Enter the individual impedances of up to 5 different components to determine the equivalent impedance of those components in parallel. This calculator can also be used to calculate the impedance in series.

## Parallel Impedance Formula

The following formula is used to calculate an equivalent impedance of components in parallel.

I = 1 / [ (1/i1) + (1/i2) + (1/i3) + (1/i4) + (1/i5) ]

• Where I is the equivalent parallel impedance (ohms)
• i1 – i5 are the individual impedances of the components (ohms)

## Parallel Impedance Definition

What is a parallel impedance? A parallel impedance is a measure of the equivalent impedance of a circuit whose components are assembled in parallel. In parallel circuits, the voltage is the same across every component.

## Example Problem

How to calculate parallel impedance?

1. First, determine the individual impedances.

For this example, we have impedances of 5 components which equal; 10, 12, 20, 5, and 7 ohms respectively.

2. Next, use the formula to calculate the equivalent impedance.

Using the formula, we find the equivalent impedance to be: 1 / [ (1/10) + (1/12) + (1/20) + (1/5) + (1/7) ] = 1.735 ohms.

3. Finally, use the equivalent impedance to solve your problem.

You can now use this impedance as the impedance of the entire circuit.