Moist Air - Specific vs. Relative Humidity

Specific humidity of moist air vs. relative humidity, water vapor and air density. Calculate specific humidity (humidity ratio) using relative humidity, water vapor density, and air density.

Calculator

Inputs

Relative Humidity (φ) (%)

Water Vapor Density (ρws) (kg/m³)

Air Density (ρ) (kg/m³)

Results

Specific Humidity (x)-- kg_h2o/kg_dry_air

Relative Humidity (%)	Water Vapor Density (kg/m³)	Air Density (kg/m³)	Specific Humidity (kg_h2o/kg_dry_air)
30	0.008	1.2	0.00414
40	0.01	1.2	0.00552
50	0.013	1.2	0.00717
60	0.015	1.2	0.00862
70	0.018	1.2	0.01007
80	0.02	1.2	0.01152
90	0.023	1.2	0.01297
100	0.025	1.2	0.01442