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Humid Air Calculator and Psychrometric Chart

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Browser-based fluid properties and psychrometric tools for engineers.

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Altitude
Atmospheric Pressure
P
Dry-bulb Temperature
Tdb
Wet-bulb Temperature
Twb
Relative Humidity
RH
Dew Point Temperature
Tdp
Humidity Ratio
W
Enthalpy
Hda
Status
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Humid air calculator and psychrometric chart

Calculate RH, dew point, wet-bulb temperature, humidity ratio, enthalpy, and chart points for HVAC air states.
Use it to convert between dry-bulb temperature, RH, dew point, wet-bulb temperature, humidity ratio, and moist-air enthalpy.
Psychrometric chartDew pointWet-bulb temperatureRH vs Humidity Ratio (W)Specific humidity vs humidity ratioMixing OA & RAView all Wiki topics
Chart