Psychrometric Chart

SI  ·  ASHRAE correlations  ·  sea-level default

State Point Input

Derived Properties

Rel. Humidity
–%
Wet Bulb
–°C
Dew Point
–°C
Humidity Ratio
–g/kg
Enthalpy
–kJ/kg
Sp. Volume
–m³/kg
Vapor Pressure / Saturation Pressure
–kPa
Saturation (100% RH) RH curves (10–90%) State point
Orthogonal (unskewed) humidity-ratio vs. dry-bulb-temperature chart. Saturation pressure via the ASHRAE 2017 correlations for water and ice; wet-bulb and dew-point solved iteratively. Chart is cropped at 30 g/kg humidity ratio, matching the standard SI ASHRAE chart range.