Mobile grids are one of the emerging grid types. They help to pool the resources of several cooperative mobile devices to resolve a computationally intensive task. Mobility management is a key challenge in mobile grids which includes mechanisms to track and maintain the locations of mobile nodes. Mobility prediction is one of the most important components of mobility management, which defined as proactively tracking the future locations of mobile users. In this paper we introduce a straight forward mobility predictor that can predict the future locations of mobile users and the duration for which the users will remain in those locations.