Math & Numbers

Torque Unit Converter (N·m / lbf·ft / kgf·m / lbf·in)

Convert torque (moment of force) between N·m (SI base), lbf·ft (pound-foot), kgf·m (kilogram-force-metre), and lbf·in (pound-inch). Factors based on standard gravity g₀ = 9.80665 m/s² and 1 lbf = 4.4482216152605 N. Converts via N·m to the target unit and also lists the equivalent value in all four units for reference. Used for mechanical specs, automotive, and fastener tightening torque.

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/torque-unit-converter' \
  -H 'Content-Type: application/json' \
  -d '{"inputUnit":"N·m","value":100,"outputUnit":"lbf·ft","decimalPlaces":4}'

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/torque-unit-converter

Parameters

Name	Type	Required	Description
inputUnit	select	No	—
value	number	Yes	Torque value in the selected Input unit. Can be negative (e.g. counterclockwise / loosening).
outputUnit	select	No	—
decimalPlaces	number	No	—

Response format

JSON result

JSON

{
  "key": {...},
  "metadata": {
    "key": "value"
  },
  "error": "Error message (optional)",
  "message": "Notification message (optional)"
}

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-torque-unit-converter": {
      "name": "torque-unit-converter",
      "description": "Convert torque (moment of force) between N·m (SI base), lbf·ft (pound-foot), kgf·m (kilogram-force-metre), and lbf·in (pound-inch). Factors based on standard gravity g₀ = 9.80665 m/s² and 1 lbf = 4.4482216152605 N. Converts via N·m to the target unit and also lists the equivalent value in all four units for reference. Used for mechanical specs, automotive, and fastener tightening torque.",
      "baseUrl": "https://api.elysiatools.com/mcp/sse?toolId=torque-unit-converter",
      "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": "torque-unit-converter",
    "arguments": {
  "inputUnit": "N·m",
  "value": 100,
  "outputUnit": "lbf·ft",
  "decimalPlaces": 4
}
  }
}

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).

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Torque Unit Converter (N·m / lbf·ft / kgf·m / lbf·in)

json· JSON resultOpen tool

curl -X POST 'https://api.elysiatools.com/en/api/tools/torque-unit-converter' \ -H 'Content-Type: application/json' \ -d '{"inputUnit":"N·m","value":100,"outputUnit":"lbf·ft","decimalPlaces":4}'

Name

Type

Required

Description

inputUnit

select

—

value

number

Yes

Torque value in the selected Input unit. Can be negative (e.g. counterclockwise / loosening).

outputUnit

select

—

decimalPlaces

number

—

{ "mcpServers": { "elysiatools-torque-unit-converter": { "name": "torque-unit-converter", "description": "Convert torque (moment of force) between N·m (SI base), lbf·ft (pound-foot), kgf·m (kilogram-force-metre), and lbf·in (pound-inch). Factors based on standard gravity g₀ = 9.80665 m/s² and 1 lbf = 4.4482216152605 N. Converts via N·m to the target unit and also lists the equivalent value in all four units for reference. Used for mechanical specs, automotive, and fastener tightening torque.", "baseUrl": "https://api.elysiatools.com/mcp/sse?toolId=torque-unit-converter", "command": "", "args": [], "env": {}, "isActive": true, "type": "sse" } } }

{ "jsonrpc": "2.0", "id": 2, "method": "tools/call", "params": { "name": "torque-unit-converter", "arguments": { "inputUnit": "N·m", "value": 100, "outputUnit": "lbf·ft", "decimalPlaces": 4 } } }