How is the density of neutron star material quantified in terms of weight per cubic centimeter?

A single cubic centimeter would weigh billions of tons.

The extreme compression achieved during the formation of a neutron star results in densities that are almost incomprehensible by terrestrial standards. A neutron star packs more mass than the Sun into a sphere only about 20 kilometers wide. This level of mass concentration translates to an almost unbelievable density. The material is so tightly packed—where matter has been squeezed past the density of atomic nuclei—that a sample volume as small as a single cubic centimeter would possess an equivalent weight measured in the billions of tons. This density illustrates the extreme physical states governed by neutron degeneracy pressure within this compact object.