Enter the internal point (x1,y1) and the point along the radius (x2,y2) into the Radial Distance Calculator. The calculator will evaluate and display the Radial Distance.

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## Radial Distance Formula

The following formula is used to calculate the Radial Distance.

Drad = SQRT ( (X2-X1)^2+(Y2-Y1)^2))

- Where Drad is the Radial Distance
- X1,Y1 is the internal point (x1,y1)
- X2,Y2 is the point along the radius (x2,y2)

## How to Calculate Radial Distance?

The following example problems outline how to calculate Radial Distance.

Example Problem #1:

- First, determine the internal point (x1,y1).
- The internal point (x1,y1) is given as: 3,5.

- Next, determine the point along the radius (x2,y2).
- The point along the radius (x2,y2) is provided as: 10,20.

- Finally, calculate the Radial Distance using the equation above:

Drad = SQRT ( (X2-X1)^2+(Y2-Y1)^2))

The values given above are inserted into the equation below and the solution is calculated:

Drad = sqrt((10-3)^2+(20-5)^2)) = 16.55

Example Problem #2:** **

For this problem, the variables needed are provided below:

internal point (x1,y1) = 5,6

point along the radius (x2,y2) = 30,40

This example problem is a test of your knowledge on the subject. Use the calculator above to check your answer.

Drad = SQRT ( (X2-X1)^2+(Y2-Y1)^2))** = ?**