In this paper, a numerical method for calculating the wideband, low-frequency, eddy-current response of a metallic body-of-revolution is described. Solutions are given in a modal decomposition that can be related to the discrete spectrum of relaxation frequencies and the measured magnetic polarizability dyadic. Calculated responses are compared with the analytically known solution for a sphere and measured responses for a cylinder. A graph of the relaxation frequencies and moments for the two most dominant modes in a cylinder, given as a function of aspect ratio, is provided.