Enter the average fiber count per graticule field, the mean field blank count per graticule field, and the graticule field area (mm^2) into the Fibre Density Calculator. The calculator will evaluate the Fibre Density. 

Fiber Density Formula

The following formula is used to calculate the Fiber Density. 

E = (AF - MFB) / A

Variables:

  • E is the Fiber Density (fibers/mm^2)
  • AF is the average fiber count per graticule field 
  • MFB is the mean field blank count per graticule field 
  • A is the graticule field area (mm^2) 

To calculate the fiber density, subtract the mean field blank count per graticule field from the average fiber count per field, then divide by the field area.

How to Calculate Fiber Density?

The following steps outline how to calculate the Fiber Density.

  1. First, determine the average fiber count per graticule field.
  2. Next, determine the mean field blank count per graticule field. 
  3. Next, determine the graticule field area (mm^2). 
  4. Next, gather the formula from above = E = (AF – MFB) / A.
  5. Finally, calculate the Fibre Density.
  6. 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.

average fiber count per graticule field = 50

mean field blank count per graticule field = 20

graticule field area (mm^2) = 3

E = (AF – MFB) / A =  ?