Series Capacitor Calculator

This tool calculates the total capacitance for any number of capacitors connected in series.

Formula

When capacitors are connected in series, the total or equivalent capacitance (Ctotal​) is less than any individual capacitor’s capacitance in the circuit.

The formula to calculate the total capacitance of n capacitors connected in series is given by the reciprocal of the sum of the reciprocals of their individual capacitances:

1/Ctotal​ = 1/C1​​+ 1/C2​ ​+ ⋯ +Cn​​

Or for two capacitors in series, it simplifies to:

1/Ctotal​ = 1/C1​​+ 1/C2​ ​​

And Ctotal can be found by taking the reciprocal of the sum:

Ctotal = C1C2/(C1+C2)

Example Calculation

Two capacitors with values 1 µF and 3 µF in series gives a total series capacitance value of 0.75 µF.

👉 Try the parallel capacitor calculator

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