Relative Humidity Calculator

Relative Humidity Equation

$$ \phi = \frac{p_v}{p_{vs}} \cdot 100 $$ where:

φ = Relative Humidity (%)

p_v = Partial pressure of water vapor (Pa)

p_vs = Saturation pressure of water at the same temperature (Pa)

Calculator

Property to Calculate:

Relative Humidity (φ):

Partial pressure of water vapor (p_v):

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

Result:

Equation Assumptions

Air and water vapor behave as ideal gases.
The system is in steady state.
Air and water vapour are in thermodynamic equalibrium.
The temperature distribution is uniform.