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. 

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:

  1. First, determine the internal point (x1,y1). 
    • The internal point (x1,y1) is given as: 3,5.
  2. Next, determine the point along the radius (x2,y2). 
    • The point along the radius (x2,y2) is provided as: 10,20.
  3. 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)) = ?