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This paper is focused on the uncertainty estimate of a hybrid experimental-numerical procedure for the evaluation of the electric field induced in a human model radiated by a low-frequency magnetic field produced by unknown sources. The procedure is based on magnetic field measurements in a limited number of points around the field source and makes use of the boundary element method. The uncertainty contribution due to the measurement operations is taken into account by evaluating its propagation through the computational process using a Monte Carlo approach coupled to a discrete numerical technique. The procedure is then applied to the case of a body exposed to the field generated by a Helmholtz coil system. The results show that the relative standard uncertainty of the estimated induced electric field is within a few percent.