Abstract-- The paper presents the implementation of nonlinear least-squares regression in a Field Programmable Gate Array (FPGA) device. The implemented algorithm is very performant in obtaining the coefficients of nonlinear functions from a set of input data using the least squares regression using the method of Gauss-Newton. The convergence time of the algorithm is greatly smaller with respect to microprocessors and DSPs at state of art with a power dissipation well below 10W.