Inductors connected in series and/or parallel configurations can be simplified to an equivalent single inductor. Consider a series connection of inductors with the same current flowing through them. When Kirchhoff's voltage law is applied to the loop, and the expression for the inductor voltages is substituted, the resulting expression indicates that the equivalent inductance of these series-connected inductors equals the sum of the individual inductances. Next, consider a parallel connection of inductors, where each inductor experiences the same voltage across it. Kirchhoff's current law is applied to the loop, and the expression for the inductor current is substituted. Since the initial current through the equivalent inductor is the sum of the individual inductor currents, the sum of the reciprocals of the individual inductances equals the reciprocal of the equivalent inductance. Inductor combinations in series and in parallel follow similar rules as resistors. Consider a circuit with both series and parallel inductors. The equivalent inductance of the parallel combination of inductors is calculated and added to the series inductance to obtain the total equivalent inductance.