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.

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## 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?

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

**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.

**Finally, use the equivalent impedance to solve your problem.**You can now use this impedance as the impedance of the entire circuit.

## About Parallel Impedance

**How to add parallel impedances? **To combine parallel impedances, you must use the same formula that is displayed above, but instead of using the individual impedances, you would use the two or more calculate parallel impedances.