happytails.ai

Pottery shrinkage calculator

Open Pottery shrinkage 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": "pottery-shrinkage-calculator",
  "category": "calculators",
  "built": true,
  "requirements": "Each measured stage and total shrinkage must fall between -50% and 95%. No kiln settings, clay presets or dry-stage estimate from total shrinkage alone.",
  "implementation": {
    "fields": [
      {
        "key": "mode",
        "label": "Shrinkage input",
        "value": "Measured stages",
        "type": "select",
        "values": [
          "Measured stages",
          "Known total shrinkage"
        ]
      },
      {
        "key": "wetSample",
        "label": "Wet test-bar dimension",
        "value": 100,
        "type": "number",
        "min": 0,
        "max": 1000000000,
        "step": "any",
        "showWhen": {
          "mode": [
            "Measured stages"
          ]
        }
      },
      {
        "key": "drySample",
        "label": "Dry test-bar dimension",
        "value": 95,
        "type": "number",
        "min": 0,
        "max": 1000000000,
        "step": "any",
        "showWhen": {
          "mode": [
            "Measured stages"
          ]
        }
      },
      {
        "key": "firedSample",
        "label": "Fired test-bar dimension",
        "value": 85.5,
        "type": "number",
        "min": 0,
        "max": 1000000000,
        "step": "any",
        "showWhen": {
          "mode": [
            "Measured stages"
          ]
        }
      },
      {
        "key": "sampleUnit",
        "label": "Test-bar unit",
        "value": "mm",
        "type": "select",
        "values": [
          "mm",
          "cm",
          "m",
          "in",
          "ft",
          "yd"
        ],
        "showWhen": {
          "mode": [
            "Measured stages"
          ]
        }
      },
      {
        "key": "totalShrink",
        "label": "Total wet-to-fired shrinkage (%)",
        "value": 14.5,
        "type": "number",
        "min": -50,
        "max": 95,
        "step": "any",
        "showWhen": {
          "mode": [
            "Known total shrinkage"
          ]
        }
      },
      {
        "key": "inputStage",
        "label": "Stage of the dimension you know",
        "value": "Fired",
        "type": "select",
        "values": [
          "Wet",
          "Dry",
          "Fired"
        ]
      },
      {
        "key": "dimension",
        "label": "Dimension at that stage",
        "value": 100,
        "type": "number",
        "min": 0,
        "max": 1000000000,
        "step": "any"
      },
      {
        "key": "unit",
        "label": "Dimension and output unit",
        "value": "mm",
        "type": "select",
        "values": [
          "mm",
          "cm",
          "m",
          "in",
          "ft",
          "yd"
        ]
      }
    ],
    "input": false,
    "live": true,
    "presentation": "metrics",
    "note": "Convert between measured wet, dry and fired sizes. Dry-stage conversion needs Measured stages mode. Use a test bar from the same clay and firing process. 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

Convert wet, dry and fired dimensions using measurements from your own clay test bar or a known total shrinkage rate.

How to use Pottery shrinkage 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

3D print shrinkage compensatorFabric shrinkage calculator

Use a test bar from the same process

Enter measurements from the wet, dry and fired stages of the same test bar. Select the stage of the dimension you know. The calculator shows the equivalent dimensions at the other measured stages.

Keep stage percentages separate

A 100 mm wet bar that dries to 95 mm and fires to 85.5 mm has 5% drying shrinkage and 10% further firing shrinkage. The combined shrinkage is 14.5%, because percentages compound. Known total mode converts wet and fired dimensions only.

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.