Capacitance in Parallel Circuits

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Capacitance in a parallel circuit is additive. This is a short hand way of saying that the total capacitance in a series circuit equals the sum of each of the capacitance values in the circuit.

So the formula is Ct = C1 + 2C + C3 + C4 in a circuit with 4 components.

If you know the total capacitance and all individual capacitance values except one, then the capacitance of the missing value can be calculated by subtracting all known individual capacitance values from total capacitance. The result will be the capacitance of the individual missing component.

Here are formulas for a circuit with 4 components when one is missing and you know the total:

If C1 is missing, then C1 = Ct - C2 - C3 - C4

If C2 is missing, then C2 = Ct - C1 - C3 - C4

If C3 is missing, then C3 = Ct - C1 - C2 - C4

If L4 is missing, then C4 = Ct - C1 - C2 - C3

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