Math & Numbers
Dew Point Calculator HVAC (Magnus Equation)
Compute the air dew-point temperature from dry-bulb temperature and a humidity reading using the Magnus saturation-pressure equation: P_ws(T) = 0.6108·exp(17.27·T/(T+237.3)), P_w = φ·P_ws, T_dp = 237.3·ln(P_w/0.6108) / (17.27 − ln(P_w/0.6108)). Also returns the saturation vapour pressure P_ws, actual partial pressure P_w, and absolute humidity ρ_v (kg/m³). Three input modes: relative humidity φ (natural ventilated), August natural-ventilated wet-bulb T_w, or aspirated (Assmann) wet-bulb T_wa. Temperature in °C/K/°F; all reported temperatures are in the selected Temperature Unit.
Quick start
Call this tool from your code in three languages.
curl -X POST 'https://api.elysiatools.com/en/api/tools/dew-point-calculator-hvac' \
-H 'Content-Type: application/json' \
-d '{"dryBulb":25,"tempUnit":"°C","humidityMode":"rh","humidityValue":50,"pressure":101.325,"pressureUnit":"kPa","decimalPlaces":4}'API reference
Send a POST request with your inputs as JSON. File parameters require a separate upload first.
Endpoint
POST https://api.elysiatools.com/en/api/tools/dew-point-calculator-hvacParameters
| Name | Type | Required | Description |
|---|---|---|---|
| dryBulb | number | Yes | Dry-bulb (ambient air) temperature, in the selected Temperature Unit. |
| tempUnit | select | No | — |
| humidityMode | select | No | What the Humidity Value represents: relative humidity (φ), August natural-ventilated wet-bulb (T_w), or aspirated/Assmann wet-bulb (T_wa). |
| humidityValue | number | Yes | Value of the selected Humidity Input Mode. RH in % (0–100); wet-bulb temperatures in the selected Temperature Unit. |
| pressure | number |
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:
{
"mcpServers": {
"elysiatools-dew-point-calculator-hvac": {
"name": "dew-point-calculator-hvac",
"description": "Compute the air dew-point temperature from dry-bulb temperature and a humidity reading using the Magnus saturation-pressure equation: P_ws(T) = 0.6108·exp(17.27·T/(T+237.3)), P_w = φ·P_ws, T_dp = 237.3·ln(P_w/0.6108) / (17.27 − ln(P_w/0.6108)). Also returns the saturation vapour pressure P_ws, actual partial pressure P_w, and absolute humidity ρ_v (kg/m³). Three input modes: relative humidity φ (natural ventilated), August natural-ventilated wet-bulb T_w, or aspirated (Assmann) wet-bulb T_wa. Temperature in °C/K/°F; all reported temperatures are in the selected Temperature Unit.",
"baseUrl": "https://api.elysiatools.com/mcp/sse?toolId=dew-point-calculator-hvac",
"command": "",
"args": [],
"env": {},
"isActive": true,
"type": "sse"
}
}
}List available tools
After connecting to the SSE endpoint, list the exposed tools:
{
"jsonrpc": "2.0",
"id": 1,
"method": "tools/list"
}Call this tool
Invoke the tool by its id, passing arguments built from its parameters:
{
"jsonrpc": "2.0",
"id": 2,
"method": "tools/call",
"params": {
"name": "dew-point-calculator-hvac",
"arguments": {
"dryBulb": 25,
"tempUnit": "°C",
"humidityMode": "rh",
"humidityValue": 50,
"pressure": 101.325,
"pressureUnit": "kPa",
"decimalPlaces": 4
}
}
}