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Psychrometrics calculator     psychrometrics_fading_icon_ani.gif psychrometric_chart_icon.gif Psychrometrics Chart pdf_icon.gif spacer_transparent.gifChange background

Enter Dry Bulb temperature, then Wet Bulb temperature or Relative Humidity %

Dry Bulb  °C
Wet Bulb  °C
Altitude  m asl
RH  %
Dewpoint  °C

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Enthalpy  kJ/kg
Density  kg/m³
Specific Volume  m³/kg
Atmospheric Pressure  Pa
Humidity Ratio  kg/kg
Partial Vapour Pressure  Pa
Saturated Vapour Pressure Pa

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Please note:
Insignificant differences between chart data and calculator results may occur due to interpolation & rounding.

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Procedure developed by Jacob Knight - Based on ASHRAE Fundamentals (SI) 2017. All rights acknowledged.