Math & Numbers

Gas Law Calculator

Solve pressure, volume, temperature, or moles with the Ideal Gas Law (PV=nRT) or Combined Gas Law; also gas density and molar mass.

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/gas-law-calculator' \
  -H 'Content-Type: application/json' \
  -d '{"mode":"ideal","runits":"L·atm/mol·K","tempUnit":"kelvin","pressure":1,"volume":"","temperature":273.15,"moles":1,"p1":0,"v1":0,"t1":0,"p2":0,"v2":0,"t2":0,"molarMass":0,"mass":0,"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/gas-law-calculator

Parameters

Name	Type	Required	Description
mode	select	No	—
runits	select	No	Determines the pressure/volume units you must enter. Temperature is always converted to Kelvin internally.
tempUnit	select	No	—
pressure	number	No	Leave blank to solve for pressure in Ideal mode.
volume	number	No	Leave blank to solve for volume in Ideal mode.

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-gas-law-calculator": {
      "name": "gas-law-calculator",
      "description": "Solve pressure, volume, temperature, or moles with the Ideal Gas Law (PV=nRT) or Combined Gas Law; also gas density and molar mass.",
      "baseUrl": "https://api.elysiatools.com/mcp/sse?toolId=gas-law-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": "gas-law-calculator",
    "arguments": {
  "mode": "ideal",
  "runits": "L·atm/mol·K",
  "tempUnit": "kelvin",
  "pressure": 1,
  "volume": "",
  "temperature": 273.15,
  "moles": 1,
  "p1": 0,
  "v1": 0,
  "t1": 0,
  "p2": 0,
  "v2": 0,
  "t2": 0,
  "molarMass": 0,
  "mass": 0,
  "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).

Questions or issues? Contact [email protected]

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