The principal objective of this work was to study the influence of the number of elements has on a finite element mesh’s (FEM) simulation results. The simula-tion results analyzed were weight, and linear shrinkage along the length and width of a injected plastic specimen. Also, simulation results were compared with results obtained from solids modeling software (CAD) and from a simulator software (CAE). The convergence simulation results showed similar trends with the experimental ones. The modeling mesh gives a faster convergence than the simulator one.