Enter the inner radius and the thickness of the hollow tube into the calculator to determine the outer radius.

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## Outer Radius of a Hollow Tube Formula

The following equation is used to calculate the Outer Radius of a Hollow Tube.

R = r + t

- Where R is the outer radius
- r is the inner radius
- t is the thickness of the tube wall

To calculate the outer radius of a hollow tube, add together the inner radius and the wall thickness.

## What is the Outer Radius of a Hollow Tube?

Definition:

The outer radius of a hollow tub is defined as the distance from the axial center of the tube to the outer surface area.

## How to Calculate Outer Radius of a Hollow Tube?

Example Problem:

The following example outlines the steps and information needed to calculate Outer Radius of a Hollow Tube.

First, determine the inner radius. In this example, the inner radius is measured to be 4 inches.

Next, measure the wall thickness. This hollow tube has a wall thickness of .5 inches.

Finally, calculate the outer radius using the formula above:

R = r + t

R = 4+.5

R = 4.5 inches