# Pipe weight calculator

- Human page: https://happytails.ai/en/calculators/pipe-weight-calculator/
- Markdown: https://happytails.ai/en/calculators/pipe-weight-calculator.md
- Structured JSON: https://happytails.ai/agents/en/calculators/pipe-weight-calculator/index.json
- Visibility: public

## Tool capabilities

| Property | Value |
| --- | --- |
| Tool ID | `pipe-weight-calculator` |
| Category | calculators |
| Implementation | Registered implementation. Registration alone is not a production-quality guarantee. |
| Browser execution | Automatic updates after valid input or file selection. |
| Browser processing | Browser; see tool notes for network behavior. |
| HTTP API | Not callable through HTTP. |
| Browser-agent interface | run_current_tool |

### Implementation notes

Estimate the mass of a uniform hollow round section. Use measured diameters, not a nominal pipe size. Coatings, fittings and pipe contents are excluded. Changing units keeps the entered numbers. All calculations stay on your device. These estimates do not establish structural safety or code compliance.

### Inputs and settings

No free-text input is required. Use the file inputs and/or settings below.

| Setting | Meaning | Control type | Default | Constraints |
| --- | --- | --- | --- | --- |
| `outerDiameter` | Outside diameter | number | 100 | min=0 max=1000000000 step=any |
| `insideMode` | Inside measurement | select | "Wall thickness" | Allowed: Wall thickness, Inside diameter |
| `wallThickness` | Wall thickness | number | 5 | min=0 max=1000000000 step=any |
| `innerDiameter` | Inside diameter | number | 90 | min=0 max=1000000000 step=any |
| `diameterUnit` | Diameter and wall unit | select | "mm" | Allowed: mm, cm, m, in, ft |
| `length` | Length per piece | number | 2 | min=0 max=1000000000 step=any |
| `lengthUnit` | Length unit | select | "m" | Allowed: mm, cm, m, in, ft |
| `quantity` | Pieces | number | 1 | min=1 max=10000 step=1 |
| `density` | Material density | number | 7850 | min=0 max=1000000 step=any |
| `densityUnit` | Density unit | select | "kg/m³" | Allowed: kg/m³, g/cm³, lb/ft³ |

### Browser-agent workflow

1. Open the human page in a browser that supports WebMCP.
2. Discover the interface exposed by that page; use its actual schema.
3. Select files on the page first when the tool requires files.
4. Call `run_current_tool` with valid input and settings.
5. Inspect the returned result or error and the displayed output. Retrieve files from the displayed download links.

Calls do not automatically copy or download results. Browser permissions still apply. Interface availability alone is not proof of successful execution.

### Planning specification

Uniform concentric hollow round sections and up to 10,000 identical pieces. No nominal-size, pipe-schedule or material-grade lookup. Nonpositive inner diameter and walls at least half the outside diameter are rejected.

This describes intended requirements. Use the implementation notes, interface schema and observed output to determine current support.

### Complete machine-readable capability record

```json
{
  "id": "pipe-weight-calculator",
  "category": "calculators",
  "built": true,
  "requirements": "Uniform concentric hollow round sections and up to 10,000 identical pieces. No nominal-size, pipe-schedule or material-grade lookup. Nonpositive inner diameter and walls at least half the outside diameter are rejected.",
  "implementation": {
    "fields": [
      {
        "key": "outerDiameter",
        "label": "Outside diameter",
        "value": 100,
        "type": "number",
        "min": 0,
        "max": 1000000000,
        "step": "any"
      },
      {
        "key": "insideMode",
        "label": "Inside measurement",
        "value": "Wall thickness",
        "type": "select",
        "values": [
          "Wall thickness",
          "Inside diameter"
        ]
      },
      {
        "key": "wallThickness",
        "label": "Wall thickness",
        "value": 5,
        "type": "number",
        "min": 0,
        "max": 1000000000,
        "step": "any",
        "showWhen": {
          "insideMode": [
            "Wall thickness"
          ]
        }
      },
      {
        "key": "innerDiameter",
        "label": "Inside diameter",
        "value": 90,
        "type": "number",
        "min": 0,
        "max": 1000000000,
        "step": "any",
        "showWhen": {
          "insideMode": [
            "Inside diameter"
          ]
        }
      },
      {
        "key": "diameterUnit",
        "label": "Diameter and wall unit",
        "value": "mm",
        "type": "select",
        "values": [
          "mm",
          "cm",
          "m",
          "in",
          "ft"
        ]
      },
      {
        "key": "length",
        "label": "Length per piece",
        "value": 2,
        "type": "number",
        "min": 0,
        "max": 1000000000,
        "step": "any"
      },
      {
        "key": "lengthUnit",
        "label": "Length unit",
        "value": "m",
        "type": "select",
        "values": [
          "mm",
          "cm",
          "m",
          "in",
          "ft"
        ]
      },
      {
        "key": "quantity",
        "label": "Pieces",
        "value": 1,
        "type": "number",
        "min": 1,
        "max": 10000,
        "step": 1
      },
      {
        "key": "density",
        "label": "Material density",
        "value": 7850,
        "type": "number",
        "min": 0,
        "max": 1000000,
        "step": "any",
        "help": "Enter density from the specific material data. This starting value is an editable example."
      },
      {
        "key": "densityUnit",
        "label": "Density unit",
        "value": "kg/m³",
        "type": "select",
        "values": [
          "kg/m³",
          "g/cm³",
          "lb/ft³"
        ]
      }
    ],
    "input": false,
    "live": true,
    "presentation": "metrics",
    "note": "Estimate the mass of a uniform hollow round section. Use measured diameters, not a nominal pipe size. Coatings, fittings and pipe contents are excluded. Changing units keeps the entered numbers. All calculations stay on your device. These estimates do not establish structural safety or code compliance.",
    "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.",
      "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 hollow round-pipe mass from measured diameters, length and material density. See mass per metre, per piece and in total.

How can we improve this tool?

Report a problem or share an idea.

Please leave out private information. Your message and the tool name go to our team via PostHog.

### How to use Pipe weight calculator

1. Enter measured outside diameter and wall thickness or inside diameter.
2. Choose length, quantity and the material's density with units.
3. Review mass per metre and total mass, then download the report.

## Useful next steps

- [Volume calculator](https://happytails.ai/en/calculators/volume-calculator/) ([Markdown](https://happytails.ai/en/calculators/volume-calculator.md))

- [Lumber board foot calculator](https://happytails.ai/en/calculators/lumber-board-foot-calculator/) ([Markdown](https://happytails.ai/en/calculators/lumber-board-foot-calculator.md))

- [Thermal expansion calculator](https://happytails.ai/en/calculators/thermal-expansion-calculator/) ([Markdown](https://happytails.ai/en/calculators/thermal-expansion-calculator.md))

## Measure the hollow section

Enter outside diameter and either wall thickness or inside diameter. These are geometric measurements, not a nominal pipe size or schedule. The inside diameter must be smaller than the outside diameter and greater than zero. A uniform concentric wall is assumed.

### Use density for the actual material

The starting density is an editable example. Replace it with the density from the specific material data. The calculator accepts kg/m³, g/cm³ or lb/ft³ and converts the dimensions consistently before calculating mass. Coatings, threads, fittings and pipe contents are excluded.

### Understand the result

The material cross-section is π × (outside diameter² − inside diameter²) ÷ 4. Multiply it by length for volume, then by density for mass. A 100 mm outside diameter tube with a 5 mm wall, 2 metre length and 7,850 kg/m³ density has a nominal mass of approximately 23.4284 kg.

### Download the mass calculation

Save CSV, text or JSON results with inside diameter, cross-section and the assumptions used. The result is mass in kilograms or pounds, rather than weight force. It is not a pressure rating, grade certification or structural design.