7 ft², so 1,259.5 ft² plus 10% waste needs 198 boards. For vinyl cartons or sheet panels, enter the net coverage per carton or the face area of one panel instead.\nSquares and trim\nSiding is often priced by the square, 100 ft² (Wikipedia, Square (unit), checked 16 October 2026). The starter strip length is the total width of the wall rows, opening trim is the perimeter of each opening, and gable trim is both sloped edges of each gable from the Pythagorean theorem (OpenStax Precalculus 2e, 5.4, checked 16 October 2026).\nLimits\nCorner posts, soffits, fascia and house wrap are not included, and exposure and coverage are product-specific, so check the product literature. Unit conversions use NIST SP 811.",
  "content_format": "text/plain",
  "visibility": "public",
  "links": [
    {
      "name": "Paint calculator",
      "url": "https://happytails.ai/en/calculators/paint-calculator/"
    },
    {
      "name": "Square footage",
      "url": "https://happytails.ai/en/calculators/square-footage/"
    },
    {
      "name": "Brick calculator",
      "url": "https://happytails.ai/en/calculators/brick-calculator/"
    }
  ],
  "tool": {
    "id": "siding-calculator",
    "category": "calculators",
    "built": true,
    "requirements": "Up to 300 rows and 100,000 characters, widths up to 1,000 m, heights up to 100 m and counts from 1 to 1,000, exposure up to 600 mm (23.6 in), board length up to 10 m, carton coverage up to 100 m² and waste from 0 to 50%. Calculated on your device; download a JSON report, a results CSV and a wall surfaces CSV.",
    "implementation": {
      "fields": [
        {
          "key": "lengthUnit",
          "label": "Wall dimension unit",
          "value": "ft",
          "type": "select",
          "values": [
            "ft",
            "in",
            "yd",
            "m",
            "cm",
            "mm"
          ]
        },
        {
          "key": "product",
          "label": "Siding sold as",
          "value": "Lap boards",
          "type": "select",
          "values": [
            "Lap boards",
            "Cartons or panels by area"
          ]
        },
        {
          "key": "exposureUnit",
          "label": "Exposure unit",
          "value": "in",
          "type": "select",
          "values": [
            "in",
            "mm",
            "cm"
          ],
          "showWhen": {
            "product": [
              "Lap boards"
            ]
          }
        },
        {
          "key": "exposure",
          "label": "Exposure (reveal) per course",
          "value": 7,
          "type": "number",
          "min": 0,
          "step": "any",
          "help": "Visible height of each course after the overlap, such as 7 in for an 8.25 in plank. Not the full board width.",
          "showWhen": {
            "product": [
              "Lap boards"
            ]
          }
        },
        {
          "key": "boardLength",
          "label": "Board length",
          "value": 12,
          "type": "number",
          "min": 0,
          "step": "any",
          "showWhen": {
            "product": [
              "Lap boards"
            ]
          }
        },
        {
          "key": "coverageUnit",
          "label": "Coverage unit",
          "value": "ft²",
          "type": "select",
          "values": [
            "ft²",
            "m²"
          ],
          "showWhen": {
            "product": [
              "Cartons or panels by area"
            ]
          }
        },
        {
          "key": "coverage",
          "label": "Coverage per carton or panel",
          "value": 200,
          "type": "number",
          "min": 0,
          "step": "any",
          "help": "Net wall coverage printed on the carton, or the face area of one panel, such as 32 ft² for a 4 × 8 ft sheet.",
          "showWhen": {
            "product": [
              "Cartons or panels by area"
            ]
          }
        },
        {
          "key": "waste",
          "label": "Waste allowance (%)",
          "value": 10,
          "type": "number",
          "min": 0,
          "max": 50,
          "step": "any",
          "help": "Extra for cuts, laps at board ends and damage. Enter 0 for none."
        }
      ],
      "registrationFamily": "roof-and-cladding",
      "input": true,
      "live": false,
      "presentation": "metrics",
      "inputMaxLength": 100000,
      "inputErrorCode": "ROOF_AND_CLADDING_TOO_LONG",
      "note": "Calculated on your device for up to 300 rows and 100,000 characters, walls up to 1,000 m long and 100 m high. Exposure and coverage come from your siding product.",
      "experience": {
        "automatic": false,
        "single": false,
        "inputMaxLength": 100000,
        "inputMode": "text",
        "label": "Walls, gables and openings",
        "placeholder": "wall, Front, 40, 9",
        "help": "One row per line: type (wall, gable or opening), name, width, height and an optional count. Up to 100,000 characters. Review the settings before running.",
        "action": null
      },
      "mode": "explicit",
      "interactive": false
    },
    "execution": "Browser interface",
    "api": null,
    "browser_agent": {
      "supported": true,
      "name": "run_current_tool",
      "discovery": "WebMCP on the human page in a supporting browser",
      "verification": "See audit/API-AUDIT.md; availability is not verification"
    }
  },
  "markdown": "# Siding calculator\n\n- Human page: https://happytails.ai/en/calculators/siding-calculator/\n- Markdown: https://happytails.ai/en/calculators/siding-calculator.md\n- Structured JSON: https://happytails.ai/agents/en/calculators/siding-calculator/index.json\n- Visibility: public\n\n## Tool capabilities\n\n| Property | Value |\n| --- | --- |\n| Tool ID | `siding-calculator` |\n| Category | calculators |\n| Implementation | Registered implementation. Registration alone is not a production-quality guarantee. |\n| Browser execution | Use the visible action or interactive controls. |\n| Browser processing | Browser; see tool notes for network behavior. |\n| HTTP API | Not callable through HTTP. |\n| Browser-agent interface | run_current_tool |\n\n### Implementation notes\n\nCalculated on your device for up to 300 rows and 100,000 characters, walls up to 1,000 m long and 100 m high. Exposure and coverage come from your siding product.\n\n### Inputs and settings\n\nText input: Walls, gables and openings.\n\nExample or placeholder shown in the interface (not a validated fixture):\n\n```text\nwall, Front, 40, 9\n```\n\nOne row per line: type (wall, gable or opening), name, width, height and an optional count. Up to 100,000 characters. Review the settings before running.\n\n| Setting | Meaning | Control type | Default | Constraints |\n| --- | --- | --- | --- | --- |\n| `lengthUnit` | Wall dimension unit | select | \"ft\" | Allowed: ft, in, yd, m, cm, mm |\n| `product` | Siding sold as | select | \"Lap boards\" | Allowed: Lap boards, Cartons or panels by area |\n| `exposureUnit` | Exposure unit | select | \"in\" | Allowed: in, mm, cm |\n| `exposure` | Exposure (reveal) per course | number | 7 | min=0 step=any |\n| `boardLength` | Board length | number | 12 | min=0 step=any |\n| `coverageUnit` | Coverage unit | select | \"ft²\" | Allowed: ft², m² |\n| `coverage` | Coverage per carton or panel | number | 200 | min=0 step=any |\n| `waste` | Waste allowance (%) | number | 10 | min=0 max=50 step=any |\n\n### Browser-agent workflow\n\n1. Open the human page in a browser that supports WebMCP.\n2. Discover the interface exposed by that page; use its actual schema.\n3. Select files on the page first when the tool requires files.\n4. Call `run_current_tool` with valid input and settings.\n5. Inspect the returned result or error and the displayed output. Retrieve files from the displayed download links.\n\nCalls do not automatically copy or download results. Browser permissions still apply. Interface availability alone is not proof of successful execution.\n\n### Planning specification\n\nUp to 300 rows and 100,000 characters, widths up to 1,000 m, heights up to 100 m and counts from 1 to 1,000, exposure up to 600 mm (23.6 in), board length up to 10 m, carton coverage up to 100 m² and waste from 0 to 50%. Calculated on your device; download a JSON report, a results CSV and a wall surfaces CSV.\n\nThis describes intended requirements. Use the implementation notes, interface schema and observed output to determine current support.\n\n### Complete machine-readable capability record\n\n```json\n{\n  \"id\": \"siding-calculator\",\n  \"category\": \"calculators\",\n  \"built\": true,\n  \"requirements\": \"Up to 300 rows and 100,000 characters, widths up to 1,000 m, heights up to 100 m and counts from 1 to 1,000, exposure up to 600 mm (23.6 in), board length up to 10 m, carton coverage up to 100 m² and waste from 0 to 50%. Calculated on your device; download a JSON report, a results CSV and a wall surfaces CSV.\",\n  \"implementation\": {\n    \"fields\": [\n      {\n        \"key\": \"lengthUnit\",\n        \"label\": \"Wall dimension unit\",\n        \"value\": \"ft\",\n        \"type\": \"select\",\n        \"values\": [\n          \"ft\",\n          \"in\",\n          \"yd\",\n          \"m\",\n          \"cm\",\n          \"mm\"\n        ]\n      },\n      {\n        \"key\": \"product\",\n        \"label\": \"Siding sold as\",\n        \"value\": \"Lap boards\",\n        \"type\": \"select\",\n        \"values\": [\n          \"Lap boards\",\n          \"Cartons or panels by area\"\n        ]\n      },\n      {\n        \"key\": \"exposureUnit\",\n        \"label\": \"Exposure unit\",\n        \"value\": \"in\",\n        \"type\": \"select\",\n        \"values\": [\n          \"in\",\n          \"mm\",\n          \"cm\"\n        ],\n        \"showWhen\": {\n          \"product\": [\n            \"Lap boards\"\n          ]\n        }\n      },\n      {\n        \"key\": \"exposure\",\n        \"label\": \"Exposure (reveal) per course\",\n        \"value\": 7,\n        \"type\": \"number\",\n        \"min\": 0,\n        \"step\": \"any\",\n        \"help\": \"Visible height of each course after the overlap, such as 7 in for an 8.25 in plank. Not the full board width.\",\n        \"showWhen\": {\n          \"product\": [\n            \"Lap boards\"\n          ]\n        }\n      },\n      {\n        \"key\": \"boardLength\",\n        \"label\": \"Board length\",\n        \"value\": 12,\n        \"type\": \"number\",\n        \"min\": 0,\n        \"step\": \"any\",\n        \"showWhen\": {\n          \"product\": [\n            \"Lap boards\"\n          ]\n        }\n      },\n      {\n        \"key\": \"coverageUnit\",\n        \"label\": \"Coverage unit\",\n        \"value\": \"ft²\",\n        \"type\": \"select\",\n        \"values\": [\n          \"ft²\",\n          \"m²\"\n        ],\n        \"showWhen\": {\n          \"product\": [\n            \"Cartons or panels by area\"\n          ]\n        }\n      },\n      {\n        \"key\": \"coverage\",\n        \"label\": \"Coverage per carton or panel\",\n        \"value\": 200,\n        \"type\": \"number\",\n        \"min\": 0,\n        \"step\": \"any\",\n        \"help\": \"Net wall coverage printed on the carton, or the face area of one panel, such as 32 ft² for a 4 × 8 ft sheet.\",\n        \"showWhen\": {\n          \"product\": [\n            \"Cartons or panels by area\"\n          ]\n        }\n      },\n      {\n        \"key\": \"waste\",\n        \"label\": \"Waste allowance (%)\",\n        \"value\": 10,\n        \"type\": \"number\",\n        \"min\": 0,\n        \"max\": 50,\n        \"step\": \"any\",\n        \"help\": \"Extra for cuts, laps at board ends and damage. Enter 0 for none.\"\n      }\n    ],\n    \"registrationFamily\": \"roof-and-cladding\",\n    \"input\": true,\n    \"live\": false,\n    \"presentation\": \"metrics\",\n    \"inputMaxLength\": 100000,\n    \"inputErrorCode\": \"ROOF_AND_CLADDING_TOO_LONG\",\n    \"note\": \"Calculated on your device for up to 300 rows and 100,000 characters, walls up to 1,000 m long and 100 m high. Exposure and coverage come from your siding product.\",\n    \"experience\": {\n      \"automatic\": false,\n      \"single\": false,\n      \"inputMaxLength\": 100000,\n      \"inputMode\": \"text\",\n      \"label\": \"Walls, gables and openings\",\n      \"placeholder\": \"wall, Front, 40, 9\",\n      \"help\": \"One row per line: type (wall, gable or opening), name, width, height and an optional count. Up to 100,000 characters. Review the settings before running.\",\n      \"action\": null\n    },\n    \"mode\": \"explicit\",\n    \"interactive\": false\n  },\n  \"execution\": \"Browser interface\",\n  \"api\": null,\n  \"browser_agent\": {\n    \"supported\": true,\n    \"name\": \"run_current_tool\",\n    \"discovery\": \"WebMCP on the human page in a supporting browser\",\n    \"verification\": \"See audit/API-AUDIT.md; availability is not verification\"\n  }\n}\n```\n\n## Page guide\n\nList your walls, gables, windows and doors to get the net siding area, squares and the number of lap boards or cartons, plus starter and trim lengths.\n\nHow can we improve this tool?\n\nReport a problem or share an idea.\n\nPlease leave out private information. Your message and the tool name go to our team via PostHog.\n\n### How to use Siding calculator\n\n1. Enter one row per line: wall, gable or opening, a name, the width and height, and an optional count.\n2. Choose the wall dimension unit and whether the siding is sold as lap boards or by carton area.\n3. Enter the exposure and board length, or the coverage per carton, and the waste allowance.\n4. Review the net area, squares and pieces, then download the report and CSV files.\n\n## Useful next steps\n\n- [Paint calculator](https://happytails.ai/en/calculators/paint-calculator/) ([Markdown](https://happytails.ai/en/calculators/paint-calculator.md))\n\n- [Square footage](https://happytails.ai/en/calculators/square-footage/) ([Markdown](https://happytails.ai/en/calculators/square-footage.md))\n\n- [Brick calculator](https://happytails.ai/en/calculators/brick-calculator/) ([Markdown](https://happytails.ai/en/calculators/brick-calculator.md))\n\n## Net wall area\n\nWalls are rectangles, gables are triangles of base × height ÷ 2, and windows and doors are subtracted. Fine Homebuilding uses the same break-down into rectangles and triangles for roofs (Mike Guertin, How to Estimate Materials for Roofing Projects, checked 16 October 2026). In the example, 1,420 ft² of walls and gables less 160.5 ft² of openings leaves 1,259.5 ft².\n\n### Boards from exposure\n\nA lap board covers only its exposure, the visible reveal after the overlap, times its length. An 8.25 in plank laid with a 7 in exposure in 12 ft lengths covers 7 ft², so 1,259.5 ft² plus 10% waste needs 198 boards. For vinyl cartons or sheet panels, enter the net coverage per carton or the face area of one panel instead.\n\n### Squares and trim\n\nSiding is often priced by the square, 100 ft² (Wikipedia, Square (unit), checked 16 October 2026). The starter strip length is the total width of the wall rows, opening trim is the perimeter of each opening, and gable trim is both sloped edges of each gable from the Pythagorean theorem (OpenStax Precalculus 2e, 5.4, checked 16 October 2026).\n\n### Limits\n\nCorner posts, soffits, fascia and house wrap are not included, and exposure and coverage are product-specific, so check the product literature. Unit conversions use NIST SP 811.\n"
}