In recent years there has been a thrust towards developing high efficiency motors for industrial applications. To design a high efficiency motor, it is necessary to develop models that can estimate the losses in the motor. One of the losses that is difficult to estimate is stray losses. In this work a mathematical model for estimation of stray losses in an induction motor is presented. This technique is based on empirical equations. These empirical equations are functions of electrical equivalent circuit parameters of the induction motor. The results of the proposed model are compared with experimental values of stray losses. These comparisons were done for 18 different types of motors, and it seen that the proposed model gives a good estimation of stray losses for induction motors.