Health

Body Fat Calculator (US Navy)

Calculate body fat percentage using the US Navy method

json· JSON resultOpen tool

Quick start

Call this tool from your code in three languages.

cURL

curl -X POST 'https://api.elysiatools.com/en/api/tools/body-fat-calculator-us-navy' \
  -H 'Content-Type: application/json' \
  -d '{"gender":"male","waist":80,"neck":38,"height":175,"hip":100}'

API reference

Send a POST request with your inputs as JSON. File parameters require a separate upload first.

Endpoint

HTTP

POST https://api.elysiatools.com/en/api/tools/body-fat-calculator-us-navy

Parameters

Name	Type	Required	Description
gender	select	Yes	—
waist	number	Yes	—
neck	number	Yes	—
height	number	Yes	—
hip	number	No	—

Response format

MCP integration

Add this tool to your Model Context Protocol server so AI agents can list and call it.

Server configuration

Add this block to your MCP client configuration:

mcp.json

{
  "mcpServers": {
    "elysiatools-body-fat-calculator-us-navy": {
      "name": "body-fat-calculator-us-navy",
      "description": "Calculate body fat percentage using the US Navy method",
      "baseUrl": "https://api.elysiatools.com/mcp/sse?toolId=body-fat-calculator-us-navy",
      "command": "",
      "args": [],
      "env": {},
      "isActive": true,
      "type": "sse"
    }
  }
}

List available tools

After connecting to the SSE endpoint, list the exposed tools:

tools/list

{
  "jsonrpc": "2.0",
  "id": 1,
  "method": "tools/list"
}

Call this tool

Invoke the tool by its id, passing arguments built from its parameters:

tools/call

{
  "jsonrpc": "2.0",
  "id": 2,
  "method": "tools/call",
  "params": {
    "name": "body-fat-calculator-us-navy",
    "arguments": {
  "gender": "male",
  "waist": 80,
  "neck": 38,
  "height": 175,
  "hip": 100
}
  }
}

Chain multiple tools in one session with a comma-separated toolId list, e.g. /mcp/sse?toolId=png-to-webp,jpg-to-webp,gif-to-webp (max 20).

Questions or issues? Contact [email protected]

Browse tools Open tool

Name

Type

Required

Description

gender

select

Yes

—

waist

number

Yes

—

neck

number

Yes

—

height

number

Yes

—

hip

number

—

{ "mcpServers": { "elysiatools-body-fat-calculator-us-navy": { "name": "body-fat-calculator-us-navy", "description": "Calculate body fat percentage using the US Navy method", "baseUrl": "https://api.elysiatools.com/mcp/sse?toolId=body-fat-calculator-us-navy", "command": "", "args": [], "env": {}, "isActive": true, "type": "sse" } } }

{ "jsonrpc": "2.0", "id": 2, "method": "tools/call", "params": { "name": "body-fat-calculator-us-navy", "arguments": { "gender": "male", "waist": 80, "neck": 38, "height": 175, "hip": 100 } } }