Quilt backing calculator

Open Quilt backing calculator on Happytails.ai. This view has the same page content and links, with explicit tool capabilities. Read the processing notes before using a tool.

Tool capabilities

{
  "id": "quilt-backing-calculator",
  "category": "calculators",
  "built": true,
  "requirements": "Up to 1,000 equal full-width panels. Compares straight vertical and horizontal joins only. Offcut optimization, diagonal piecing, print matching and shrinkage need separate allowance.",
  "implementation": {
    "fields": [
      {
        "key": "width",
        "label": "Quilt width",
        "value": 60,
        "type": "number",
        "min": 0,
        "max": 1000000000,
        "step": "any"
      },
      {
        "key": "height",
        "label": "Quilt height",
        "value": 80,
        "type": "number",
        "min": 0,
        "max": 1000000000,
        "step": "any"
      },
      {
        "key": "overhang",
        "label": "Backing overhang on every quilt edge",
        "value": 4,
        "type": "number",
        "min": 0,
        "max": 1000000000,
        "step": "any"
      },
      {
        "key": "fabricWidth",
        "label": "Usable fabric width after selvedges",
        "value": 42,
        "type": "number",
        "min": 0,
        "max": 1000000000,
        "step": "any"
      },
      {
        "key": "seam",
        "label": "Seam allowance on each joined edge",
        "value": 0.5,
        "type": "number",
        "min": 0,
        "max": 1000000000,
        "step": "any"
      },
      {
        "key": "squaring",
        "label": "Extra total fabric length for squaring",
        "value": 2,
        "type": "number",
        "min": 0,
        "max": 1000000000,
        "step": "any"
      },
      {
        "key": "unit",
        "label": "Dimension unit",
        "value": "in",
        "type": "select",
        "values": [
          "mm",
          "cm",
          "m",
          "in",
          "ft",
          "yd"
        ]
      },
      {
        "key": "orientation",
        "label": "Panel direction",
        "value": "Least fabric",
        "type": "select",
        "values": [
          "Least fabric",
          "Vertical seams",
          "Horizontal seams"
        ]
      },
      {
        "key": "purchaseIncrement",
        "label": "Fabric purchase increment",
        "value": 0.125,
        "type": "number",
        "min": 0,
        "max": 1000000000,
        "step": "any"
      },
      {
        "key": "purchaseUnit",
        "label": "Purchase unit",
        "value": "yd",
        "type": "select",
        "values": [
          "yd",
          "m"
        ]
      }
    ],
    "input": false,
    "live": true,
    "background": false,
    "presentation": "metrics",
    "note": "Compare vertical and horizontal backing joins, including both sides of every seam. The layout uses equal full-width panels and does not optimize offcuts or pattern matching. Changing units keeps the entered numbers. Calculations run on your device.",
    "experience": {
      "automatic": true,
      "single": false,
      "inputMaxLength": 1000000,
      "inputMode": "text",
      "label": "Your text",
      "placeholder": "Type or paste your input…",
      "help": "Change the input or settings to update your result. Results update as you type. Up to 1,000,000 characters.",
      "helpParts": [
        "Change the input or settings to update your result.",
        "Results update as you type.",
        "Up to 1,000,000 characters."
      ],
      "action": null
    },
    "mode": "automatic",
    "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"
  }
}

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