Enter the surface tension force (N) and the change in surface area (m^2) into the calculator to determine the Surface Energy. 

Surface Energy Formula

The following equation is used to calculate the Surface Energy. 

SE = Fst * dA


  • Where SE is the Surface Energy (N*m^2)
  • Fst is the surface tension force (N) 
  • dA is the change in surface area (m^2) 

How to Calculate Surface Energy?

The following two example problems outline the steps and information needed in order to calculate the Surface Energy.

Example Problem #1:

  1. First, determine the surface tension force (N). In this example, the surface tension force (N) is measured to be 5.
  2. Next, determine the change in surface area (m^2). For this problem, the change in surface area (m^2) is calculated to be 4.
  3. Finally, calculate the Surface Energy using the formula above: 

SE = Fst * dA

Inserting the values from above and solving the equation with the imputed values gives: 

SE = 5 * 4 = 20 (N*m^2)

Example Problem #2: 

Using the same process as example problem 1, we first define the needed variables outlined by the formula. In this case, the values are provide as: 

surface tension force (N) = 6

change in surface area (m^2) = 4

Entering these values into the formula or calculator above gives us: 

SE = 6* 4 = 24 (N*m^2)