About this app
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.
Latest release
What’s New
Bug fixes and performance improvements.
Audience growth
Ratings growth
Baseline captured. Growth appears after the crawler observes a changed rating count.
Momentum comes from crawler snapshots for the tracked storefront. “Viral growth signal” means unusually fast recent rating gains; it is an indicator, not download data.
Price tracking
Price intelligence
First snapshot captured. The trend line starts after the next crawler price observation.
- First observed Aug 23, 2026 · 6:09 AM $1.99
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