Health
Lean Body Mass Calculator (Boer / Hume / James)
Estimate your lean body mass (LBM) from sex, age, weight and height using three clinical formulas side by side, with derived body-fat percentage.
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Quick start
Call this tool from your code in three languages.
cURL
curl -X POST 'https://api.elysiatools.com/en/api/tools/lean-body-mass-calculator' \
-H 'Content-Type: application/json' \
-d '{"sex":"male","age":30,"weight":70,"weightUnit":"kg","height":175,"heightUnit":"cm","precision":1}'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/lean-body-mass-calculatorParameters
| Name | Type | Required | Description |
|---|---|---|---|
| sex | select | No | — |
| age | number | Yes | — |
| weight | number | Yes | — |
| weightUnit | select | No | — |
| height | number | Yes | — |
| heightUnit |
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-lean-body-mass-calculator": {
"name": "lean-body-mass-calculator",
"description": "Estimate your lean body mass (LBM) from sex, age, weight and height using three clinical formulas side by side, with derived body-fat percentage.",
"baseUrl": "https://api.elysiatools.com/mcp/sse?toolId=lean-body-mass-calculator",
"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": "lean-body-mass-calculator",
"arguments": {
"sex": "male",
"age": 30,
"weight": 70,
"weightUnit": "kg",
"height": 175,
"heightUnit": "cm",
"precision": 1
}
}
}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]