This study suggests a general approach to determining the screw and die characteristics for a three dimensional flow consisting of two combinations of screw geometry in the rubber extrusion, i.e., screw channels with and without pin together with the special extrusion die attached at end. In the proposed approach, we numerically compute the screw and die characteristics in terms of the geometry, operating and material conditions. Geometry condition include several things for aspect ratio of channel, L/D ratio of screw, combination of pins installed and die geometry parameters, and operating conditions for screw rotation and temperature, and finally material conditions for the generalized Newtonian fluid. All numerical data obtained by numerical simulation might be recalculated in terms of dimensionless forms and stored into database for the given screw-die system. Note that the full computation again every time for the specific given condition for the three-dimensional flow in the whole domains of screw and die geometries would take a long computation time and not give us information for screw-die characteristics as a whole. However, the proposed approach with such database will be very useful for rubber extruder designers to understand the effect of different conditions on the screw-die characteristics. As a result, with database it is simple to predict the total flow rate and pressure gradient in a rubber extruder in terms of screw rotational speed for the given temperature and materials without fully computing again the three-dimensional flow.