Permeabilitas

Qf = Laju alir fluida, cm/sec
A = Luas penampang media berpori, cm 
μ = Viskositas fluida, cps 
ΔP = P – P = Perbedaan tekanan, atm 
L = Panjang media berpori, cm 
K = Permeabilitas, Darcy