happytails.ai

Quilt binding calculator

Open Quilt binding 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-binding-calculator",
  "category": "calculators",
  "built": true,
  "requirements": "Straight width-of-fabric strips only, not bias layout. Up to 100,000 strips. Join loss must be smaller than the strip length. Purchase length rounds up to your increment.",
  "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": "quiltUnit",
        "label": "Quilt measurement unit",
        "value": "in",
        "type": "select",
        "values": [
          "mm",
          "cm",
          "m",
          "in",
          "ft",
          "yd"
        ]
      },
      {
        "key": "extraLength",
        "label": "Extra binding for corners, tails and closure",
        "value": 20,
        "type": "number",
        "min": 0,
        "max": 1000000000,
        "step": "any"
      },
      {
        "key": "extraUnit",
        "label": "Extra binding unit",
        "value": "in",
        "type": "select",
        "values": [
          "mm",
          "cm",
          "m",
          "in",
          "ft",
          "yd"
        ]
      },
      {
        "key": "stripLength",
        "label": "Usable length of each strip",
        "value": 42,
        "type": "number",
        "min": 0,
        "max": 1000000000,
        "step": "any"
      },
      {
        "key": "stripWidth",
        "label": "Cut width of each strip",
        "value": 2.5,
        "type": "number",
        "min": 0,
        "max": 1000000000,
        "step": "any"
      },
      {
        "key": "joinLoss",
        "label": "Length lost at each inter-strip join",
        "value": 2.5,
        "type": "number",
        "min": 0,
        "max": 1000000000,
        "step": "any"
      },
      {
        "key": "squaringAllowance",
        "label": "Fabric length allowance for squaring",
        "value": 0,
        "type": "number",
        "min": 0,
        "max": 1000000000,
        "step": "any"
      },
      {
        "key": "stripUnit",
        "label": "Strip and squaring measurement unit",
        "value": "in",
        "type": "select",
        "values": [
          "mm",
          "cm",
          "m",
          "in",
          "ft",
          "yd"
        ]
      },
      {
        "key": "purchaseIncrement",
        "label": "Fabric purchase increment",
        "value": 0.125,
        "type": "number",
        "min": 0,
        "max": 1000000000,
        "step": "any"
      },
      {
        "key": "purchaseUnit",
        "label": "Fabric purchase and output unit",
        "value": "yd",
        "type": "select",
        "values": [
          "yd",
          "m"
        ]
      }
    ],
    "input": false,
    "live": true,
    "presentation": "metrics",
    "note": "Plan straight width-of-fabric binding strips for a rectangular quilt. Enter usable fabric width and your join loss. The estimate includes whole strips and rounds fabric length to your purchase increment. Changing units keeps the entered numbers. All calculations stay on your device. Download the report for formulas, assumptions and calculated values.",
    "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"
  }
}

Page guide

Calculate straight binding strips and fabric length, including your join losses, tail allowance and purchase increments.

How to use Quilt binding calculator
  1. Enter the measured inputs and select their units.
  2. Review the calculated dimensions, counts and rounding.
  3. Download the result and verify it against a sample before making the full project.

Useful next steps

Fabric shrinkage calculatorCross-stitch fabric calculator

Measure the quilt and usable strip length

Enter the rectangular quilt dimensions and extra binding length for corners, tails and final closure. Use strip length after removing selvedges. Strip width is the width to cut, before folding.

Account for every strip join

Enter the length lost at each inter-strip join. Eight 42-inch strips with 2.5 inches lost at each of seven joins give 318.5 inches of usable binding. At a 2.5-inch cut width, those strips need 20 inches of fabric length, before any squaring allowance.

Save the calculation

Download a CSV of the results or instructions, a readable text report and a JSON report with values, formulas and assumptions. Calculations run locally on your device. Unit changes keep the numbers already entered, so check the selected units before using the result.