Humidity Calculator

Inputs

Ambient Temperature

Ambient Pressure

Equation

Relative Humidity %

Dewpoint (Frostpoint if < 0degC)

Mixing ratio

Vapor Pressure

Calculate

a1 Pa

a2 Pa

Saturation vapor pressure

Saturation pressure of water vapor at ambient temperature

Air density

air density at T_a, P_a

Relative Humidity %

(copied from inputs)

Dewpoint (Frostpoint if <0degC)

dew point from RH, T_a (frost point if < 0°C)

Mixing ratio

mass ratio from RH, T_a

Vapor Pressure

partial pressure of water vapor from RH, T_a

Absolute humidity

vapor density from DP, T_a