Psychrometric Calculator
Find the full state of moist air from dry bulb and either relative humidity or wet bulb, and see it on a psychrometric chart.
Free · no sign-in requiredPurpose
Find the full state of moist air from dry bulb and either relative humidity or wet bulb, and see it on a psychrometric chart.
Inputs required
Dry bulb temperature, relative humidity or wet bulb temperature, and site pressure or altitude.
Standards followed
ASHRAE Handbook – Fundamentals psychrometric equations.
Free to use. No sign-in needed.
Open the Psychrometric CalculatorEngineering reference & methodology
What you get
Humidity ratio, dew point, enthalpy, specific volume and wet bulb, with a PDF report.
Results are preliminary design guidance. Verify every value against the edition of each standard adopted by your project or authority having jurisdiction, and against manufacturer performance data, before using it in design or procurement.
Psychrometrics, cooling loads, duct & pipe sizing, pumps, cleanrooms, electrical design and PDF reports.