A new method is presented for the evaluation of the edge-capacitance correction for electrodes of finite thickness. The corrections are divided into three separate components: electrode thickness, the lower edge of the electrodes, and the back of the electrodes. Simple correction formulae are derived for the first two components and a set of curves is provided which enables the direct evaluation of the third component from an equally simple formula. Numerical results show excellent agreement with those obtained by more tedious graphical methods.