As widely used highly efficient industrial equipment high-shear mixers have some advantages over the other types of hydromechanical equipment. This is mostly due to the complex multifactorial influence on the liquid allowing to increase the velocity of technological processes in multicomponent liquid systems. The variety of the impacts intensity combinations on the fluid in the high-shear mixers leads to the establishment of a large number of formulae recommended for determining the characteristics of the apparatus and the parameters of the technological processes carried out in it. However, in the most cases, such formulae are defined for one or more selected designs of high-shear mixers operating under certain conditions. This is resulted in the lack of systematic approach to substantiating the recommendations for defining the configurations and parameters of the working bodies of the apparatus in given operating modes. The essence of the study was to analytically review the thematic information resources in order to identify the approaches to determination of the estimated energy consumption in high-shear mixers. According to the results of the review we have selected the formulae determining the energy consumption in the high-shear mixers with consideration of the parameters of their designs and rotor dynamics. The selection criteria included the following: 1) the completeness of the description for obtaining the formulae and quantities included in their composition; 2) availability of information on the practical testing of formulae; 3) the presence of the references to the study where the selected formulae are proposed in other sources of information. Using the selected formulae, the energy consumption in the high-shear mixer is determined for two basic variants of the apparatus constructions (pulse and impulse). The determination was carried out according to the algorithm envisaging calculation of the power required to ensure the operation of one stage of operation and the power required to ensure the operation of the high-shear mixers in general.The possibility of the effective application of the selected formulae in the calculations of high-shear mixers and their working bodies has been established. Recommendations for their practical use have been provided.The calculations results show significant differences in the calculated values. Moreover, these differences arise during the determination of energy consumption both in the pulse and in the impulse apparatuses.As a result of the calculations, it has been established that majority of known formulae for the determination of the power of high-shear mixers are not versatile and cannot be recommended for machine calculations, the design of working bodies or layout of which is different from those for which these formulas have been directly derived. Thus, the use of existing approaches to the energy calculation of high-shear mixers requires careful justification in each particular case, which complicates the development and selection of equipment. It seems to be promising to continue the research aimed at finding more versatile and accurate formulas for determining the energy characteristics of high-shear mixers.Key words: high-shear mixer, operation stage, power number, Reynolds number.