The objective of this study is to determine the minimum number of grid points required to effectively prevent any subsequent changes in the outcomes as the grid point density increases. The evolution of the MARD between cDFT and GCMC of two subsequent values of grid points will be computed with Eq. 2 with the reference being the higher grid point density. The results are presented in Fig. . For the adsorption isotherms in Fig. , the MARD changes by less than 5.5 % from 2 Å -1 to 2.5 Å -1 and by less than 3.2 % from 2.5 Å -1 to 3 Å -1 . The maximum evolution between 2 Å -1 and 3 Å -1 is 6.2 %. This observation makes 2 Å -1 a reasonable density to offer good accuracy for adsorption isotherms in most cases. For the case of the enthalpy of adsorption in Fig. , there are several systems that show substantial evolutions between 2 Å -1 and 2.5 Å -1 . These cases actually have unreasonable values for the enthalpy of adsorption at specific pressures (see Fig. ). As these large deviations are sudden and abrupt, we assume that they are due to numerical errors during the optimization phase of cDFT. However, these significant deviations can easily be detected and corrected by increasing the density of grid points in most cases.