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) 

To calculate the stomatal density, simply divide the number of stomata in the field of view by the area.

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 = ?