Solubility parameters (SP) of three polymers have been estimated and compared with both experimental values. The methods employed for the estimation are: traditional group contribution procedures (Fedors and van Krevelen), molecular dynamics simulation to calculate cohesive energy density and extension of the COSMO-SAC thermodynamic model to polymer mixtures. The aim of the paper is accurately predicted polymer solubility parameters showing differences between methods. Selected polymers have been polyvinyl alcohol (PVA), ethylene-co-vinyl acetate (EVA) and bisphenol-A polycarbonate (PC). (C) 2012 Elsevier B.V. All rights reserved.