Math & Numbers

Specific Strength & Specific Modulus Calculator

Specific strength = σ/ρ and specific modulus = E/ρ (optional E). Enter strength in MPa and density in g/cm³; output in N·m/kg (also as kN·m/kg). The figure of merit for lightweight design — a material with high strength but high density (e.g. tungsten) often loses to a lighter alloy. Typical values: Ti-6Al-4V ≈ 210 kN·m/kg, Al 7075 ≈ 180, carbon steel ≈ 50–90, CFRP ≈ 1000+.

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/specific-strength-calculator' \
  -H 'Content-Type: application/json' \
  -d '{"strength":950,"density":4.43,"youngsModulus":114000,"decimalPlaces":2}'

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/specific-strength-calculator

Parameters

Name	Type	Required	Description
strength	number	Yes	Tensile or yield strength in MPa. E.g. Ti-6Al-4V ≈ 950, Al 7075-T6 ≈ 503, AISI 4340 ≈ 1280, carbon-fiber composite ≈ 1500.
density	number	Yes	Density in g/cm³. E.g. titanium ≈ 4.43, aluminum ≈ 2.81, steel ≈ 7.85, CFRP ≈ 1.5, tungsten ≈ 19.3.
youngsModulus	number	No	Young's modulus in MPa. Optional — when given, specific modulus E/ρ is also reported. E.g. titanium ≈ 114000, aluminum ≈ 71700, steel ≈ 200000, CFRP ≈ 150000.
decimalPlaces	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-specific-strength-calculator": {
      "name": "specific-strength-calculator",
      "description": "Specific strength = σ/ρ and specific modulus = E/ρ (optional E). Enter strength in MPa and density in g/cm³; output in N·m/kg (also as kN·m/kg). The figure of merit for lightweight design — a material with high strength but high density (e.g. tungsten) often loses to a lighter alloy. Typical values: Ti-6Al-4V ≈ 210 kN·m/kg, Al 7075 ≈ 180, carbon steel ≈ 50–90, CFRP ≈ 1000+.",
      "baseUrl": "https://api.elysiatools.com/mcp/sse?toolId=specific-strength-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": "specific-strength-calculator",
    "arguments": {
  "strength": 950,
  "density": 4.43,
  "youngsModulus": 114000,
  "decimalPlaces": 2
}
  }
}

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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Specific Strength & Specific Modulus Calculator

json· JSON resultOpen tool

curl -X POST 'https://api.elysiatools.com/en/api/tools/specific-strength-calculator' \ -H 'Content-Type: application/json' \ -d '{"strength":950,"density":4.43,"youngsModulus":114000,"decimalPlaces":2}'

Name

Type

Required

Description

strength

number

Yes

Tensile or yield strength in MPa. E.g. Ti-6Al-4V ≈ 950, Al 7075-T6 ≈ 503, AISI 4340 ≈ 1280, carbon-fiber composite ≈ 1500.

density

number

Yes

Density in g/cm³. E.g. titanium ≈ 4.43, aluminum ≈ 2.81, steel ≈ 7.85, CFRP ≈ 1.5, tungsten ≈ 19.3.

youngsModulus

number

Young's modulus in MPa. Optional — when given, specific modulus E/ρ is also reported. E.g. titanium ≈ 114000, aluminum ≈ 71700, steel ≈ 200000, CFRP ≈ 150000.

decimalPlaces

number

—

{ "mcpServers": { "elysiatools-specific-strength-calculator": { "name": "specific-strength-calculator", "description": "Specific strength = σ/ρ and specific modulus = E/ρ (optional E). Enter strength in MPa and density in g/cm³; output in N·m/kg (also as kN·m/kg). The figure of merit for lightweight design — a material with high strength but high density (e.g. tungsten) often loses to a lighter alloy. Typical values: Ti-6Al-4V ≈ 210 kN·m/kg, Al 7075 ≈ 180, carbon steel ≈ 50–90, CFRP ≈ 1000+.", "baseUrl": "https://api.elysiatools.com/mcp/sse?toolId=specific-strength-calculator", "command": "", "args": [], "env": {}, "isActive": true, "type": "sse" } } }

{ "jsonrpc": "2.0", "id": 2, "method": "tools/call", "params": { "name": "specific-strength-calculator", "arguments": { "strength": 950, "density": 4.43, "youngsModulus": 114000, "decimalPlaces": 2 } } }