# Compressibility Factor

Written by Jerry Ratzlaff on . Posted in Dimensionless Numbers

Compressibility factor, abbreviated as z, a dimensionless number, also called compression factor or gas deviation factor, corrects for deviation from the ideal gas law to account for the real gases behavior.

## Compressibility Factor formula

 $$\large{ z = \frac{ p \; V }{ n \; R \; T } }$$

### Where:

$$\large{ z }$$ = compressibility factor for a given gas

$$\large{ n }$$ = number of moles of gas

$$\large{ p }$$ = pressure of gas

$$\large{ R }$$ = specific gas constant (gas constant)

$$\large{ T }$$ = temperature of gas

$$\large{ V }$$ = volume of gas