# Waist to Hip Ratio Calculator API

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

Waist-to-hip ratio with WHO risk category, body shape pattern, and the waist target for a healthy ratio.

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

- Slug: `waist-to-hip-ratio-calculator`
- Category: `health`
- 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/waist-to-hip-ratio-calculator/

## Endpoint

`POST https://api.miniwebtool.com/v1/tools/waist-to-hip-ratio-calculator/run`

## Request body

| Field | Type | Required | Description |
| --- | --- | --- | --- |
| `waist` | `float` | no | Waist circumference at the narrowest point |
| `hip` | `float` | no | Hip circumference at the widest point |
| `gender` | `str` | no | female | male Choices: female, male |
| `unit` | `str` | no | cm | inches Choices: cm, inches |

## Example request

```json
{
  "waist": 75,
  "hip": 97,
  "gender": "female",
  "unit": "cm"
}
```

## cURL

```bash
curl -X POST https://api.miniwebtool.com/v1/tools/waist-to-hip-ratio-calculator/run \
  -H 'Authorization: Bearer mwt_live_YOUR_KEY' \
  -H 'Content-Type: application/json' \
  -d '{"waist":75,"hip":97,"gender":"female","unit":"cm"}'
```

## Response envelope

```json
{
  "request_id": "01K...",
  "tool": "waist-to-hip-ratio-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 Waist to Hip Ratio Calculator API do?

Waist-to-hip ratio with WHO risk category, body shape pattern, and the waist target for a healthy ratio. 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.