The investigation gives a comparison of the best-known kinetic evaluation methods for DTA curves. With regard to accuracy and error-compensation, the methods of Borchardt and Daniels, Coats and Redfern and Satava and Skvara in particular are to be recommended if simple irreversible reactions are to be evaluated on the basis of homogeneous kinetics. The complete exponential integral method is described which totally eliminates the approximative character of the practical procedure of Coats and Redfern. Hence, it becomes theoretically exact again.