AirCalc Psychrometric

AirCalc Pro is a professional-grade psychrometric calculator and HVAC engineering toolkit designed for HVAC engineers, mechanical engineers, and building science professionals.

Enter any two air properties and instantly compute all eight psychrometric parameters — no internet connection required.

CORE FEATURES

• Psychrometric Calculator
Select any 2 of 8 parameters as inputs: Dry Bulb Temperature, Relative Humidity, Absolute Humidity,
Humidity Ratio, Dew Point, Wet Bulb Temperature, Enthalpy, and Specific Volume. The app instantly
calculates all remaining values.

• Interactive Psychrometric Chart
Visualize air states on a real-time psychrometric diagram. Tap or drag the state point to explore
different conditions. The chart displays relative humidity curves (10%–100%), constant enthalpy lines,
saved state points, and coil process lines with SHR direction.

• 27 Input Combinations
Supports 27 valid input pair combinations with robust solvers including direct computation and
Newton-Raphson iteration for complex pairs.

ENGINEERING TOOLS

• Load Calculator
Enter airflow rate (CFM or m³/h) with supply and return air states to calculate total, sensible, and
latent cooling/heating loads, moisture removal rate, and condensate rate.

• Mixed Air Calculator
Blend outdoor air and return air by percentage to calculate the mixed air state. Useful for AHU,
economizer, and ventilation analysis.

• Coil Process Analyzer
Analyze entering and leaving air conditions across a coil. Calculates Sensible Heat Ratio (SHR),
total/sensible/latent capacity, dehumidification status, and condensate rate.

• Save & Compare States
Save air states with custom labels. Compare any two saved states side-by-side with color-coded deltas for
all parameters. Saved states also appear as numbered points on the psychrometric chart.

• PDF Export
Generate and share professional psychrometric reports as PDF directly from the app.

SETTINGS & LOCALIZATION

• Unit Conversion: switch between °C/°F and kPa/atm
• 8 Languages: English, Japanese (日本語), Chinese (中文), Korean (한국어), Thai (ไทย), Vietnamese (Tiếng
Việt), German (Deutsch), and Spanish (Español)
• Auto-detects device language on first launch

TECHNICAL DETAILS

• Based on standard psychrometric equations (Magnus formula, ASHRAE reference methods)
• Dry bulb temperature range: -20°C to 90°C
• Standard atmospheric pressure: 101.325 kPa (adjustable)
• All calculations performed locally — fully offline
• Results in under 10 milliseconds

DESIGNED FOR

• HVAC system design and commissioning
• Indoor air quality analysis
• Building energy audits
• Mechanical engineering coursework
• Clean room and data center climate control
• Agricultural and food processing environments

AirCalc Pro delivers the accuracy of psychrometric reference tables with the convenience of a modern
mobile interface. One purchase, no subscriptions, no ads, no data collection.