The heat transfer process with boiling on a fin cannot be treated in a conventional manner of assuming a constant heat transfer coefficient. This report proposes a simplified method for determining fin performance. The heat transfer coefficients in boiling region is approximated by n ty power function of superheat. The results yield the temperature gradient as a function of superheat, fin width, and thermal conductivity of the fin. Computed results for water boiling on fin compare favorably with those obtained from a small-increment numerical solution.