This work reports a procedure for predicting the interfacial tension of pure fluids. It is based
on scaling arguments applied to the influence parameter of the van der Waals theory of inhomogeneous
fluids. The molecular model stems from the application of the Square Gradient Theory to
the SAFT-VR Mie equation of state. The theory is validated against computer simulation results
for homonuclear pearl-necklace linear chains made up to six Mie (λ−6) beads with repulsive exponents
spanning from λ = 8 to 44 by combining the theory with a corresponding states correlation
to determine the intermolecular potential parameters. We provide a predictive tool to determine
interfacial tensions for a wide range of molecules including hydrocarbons, fluorocarbons, polar
molecules, among others. The proposed methodology is tested against comparable existing correlations
in the literature, proving to be vastly superior, exhibiting an average absolute deviation of
2.2 %.