HVAC Psychrometric Calculator

HVAC Psychrometric Calculator is the professional tool for HVAC technicians, engineers, and contractors. Calculate all psychrometric air properties from any two known values using ASHRAE Handbook equations — the industry standard for air conditioning design, humidity control, and system diagnostics.

INPUT MODES (Choose Any Two):
Dry Bulb + Wet Bulb — Classic psychrometric measurement with sling psychrometer
Dry Bulb + Dew Point — From condensation temperature (moisture indicator)
Dry Bulb + Relative Humidity — Most common field measurement using digital meters

CALCULATED AIR PROPERTIES:
Dry Bulb Temperature (°F) — Sensible temperature measurement
Wet Bulb Temperature (°F) — Evaporative cooling potential indicator
Dew Point Temperature (°F) — Moisture content and condensation risk
Relative Humidity (%) — Moisture percentage in air
Humidity Ratio (grains/lb) — Absolute moisture quantity for dehumidification
Enthalpy (BTU/lb) — Total heat content for system load calculations
Specific Volume (ft³/lb) — Air density for ductwork and ventilation
Vapor Pressure (psia) — Partial pressure of water vapor in air

PROFESSIONAL FEATURES:
Altitude Correction — Adjust calculations for elevation above sea level (up to 10,000 ft)
ASHRAE Formulas — Based on ASHRAE Handbook of Fundamentals standard equations
Accurate Property Calculations — All 8 air properties calculated instantly
100% Offline Operation — No internet connection required for field work
English & Spanish Support — Bilingual interface for diverse teams

WHY HVAC TECHNICIANS USE THIS CALCULATOR:
Faster psychrometric calculations than charts and slide rules
Quick humidity control diagnostics on service calls
Accurate dehumidification load estimation
Prevents oversized/undersized dehumidifier selection
Verifies air conditioning system moisture removal
Confirms proper ventilation humidity levels
Energy efficiency optimization through humidity control

HVAC APPLICATIONS:
Cooling Load Analysis — Include latent cooling requirements
Dehumidification System Design — Calculate moisture removal needs
Indoor Air Quality Assessment — Verify humidity comfort range (40-60% RH)
Building Commissioning — Validate humidity control performance
Humidification Calculations — Winter humidity level maintenance
Ventilation Design — Ensure proper humidity management
Data Center Cooling — Strict humidity control requirements

PERFECT FOR:
HVAC technicians on air conditioning service calls
HVAC design engineers sizing cooling systems
Refrigeration mechanics calculating moisture loads
AC contractors estimating dehumidification needs
HVAC apprentices learning psychrometric analysis
Building maintenance engineers monitoring humidity
Indoor air quality (IAQ) professionals
Commercial HVAC system commissioning
Energy auditors optimizing system performance

Based on ASHRAE Handbook of Fundamentals psychrometric calculations.

Part of HVACTools Suite — professional HVAC technician and air conditioning calculator collection for field diagnostics and system design.