The proposed algorithm for calculating the mechanical power makes it possible to determine the value of the mechanical power developed by each separately considered winding of the electromechanical converter. The developed mechanical power of an electric motor is one of the main parameters that determine the efficiency of its functioning. It allows you to form special operating modes of the electric drive, for example, shockless, with a constant motor speed. The monitoring of the mechanical power of the electric motor reveals the pre-emergency and emergency state of the electric drive. The relevance of the work is due to the need to develop methods for determining the instantaneous values of mechanical power. The proposed algorithm for determining the mechanical power developed by an electromechanical converter does not require the use of mechanical torque sensors, which reduces the cost of monitoring systems for the load of electric drive equipment. The reliability of the proposed algorithm is confirmed by the results of numerical simulation of the dynamic dependence of the mechanical power developed by the 6DBM40 series torque motor.