Enter the number of stomata in the FOV and the area (mm^2) into the Stomatal Density Calculator. The calculator will evaluate and display the Stomatal Density. 

Stomatal Density Formula

The following formula is used to calculate the Stomatal Density. 

Ds = #S / A

  • Where Ds is the Stomatal Density (stomata/mm^2)
  • #S is the number of stomata in the FOV 
  • A is the area (mm^2) 

How to Calculate Stomatal Density?

The following example problems outline how to calculate Stomatal Density.

Example Problem #1:

  1. First, determine the number of stomata in the FOV. 
    1. The number of stomata in the FOV is given as: 365.
  2. Next, determine the area (mm^2). 
    1. The area (mm^2) is provided as: 3.
  3. Finally, calculate the Stomatal Density using the equation above: 

Ds = #S / A

The values given above are inserted into the equation below:

Ds = 375 / 3 = 125 (stomata/mm^2)


Example Problem #2: 

For this problem, the variables needed are provided below:

number of stomata in FOV = 753

area (mm^2) = 38

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

Ds = #S / A = ?