# Drywall Calculator API

> For the complete documentation index, see [llms.txt](/llms.txt).

Drywall sheets, joint compound, tape, and screws needed for walls and ceilings with a waste allowance.

Use this endpoint to add the tool to your app, site, workflow, or agent without rebuilding formulas, validation, examples, and docs.

- Slug: `drywall-calculator`
- Category: `construction`
- Version: `2026-04-22`
- Credits per successful call: 1
- Starts on: free
- Max payload: 65536 bytes
- Privacy mode: `hash_only`
- Available on: free, starter, pro, business, scale
- Browser tool: https://miniwebtool.com/drywall-calculator/

## Endpoint

`POST https://api.miniwebtool.com/v1/tools/drywall-calculator/run`

## Request body

| Field | Type | Required | Description |
| --- | --- | --- | --- |
| `unit_system` | `str` | no | imperial | metric Choices: imperial, metric |
| `sheet_size` | `str` | no | 4x8 | 4x10 | 4x12 | 1.2x2.4 | 1.2x3.0 Choices: 4x8, 4x10, 4x12, 1.2x2.4, 1.2x3.0 |
| `wall_area` | `float` | no | Total wall area (sq ft or sq m) |
| `ceiling_area` | `float` | no |  |
| `waste_percent` | `float` | no |  |

## Example request

```json
{
  "unit_system": "imperial",
  "sheet_size": "4x8",
  "wall_area": 352,
  "ceiling_area": 120,
  "waste_percent": 10
}
```

## cURL

```bash
curl -X POST https://api.miniwebtool.com/v1/tools/drywall-calculator/run \
  -H 'Authorization: Bearer mwt_live_YOUR_KEY' \
  -H 'Content-Type: application/json' \
  -d '{"unit_system":"imperial","sheet_size":"4x8","wall_area":352,"ceiling_area":120,"waste_percent":10}'
```

## Response envelope

```json
{
  "request_id": "01K...",
  "tool": "drywall-calculator",
  "tool_version": "2026-04-22",
  "credits_used": 1,
  "result": {}
}
```

## Errors

Errors are RFC 7807 `application/problem+json`. Branch on `code`, not `title`.

## MCP

Agents can discover and call this tool through `https://api.miniwebtool.com/mcp` or `https://api.miniwebtool.com/v1/mcp` using MCP `tools/list` and `tools/call`.

## Frequently asked

### What does the Drywall Calculator API do?

Drywall sheets, joint compound, tape, and screws needed for walls and ceilings with a waste allowance. Use it to add this utility without rebuilding formulas, validation, examples, and documentation.

### How much does one call cost?

1 credit per successful call. Failed calls do not bill.

### What parameters are required?

Required fields: (none). Full schema at `https://api.miniwebtool.com/v1/openapi.json`.

### Is this deterministic?

Yes. Same input, same output. Tool version: 2026-04-22.