The ground-state masses of even–even 226Ra–278Cn isotopes are obtained within the macroscopic–microscopic model using the Lublin Strasbourg drop mass formula for the macroscopic part and the Yukawa-folded single-particle potential to evaluate the microscopic energy corrections. The pairing correlations are included within the Bardeen–Cooper–Schrieffer formalism with an approximated particle number projection. The coupling of the rotation with the pairing field is taken into account when evaluating the energies of the ground-state rotational band.