Partial Pressure Calculator

Total Pressure (TP):

Mole Fraction:


About Partial Pressure Calculator (Formula)

A Partial Pressure Calculator is a valuable tool in chemistry and physics, used to determine the partial pressures of gases in a mixture. This is especially important in various scientific and industrial applications, such as chemical reactions, gas analysis, and the operation of equipment involving gas mixtures. The concept of partial pressure is based on Dalton’s Law of Partial Pressures, which states that in a mixture of non-reacting gases, the total pressure is the sum of the partial pressures of each individual gas component.

The formula for calculating the partial pressure of a specific gas in a mixture is as follows:

Partial Pressure (P_gas) = Mole Fraction (X_gas) × Total Pressure (P_total)


  • Partial Pressure (P_gas) is the pressure exerted by a specific gas component in the mixture, typically measured in atmospheres (atm), pascals (Pa), or other pressure units.
  • Mole Fraction (X_gas) is the ratio of the number of moles of the specific gas to the total number of moles in the mixture. It is dimensionless and typically represented as a decimal or a fraction.
  • Total Pressure (P_total) is the overall pressure of the gas mixture, measured in the same units as the partial pressure.

This formula is fundamental for understanding the behavior of gas mixtures, as it allows you to determine the contribution of each gas component to the total pressure. It is particularly useful when dealing with gases with different properties or when monitoring the concentration of specific gases in a mixture.

The Partial Pressure Calculator simplifies the calculation of partial pressures, especially in complex gas mixtures. Scientists, chemists, and engineers often use it to analyze and optimize various processes, such as chemical reactions, gas collection, and gas quality assessment.

In practical applications, this calculator is particularly crucial in industries like pharmaceuticals, environmental monitoring, and petrochemicals, where precise control of gas mixtures is essential. It aids in ensuring the safety, efficiency, and quality of processes involving gases.