[en] The systematic behavior of the cross sections of (n,"3He) nuclear reactions has been studied by various researches at neutron energy of 14.6 MeV. A new empirical formula based on the Q-value dependence of the cross sections of the investigated reaction has been proposed. The cross sections obtained from the new formula are compared with the other proposed formulae results and the experimental data. It seems that the present formula based on the Q-value dependence provides the good description for cross sections of neutron-induced (n,"3He) nuclear reactions at 14.6 MeV. - Highlights: • The new empirical formula for the calculating of (n,"3He) cross sections at 14.6 MeV was obtained. • The cross section formula was based on the Q-value of nuclear reaction. • The obtained cross section results were compared with other cross sections.