In chemistry, Henry's law is one of the gas laws formulated by William Henry in 1803. It states that: At a constant temperature, the amount of a given gas that dissolves in a given type and volume of liquid is directly proportional to the partial pressure of that gas in equilibrium with that liquid. Henry's gas law wiki article

Solve for	Equations
kH,px
x
P
kH,pc
C
kH,cp
Caq
Cgas
kH,cc

Pressure (P)		atmosphere (standard) atmosphere (technical) bar barye (cgs unit) centimetre of mercury centimetre of water (4 C) foot of mercury (conventional) foot of water (39.2 F) inch of mercury (conventional) inch of water (39.2 F) kilogram-force per square millimetre kip per square inch micron (micrometre) of mercury millimetre of mercury millimetre of water (3.98 C) pascal (SI unit) pieze (mts unit) pound per square foot pound per square inch poundal per square foot short ton per square foot torr
Concentration (C)		mol/L
Concentration (Caq)		mol/L
Concentration (Cgas)		mol/L
Mole fraction of gas (x)
Henry's law constant (kH,cc)	O2 - 3.18e-2 H2 - 1.91e-2 CO2 - 8.32e-1 N2 - 1.49e-2 He - 9.05e-3 Ne - 1.10e-2 Ar - 3.43e-2 CO - 2.32e-2
Henry's law constant (kH,cp)	O2 - 1.28e-8 H2 - 7.70e-9 CO2 - 3.36e-7 N2 - 6.02e-9 He - 3.65e-9 Ne - 4.44e-9 Ar - 1.38e-8 CO - 9.38e-9	mol/L*Pa
Henry's law constant (kH,pc)	O2 - 7.79e+7 H2 - 1.30e+8 CO2 - 2.98e+6 N2 - 1.66e+8 He - 2.74e+8 Ne - 2.25e+8 Ar - 7.24e+7 CO - 1.07e+8	L*Pa/mol
Henry's law constant (kH,px)	O2 - 4.32e+9 H2 - 7.19e+9 CO2 - 1.65e+8 N2 - 9.20e+9 He - 1.52e+10 Ne - 1.25e+10 Ar - 4.01e+9 CO - 5.91e+9	Pa