🌬️ Psychrometric Sizer Tool

Calculate all moist air thermodynamic properties from any 2 inputs. Supports SI/Imperial units, barometric altitude adjustments, and real-time chart tracing.

⚡ Fortran 90 Engine Double Precision (IEEE 754) ✓ ISO / ASME Validated

Tools

📊 Solver Telemetry ● ACTIVE

👁️ Views 289

⚡ Solves 226

💾 Downloads 248 📦 Fortran Code 4.4 KB

📅 Released Jun 2026

⏱️ Latency < 1 ms

📝 Configuration

System: SI Units (Metric)

Input 1:

Value (°C):

Input 2:

Value (%):

Altitude (z): 0 m

0 m 4000 m

Barometric Pressure ($P_{atm}$):

📊 Calculated Properties

Dry-Bulb Temp ($T_{db}$) — °C

Wet-Bulb Temp ($T_{wb}$) — °C

Dew-Point Temp ($T_{dp}$) — °C

Relative Humidity ($RH$) — %

Humidity Ratio ($\omega$) — g/kg dry air

Specific Enthalpy ($h$) — kJ/kg dry air

Specific Volume ($v$) — m³/kg dry air

Degree of Saturation ($\mu$) — dimensionless

Vapor Pressure ($P_w$) — kPa

Sat. Vapor Pressure ($P_{ws}$) — kPa

📈 Psychrometric Chart Visualizer

Calculation Methodology:
Based on formulas from the ASHRAE Handbook - Fundamentals (Chapter 6). Solves the moist air relationships iteratively to a precision of $10^{-6}$.