Macroscopic internal state variable models of deformation are guided by mechanisms which arise on the atomic scale. As such, techniques for connecting atomic level configurations to macroscopic variables are necessary for the accurate modeling of deformation phenomena on the continuum level. However, continuum quantities, such as strain, cannot be measured in discrete systems, as they inherently rely on a continuous displacement field. Preliminary efforts have been made to approximate the deformation gradient and strain tensor in an atomistic system. Methods to calculation deformation variables, however, such as plastic strain or plastic spin, have not yet been demonstrated in atomistic simulations. In this presentation, we provide an automated technique for computing the full deformation gradient, as well as both the elastic and plastic strain tensors and their derivatives. From this method, a number of useful continuum level variables are calculated and compared with finite element simulation.