Enter the center-to-center distance and the sum of the ellipses’ radii into the Calculator. The calculator will evaluate the Separation Factor. 

Separation Factor Formula



  • SF is the Separation Factor ()
  • CCD is the center-to-center distance
  • SER is the sum of the ellipses’ radii

To calculate Separation Factor, divide the center-to-center distance by the sum of the ellipses’ radii.

How to Calculate Separation Factor?

The following steps outline how to calculate the Separation Factor.

  1. First, determine the center-to-center distance. 
  2. Next, determine the sum of the ellipses’ radii. 
  3. Next, gather the formula from above = SF = CCD / SER.
  4. Finally, calculate the Separation Factor.
  5. 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.

center to center distance = 16

sum of the ellipses radii = 40