Some aspects provide determination of mutual capacitances among a plurality of floating nets and a plurality of non-floating nets, determination of a self-capacitance of each of the plurality of non-floating nets based on the mutual capacitances, and, for each of the plurality of non-floating nets, association of a ground capacitance with a non-floating net that is substantially equal to a determined self-capacitance of the non-floating net. Aspects may further provide performance of a timing study of a capacitor network including the plurality of non-floating nets using the ground capacitance determined for each of the plurality of non-floating nets.