 This research explores the accuracy and applicability of the finite element method AFEM, in calculating the resonance frequency of multineck Helmholtz resonators with various configurations, including cylindrical or spherical bodies, flanged or unflanged necks, and single neck resonators. The FEM results are compared with a theoretical model and lumped element approximation, multineck, and reveal little deviation between the FEM and theoretical model but significant error in comparison with the lumped element approximation. The FEM can be used to expand our understanding of multineck Helmholtz resonators performance under various conditions and configurations, and its applicability extends to special cases where analytical formulas are not trivial. The method can be applied in various fields such as acoustic metamaterials, musical acoustics, and noise mitigation. This article was authored by Nikolaos M. Papadakis and Georgios E. Stavrilakis.