# Compressibility Factor

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

$$\large{ Z = \frac{p \; V}{n \; R \; T} }$$
Symbol English Metric
$$\large{ Z }$$ = compressibility factor $$\large{ dimensionless }$$
$$\large{ n }$$ = number of moles $$\large{ dimensionless }$$
$$\large{ p }$$ = pressure $$\large{\frac{lbf}{in^2}}$$ $$\large{Pa}$$
$$\large{ R }$$ = specific gas constant $$\large{\frac{lbf-ft}{lbm-R}}$$  $$\large{\frac{J}{kg-K}}$$
$$\large{ T }$$ = temperature $$\large{F}$$ $$\large{K}$$
$$\large{ V }$$ = volume $$\large{ft^3}$$ $$\large{m^3}$$