We formulate a method to calculate a turbidity of a polymeric material having a spatial fluctuation of refractive index coming from spherulites of comparable size with the wave length of visible light. We carry out computer simulations of spherulites growth satisfying Avrami equation. Using the obtained spherulites structures, we estimate a turbidity of polyethylene and compare the turbidity with actual measurements of Polyethylene haze. © 2004 American Institute of Physics