In profile extrusion, one of the most crucial steps in obtaining a high quality, correctly sized profile is the calibration and accompanying cooling phase. In order to eliminate residual stresses and to induce adequate sizing of the profile, fast and uniform cooling of the extrudate is needed. By placing cooling channels as close as possible to the extrudates surface inside the calibrator, which is possible by using SLM produced calibrators, the temperature gradient along the profiles surface and its thickness, can be minimized resulting in better and faster cooling of the extrudate. The potential and advantages of using SLM produced calibrators with conformal cooling channels is even more apparent for profiles with small details which are currently unreachable using conventional mechanical processing techniques. In this paper the effect of using conformal cooling channels in extrusion calibrators is studied using Siemens NX simulation software. Temperatures of both cooling water and of the polymer extrudate are studied. These simulations are used to optimize calibrator design and reduce cooling time. Based on these simulation, an estimation is giving of the advantages and potential of using additive manufactured calibrators in the polymer extrusion process.