A method is proposed for investigating the parameters of entrainment of drops due to their inertial path, ponderomotive forces of the electric field, and viscous friction of the phases. The concept entrainment coefficient characterizing the portion of drops being transported is introduced. It is shown that the use of the electric field is most advisable for an experimental determination of the parameters of entrainment. Processing of experimental data on electro convective entrainment of drops from the surface of a bubbling layer of distilled water was carried out by the proposed method.