Psychrometric Calculator
Calculate humidity ratio, dew point, enthalpy, and specific volume from dry-bulb temperature and relative humidity
Psychrometric Calculator
Moist air properties using the Antoine equation for saturation pressure
Note: Antoine equation valid for T_db −50 to 100°C
Psychrometric Properties
Saturation Pressure P_sat
3.1579 kPa
Partial Pressure P_w
1.8948 kPa
Humidity Ratio ω
0.01185 kg/kg
= 11.853 g/kg
Dew Point T_dp
16.71 °C
Wet-Bulb Temp T_wb
-1801.54 °C
Enthalpy h
55.35 kJ/kg
Specific Volume v
0.8607 m³/kg
Antoine Equation
log₁₀(P_sat) = 8.07131 − 1730.63/(233.426 + T)
= 8.07131 − 1730.63/(233.426 + 25.00) = 3.1579 kPa
How to Use This Calculator
Enter your input values
Fill in all required input fields for the Psychrometric Calculator. Most fields include unit selectors so you can work in your preferred unit system.
Review your inputs
Double-check that all values are correct and that you have selected the right units for each field. Incorrect units are the most common source of calculation errors.
Read the results
The Psychrometric Calculator instantly computes the output and displays results with units. All calculations happen in your browser — no loading time and no data sent to a server.
Formula Reference
Psychrometric Calculator Formula
See calculator inputs for the governing equation
Variables: All variables and their units are labeled in the calculator interface above.
When to Use This Calculator
- •Use the Psychrometric Calculator when solving homework or exam problems that require quick numerical verification of your hand calculations.
- •Use it during the design phase to rapidly iterate on parameters before running detailed finite element simulations.
- •Use it when reviewing a colleague's calculation or checking a vendor's data sheet for plausibility.
- •Use it to generate reference data for a technical report or presentation without manual computation.
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