Henry's Law Constant Calculator – Calculate kH from Gas Solubility



Input Parameters
Calculated Constant
Henry's Law Constant
0.00
Formula Used KH = p / x

About Henry's Law Constant Calculator

The Henry’s law constant is a useful number for describing how a gas behaves when it comes into contact with a liquid. It connects the gas’s partial pressure with the amount that dissolves in the liquid at equilibrium. A larger or smaller value can indicate very different gas-solvent behavior, depending on the convention used for the constant.

The Henry’s Law Constant Calculator helps determine this value when gas pressure and dissolved concentration are known. It can be particularly useful when working with experimental measurements rather than a constant already provided in a textbook.

One important catch is that Henry’s law has several commonly used forms. Some write the relationship as concentration divided by pressure, while others use pressure divided by concentration. Because of this, the units of the constant are just as important as its numerical value.

This tool can be useful in physical chemistry, environmental studies, laboratory analysis, and gas-liquid equilibrium calculations. Before entering data, check which definition of Henry’s constant your source or experiment uses. Temperature should also be kept consistent because the constant can vary significantly with temperature.