This experiment determined the temperature profile of a vertical steel fin both experimentally and theoretically. A steel fin was placed on a heating element set to 365 K and allowed to reach steady state. Thermocouples measured the decreasing temperature profile from the base to tip of the fin. The experimental results varied slightly from the theoretical profile mainly due to errors in temperature measurements at the fin surface. Comparing the experimental and theoretical profiles showed good agreement between the two methods of analyzing the fin's temperature change.