Values of the viscosities of liquid metals are important in the prediction of fluid flow in many metallurgical manufacturing processes. In this work the friction theory (f-theory) for viscosity modeling is used in conjunction with PC-SAFT equation of state for describing the viscosity behavior of liquid metals (Li, Na, K, Rb, Cs, Mg, Ca, Sr, Ba, Hg, In, Ag, Ni, Au, Al). This f-theory model has been shown to provide satisfactory results for the modeling of the viscosity of liquid metals over wide range of temperature. The average deviation is 1.10%.