Enter the solid conductor radius (mm) and the into the Geometric Mean Radius Calculator. The calculator will evaluate the Geometric Mean Radius.

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## Geometric Mean Radius Formula

The following two example problems outline the steps and information needed to calculate the Geometric Mean Radius.

GMR = .7788 * r

Variables:

- GMR is the Geometric Mean Radius (mm)
- r is the solid conductor radius (mm)

To calculate the geometric mean radius (GMR), multiply the solid conductor radius by .7788.

## How to Calculate Geometric Mean Radius?

The following steps outline how to calculate the Geometrics Mean Radius.

- First, determine the solid conductor radius (mm).
- Next, gather the formula from above = GMR = .7788 * r.
- Finally, calculate the Geometric Mean Radius.
- After inserting the variables and calculating the result, check your answer with the calculator above.

**Example Problem : **

Use the following variables as an example problem to test your knowledge.

solid conductor radius (mm) = 15

GMR = .7788 * r** **= ?