Abstract: For more precisely calculating the resonance frequency of practical resonance pipes, two methods were presented, which are the method of sound pressure simulation and the method of the minimum point of standing wave. Both methods are based on the theoretical simulation of the sound pressure distribution in the pipe and the relation between the minimum point position of the standing wave and the acoustic impedance of the pipe ends, respectively. It is demonstrated that the two methods can calculate the resonance frequency of a pipe more precisely and rigorously by considering the effect of the acoustic damping of both ends of the pipe. Therefore the two methods presented are more useful in several acoustic research fields in which the resonance frequency of a pipe must be controlled strictly. It is also demonstrated that the method of sound pressure simulation and the method of the minimum point of standing wave can get the same calculation result despite of their different ways. The method of the minimum point of standing wave is more convenient, nevertheless both the resonance frequency and the distribution of the sound pressure in the pipe can be obtained by using the method of sound pressure simulation.