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Nucleon electric dipole moments originating from strong CP-violation arebeing calculated by several groups using lattice QCD. We revisit the finitevolume corrections to the CP-odd nucleon matrix elements of the electromagneticcurrent, which can be related to the electric dipole moments in the continuum,in the framework of chiral perturbation theory up to next-to-leading ordertaking into account the breaking of Lorentz symmetry. A chiral extrapolation ofthe recent lattice results of both the neutron and proton electric dipolemoments is performed, which results in$d_n=(-2.7\pm1.2)\times10^{-16}e\theta_0$cm and$d_p=(2.1\pm1.2)\times10^{-16}e\theta_0$cm.

Finite-volume corrections to the CP-odd nucleon matrix elements of the electromagnetic current from the QCD vacuum angle