Psychrometric Chart
Interactive moist-air chart: hover for state-point values, click to place anchors A–D, toggle property lines.
Pressure (kPa)
T min (°C)
T max (°C)
W max (g/kg)
y-axis units
g / kg dry air
mole fraction
Relative humidity (%)
Wet-bulb temp (°C)
Specific volume (m³/kg d.a.)
Enthalpy (kJ/kg d.a.)
Anchor points
Click the chart to place A, B, C, D in turn. Drag a marker to move it, or type values below. The process path chains the placed points in order.
A
T (°C)
RH (%)
B
T (°C)
RH (%)
C
T (°C)
RH (%)
D
T (°C)
RH (%)
Clear points
⧉ Copy point data
⬇ Download chart PNG
⬇ Download standalone app