Humidity (Mixing) Ratio Calculator

Humidity (Mixing) Ratio Equation

$$ W = \frac{0.622 \cdot p_v}{p - p_v} $$ where:

W = Humidity Ratio (Dimensionless)

p_v = Partial pressure of water vapor (Pa)

p = Total pressure of the air (Pa)

Calculator

Property to Calculate:

Humidity Ratio (W):

Partial pressure of water vapor (p_v):

Saturation pressure of water at the same temperature (p_vs):

Result:

Equation Assumptions

Dry air and water vapor behave as ideal gases
Molecular weights remain constant.
There is no condensation.
Pressure remains uniform.