Enter the pressure, volume, number of moles, and temperature into the calculator to determine the compressibility factor of a non-ideal gas.

Compressibility Formula

The following formula is used to calculate the compressibility factor of a gas.

Z = P * V / (n * R * T)

  • Where Z is the compressibility factor
  • P is the pressure (pascals)
  • V is the volume (m^3)
  • n is the number of moles
  • R is the gas constant (8.31432*10^3)
  • T is the temperature (K)

Compressibility Definition

Compressibility, in this case, the compressibility factor, is defined as the rate at which a material changes in volume under a force or pressure.

Compressibility Example

How to calculate compressibility?

  1. First, determine the pressure.

    Measure the pressure acting on the material.

  2. Next, determine the volume of the material.

    Calculate the total volume of the gas under that pressure.

  3. Next, determine the number of moles.

    Calculate the total number of moles of the gas.

  4. Next, determine the temperature.

    Calculate or measure the temperature of the gas.

  5. Finally, calculate the compressibility factor.

    Calculate the compressibility factor using the equation above.


What is compressibility?

Compressibility is a measure of a material or gasses ability to compress under a certain force or pressure.

What is the compressibility factor?

This factor is a ratio of the pressure and volume to the moles and temperature of a gas. It represents the compressibility of the gas.

How is compressibility calculated?

Compressibility is calculated using the ideal gas formula and re-arranging the values to create a ratio.

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compressibility formula