  In the present paper, we show a simple method to obtain fittings for the
surface and curvature tensions. The method uses the nuclear mass of a spherical
fully ionized atom and a simple expression for the binding energy such that a
least square fit is found when confronted with the Atomic Mass Evaluation (AME)
2020. The fittings are then used to evaluate the pasta phase free energy per
particle, which is confronted with the one obtained with a Thomas-Fermi
fitting. The results are very encouraging and suggest that this recipe can be
safely used whenever the surface and curvature tensions are necessary.
