An RLC module is configured to provide a simplified circuit modeling of a selected circuit net (or portion) of an electronic circuit. The RLC module may be configured to substitute an RLC circuit model for the selected circuit net, where the effective values of the capacitance and inductance for the RLC circuit model are retrieved from a table of capacitance and inductance values. A set of interconnect geometry factors (e.g., line length, line width, driver/receiver length, etc.) that describes the circuit net is used as an index into the table of capacitance and inductance values. The retrieved values of the effective capacitance and inductances values may be used to calculate a delay for the RLC circuit model. The RLC module may provide the capability to quickly calculate a delay for a selected circuit net without using computationally intensive calculations for inductance and capacitance values of circuit nets.